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1

High-temperature oxidation of Fe40Al5Cr0.2ZrB and TiAl intermetallic phase alloys

Cebulski Janusz

Ochrona przed Korozją

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2023

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nr 6

170--174

EN

A comparison of high-temperature corrosion resistance was carried out between Fe40Al5Cr0.2ZrB intermetallic phase-based alloy and TiAl alloy by annealing in air at 1000°C for 50 h, 100 h, 200 h, and 500 h. The extent of oxide scale formation on the surface of both alloys was determined and related to the initial surface condition before the oxidation process. The surfaces of both materials were analyzed and compared after the same annealing time. The surface condition before and after oxidation was examined using a stereoscopic microscope. The kinetics of the oxidation process at 1000°C over a period of 500 h were determined. Samples after oxidation were observed using a Hitachi S-4200 scanning electron microscope. Additionally, energy-dispersive X-ray spectroscopy (EDS) was performed to analyze the chemical composition of all tested samples of both materials after oxidation. The relationship between the occurrence of corrosion products for each of the tested materials and the annealing time was demonstrated.

PL

W pracy dokonano porównania odporności na korozję wysokotemperaturową stopu na osnowie fazy międzymetalicznej Fe40Al5Cr0,2ZrB i stopu TiAl poprzez wyżarzanie w powietrzu w temperaturze 1000°C przez 50 h, 100 h, 200 h i 500 h. Określono powierzchnię zgorzeliny tlenkowej obu stopów i odniesiono te dane do stanu powierzchni przed procesem utleniania. Przeanalizowano i porównano powierzchnie obu materiałów po jednakowym czasie wyżarzania. Badania stanu powierzchni przed utlenianiem i po utlenianiu wykonano za pomocą mikroskopu stereoskopowego. Wyznaczono kinetykę procesu utleniania w temperaturze 1000°C w czasie 500 h. Próbki po procesie utleniania obserwowano przy użyciu elektronowego mikroskopu skaningowego Hitachi S-4200. Przeprowadzono również mikroanalizę rentgenowską składu chemicznego (EDS) wszystkich badanych próbek obu materiałów po utlenianiu. Wykazano zależność między występowaniem produktów korozji każdego z badanych materiałów a czasem wyżarzania.

2

The formation of Al-Si aluminide coatings by pack cementation method on TNM-B1 intermetallic alloy

Woźniak Mateusz, Góral Marek, Kościelniak Barbara

Advances in Mechanical and Materials Engineering

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2023

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Vol. 40, nr 1

79--86

EN

The TiAl intermetallics are the promising material for aerospace application. According to its insufficient oxidation resistance above 900°C the using of protective coatings is necessary. The diffusion aluminide coatings based on TiAl2 or TiAl3 phases permits to formation of alumina scale on the surface of TiAl alloys. The pack cementation with Si doping is one of the most popular method of this type of coatings production. In present article the influence of Si content in the pack, process time and temperature during pack cementation process were investigated. The thickness of obtained coating was in range 20-50 μm. When Si content was higher the formation of titanium silicides was observed using almost all analysed values of process parameters. The results showed that using of 24 wt. % Si containing pack and process parameters: 4h/950°C enables to obtain the coating characterized by optimal thickness and structure. The porosity and cracks in coatings according to TiAl phases brittleness was observed.

PL

Fazy międzymetaliczne TiAl są obiecującym materiałem do zastosowań w lotnictwie. Ze względu na niedostateczną odporność na utlenianie powyżej 900°C konieczne jest stosowanie powłok ochronnych. Dyfuzyjne powłoki aluminidkowe na bazie faz TiAl2 lub TiAl3 pozwalają na tworzenie się zgorzeliny tlenku aluminium na powierzchni stopów TiAl. Aluminiowanie metodą kontaktowo gazową z wprowadzaniem Si jest jedną z najpopularniejszych technik wytwarzania tego typu powłok. W niniejszym artykule zbadano wpływ zawartości Si w powłoce w zależności od czasu trwania procesu oraz temperatury. Grubość otrzymanej powłoki zawierała się w przedziale 20-50 μm. Gdy zawartość Si była wyższa, obserwowano powstawanie krzemków tytanu przy prawie wszystkich analizowanych wartościach parametrów procesu. Wyniki pokazały, że użycie proszku zawierającego 24% wag. % Si oraz czasu i temperatury 4h/950°C pozwala na uzyskanie powłoki charakteryzującej się optymalną grubością i strukturą. Zaobserwowano porowatość i spękania powłok.

3

The formation of Si-aluminide coating formed by plasma spraying and subsequent diffusion annealing on Ti-Al-7Nb intermetallic alloy

Góral M., Monteiro P.C., Sosnowy C., Woźniak M., Kubaszek T., Kościelniak B.

Archives of Materials Science and Engineering

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2022

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Vol. 117, nr 2

49--56

EN

Purpose: In the article, the kinetic growth phenomena of aluminide coating formed by plasma spraying pure Al-Si powder and subsequent diffusion annealing on TiAl intermetallic alloy in inert atmosphere were investigated. Design/methodology/approach: The Al-Si powder was thermal sprayed (APS) on TiAl7Nb intermetallic alloy and annealed in Ar atmosphere during 5, 15, 30, 60, 240 and 480 min. The kinetic growth of the coating was observed using the scanning electron microscopy method (SEM), and chemical composition was analysed using the EDS method. Findings: The Kirkendall Effects pores formation, as well as titanium silicides on the grain boundary of TiAl3, was found. Research limitations/implications: The oxidation resistance of the developed coating might be analysed in further work. Practical implications: The developed coating might be used for the production of protective aluminide coatings on TiAl intermetallic alloys. Originality/value: The description of aluminide coating formation in a new technological process.

4

TiAl-based Ohmic Contacts to p-type 4H-SiC

Martychowiec Agnieszka, Kwietniewski Norbert, Kondracka Kinga, Werbowy Aleksander, Sochacki Mariusz

International Journal of Electronics and Telecommunications

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2021

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Vol. 67, No. 3

459--463

EN

This paper describes successfully formed ohmic contacts to p-type 4H-SiC based on titanium-aluminum alloys. Four different metallization structures were examined, varying in aluminum layer thickness (25, 50, 75, 100 nm) and with constant thickness of the titanium layer (50 nm). Structures were annealed within the temperature range of 800°C - 1100°C and then electrically characterized. The best electrical parameters and linear, ohmic character of contacts demonstrated structures with Al layer thickness equal or greater than that of Ti layer and annealed at temperatures of 1000°C or higher.

5

Application of Artificial Neural Network for Prediction of the Cyclic Oxidation Behavior of Electrical Resistance Sintered Gamma-TiAl Intermetallics

Garip Yiğit, Garip Zeynep Batık, Ozdemir O.

Archives of Metallurgy and Materials

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2021

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Vol. 66, iss. 2

581--591

EN

TiAl based intermetallics are widely used for structural applications in aviation, chemical engineering, automotive and sports equipment. In this study, the electrical resistance sintering (ERS) technology used in the production of gamma-TiAl intermetallics is based on the principle of applying pressure simultaneously with a high-density electric current. The purpose of this study was to investigate the cyclic oxidation resistance of Ti-44Al-3Mo and Ti-44Al-3Nb alloys (at.%) and the applicability of artificial neural network (ANN) modeling for the forecast of the oxidation behavior of these alloys. In order to obtain this aim, the alloys sintered by ERS were oxidized at 900°C for 360 h and then the oxidation behaviors of them are evaluated by plotting a graph between weight change as a function of time. The data collected after the oxidation experiments were used to construct the prediction models. The modelling results show that a good agreement between experimental results and prediction results was found. The oxidized alloys were characterized using XRD and SEM-EDS. The XRD patterns revealed the oxidation products are composed of TiO2 and Al2O3 oxides. SEM-EDS analysis indicated that the oxide scales of alloys are made up of a multilayered structure.

6

Influence of annealing on the microstructure of cast TiAl-based alloy

Lapin J., Pelachová T.

Journal of Achievements in Materials and Manufacturing Engineering

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2014

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Vol. 65, nr 2

53--60

EN

Purpose: The aim of the present work is to study the influence of annealing on the microstructure of cast TiAl-based alloy. Design/methodology/approach: Effect of annealing on the microstructure of cast Ti-46Al-8Ta (at.%) alloy was evaluated at temperatures ranging from 700 to 800°C. Fine grain convoluted microstructure of heat treated alloy consisted of small lamellar colonies of α2-Ti3Al (crystal structure D019) intermetallic phase within γ-TiAl (crystal structure L10) phase. Findings: Annealing leads to precipitation of α2 and τ(crystal structure B82) particles at the grain boundaries at the expense of the α2 laths. This process is connected with a depletion of the grain boundaries of Ti and Ta and formation of Al rich γ phase. Lattice parameter a of the γ phase decreases, c increases and aspect ratio c/a increases with increasing time and temperature of ageing. Research limitations/implications: The annealing leads to an increase of lattice parameters a and c and decrease of the aspect ratio c/a of both α2 and τ phases. Originality/value: This work present the effect of long-term annealing on microstructure stability and lattice parameters of coexisting phases in this alloy at temperatures ranging from 700 to 800ºC.

7

Zmiany poziomu hałasu podczas badań zużyciowych lekkich zaworów rozrządu silnika spalinowego

Siczek K.

Autobusy : technika, eksploatacja, systemy transportowe

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2013

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R. 14, nr 3

33-38

PL

W artykule przedstawiony został schemat stanowiska do badań zużyciowych zaworów rozrządu silnika spalinowego. Badaniom poddane zostały lekkie zawory wykonane ze stopu TiAl. Grzybki tych zaworów współpracowały z gniazdami wykonanymi z żeliwa stopowego i z brązu fosforowego. Trzonki zaworów współpracowały z prowadnicami wykonanymi z żeliwa stopowego. Podczas badań mierzono miedzy innymi zmiany poziomu hałasu w okresie do 500000 cykli. Celem było porównanie zmierzonych wartości poziomu hałasu dla dwóch różnych skojarzeń zaworów i gniazd. Obciążenie zaworów było zrealizowane przy pomocy układu sprężyn. Ruch zaworów był wymuszany przy pomocy wałka krzywkowego, natomiast ich ruch powrotny był zapewniony przy pomocy sprężyn zaworowych. Prędkość wałka krzywkowego, napędzanego od silnika elektrycznego na stanowisku badawczym, była stała. Zaobserwowano większy średni poziom mierzonego hałasu i większy jego rozrzut podczas współpracy zaworów z gniazdami z żeliwa w porównaniu z gniazdami wykonanymi z brązu fosforowego podczas jednakowych serii badawczych.

EN

The scheme of tester for wear studies of valves operating in combustion engine has been presented in this article. The tests have been subjected to lightweight valves made of TiAl alloy. Valve heads have mated with valve guides made of cast iron or phosphor bronze. Valve stems have mated with valve guides made of cast iron. During the study it has been measured, among others, changes in sound level up to 500,000 cycles. The aim has been to compare the measured values of sound level for two different sets of valves and their seat inserts. Valve loading has been realized by the set of springs. Valves have been forced to move by a roller cam, and the return movement has been provided with a valve spring. Rotating speed of the camshaft, driven by an electric motor on the stand, has been constant. It has been observed the higher average value of the measured sound level and the greater value of its standard deviation in case of the valve mated with a seat insert made of cast iron comparing to the case of seat insert made of phosphor bronze during the same research series.

8

Microstructure and properties of Ti-45Al-5V intermetallic alloy

Dymek S., Wróbel M., Witczak Z., Blicharski M.

Materials Science Poland

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2009

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Vol. 27, No. 3

865--873

EN

An alloy of the chemical composition Ti-45Al-5V (at. %) was synthesized by mechanical alloying in a Szegvari-type attritor from elemental powders of high purity. The powders were further consolidated by hot isostatic pressing and hot isostatic extrusion. The resulting material was composed of a mixture of TiAl- and Ti3Al-based phases. However, no lamellar microstructure, typical of such alloys, was observed. The alloys exhibited exceptionally high yield strength, together with satisfactory ductility and fracture toughness. The high strength was unequivocally due to grain refinement and the presence of oxide dispersoid.

9

Fabrication and characterization of TiAl/Ti3Al-based intermetallic composites (IMCs) reinforced with ceramic particles

Kevorkijan V., Škapin S.

Archives of Materials Science and Engineering

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2009

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Vol. 40, nr 2

75-83

EN

Purpose: The purpose of the paper is to fabricate and characterise TiAl/Ti₃Al-based intermetallic composites (IMCs) reinforced with ceramic particles. Design/methodology/approach: Composites were formulated by blending commercially available powders of either TiAl or Ti₃Al (technical grade with traces of Al and Ti) with ceramic powders (B₄C, TiC or TiB₂) in appropriate amounts to create titanium aluminide-based matrices with 10, 20, 30, 40 and 50 vol. % of B₄C, TiC or TiB₂ discontinuous reinforcement. The powder blends were thoroughly mixed and subsequently cold compacted. Findings: Qualitative metallographic analysis of the as-densified microstructures confirmed that during densification of the composite matrix both TiAl and Ti₃Al single phase titanium aluminide powders were transformed into various intermetallic phases (TiAl, Ti₃Al and TiAl₃). Regarding the room temperature tensile properties, excellent tensile strength, tensile yield strength and Young's modulus were measured in all fully dense composite samples, irrespective of their phase composition and volume fraction of reinforcement. Research limitations/implications: Generally, the improvement of tensile strength, tensile yield strength and Young's modulus was found to be correlated with increase in the amount of ceramic reinforcement in the matrix. However, quite the opposite behaviour was found regarding elongation, where the introduction of ceramic particles into the intermetallic matrix led in all specimens to a significant reduction of elasticity. Originality/value: In all systems and compositions, fully dense composite samples (with a retained porosity less than 1 vol. %) were successfully obtained, revealing the significant industrial potential of this fabrication method.

10

Fabrication and characterization of TiAl/Ti3Al-based intermetallic composites (IMCs) reinforced with ceramic particles

Kevorkijan V., Skapin S. D.

Archives of Materials Science

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2008

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Vol. 29, nr 4

168-183

EN

Purpose: The purpose of the paper is to fabricate and characterise TiAl/Ti3Albased intermetallic composites (IMCs) reinforced with ceramic particles. Methodology: Composites were formulated by blending commercially available powders of either TiAl or Ti3Al (technical grade with traces of Al and Ti) with ceramic powders (B4C, TiC or TiB2) in appropriate amounts to create titanium aluminide-based matrices with 10, 20, 30, 40 and 50 vol. % of B4C, TiC or TiB2 discontinuous reinforcement. The powder blends were thoroughly mixed and subsequently cold compacted. Findings: Qualitative metallographic analysis of the as-densified microstructures confirmed that during densification of the composite matrix both TiAl and Ti3Al single phase titanium aluminide powders were transformed into various intermetallic phases (TiAl, Ti3Al and TiAl3). Regarding the room temperature tensile properties, excellent tensile strength, tensile yield strength and modulus were measured in all fully dense composite samples, irrespective of their phase composition and volume fraction of reinforcement. Research: Generally, the improvement of tensile strength, tensile yield strength and Young’s modulus was found to correlate with the increase in the amount of ceramic reinforcement in the matrix. However, quite the opposite behaviour was found regarding elongation, where the introduction of ceramic particles into the intermetallic matrix led in all specimens to a significant reduction of elasticity. Value: In all systems and compositions, fully dense composite samples (with a retained porosity less than 1 vol. %) were successfully obtained, revealing the significant industrial potential of this fabrication method.

11

The relationship between specific heat capacity and oxidation resistance of TiAl alloys

Przeliorz R., Goral M., Moskal G., Swadzba L.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 21, nr 1

47-50

EN

Purpose: The results of the measuring of the specific heat capacity of the TiAl-based alloys with the addition of Cr and Nb, in temperatures ranging from 150 to 1000 degrees centigrade. Design/methodology/approach: The measurements of the specific heat capacity have been conducted using differential scanning calorimetry method (DSC) on Setaram calorimeter. The samples, sized 15 x 9 x 1,1 mm, have been oxidized in varied thermal conditions, according to the following scheme: 2 min. of heating up to 950 degrees centigrade, 50 min. of annealing at the given temperature, 8 min. of cooling until room temperature (25 degrees centigrade) was reached. Findings: The heat resistance of the alloys under the conditions of cyclic oxidation in 950 degrees centigrade has been specified. Up to 800 degrees centigrade, the course of the cp curves agrees with Debaye model. Above 800 degrees centigrade, an anomaly, involving the fast increase of the cp value, can be noticed. Research limitations/imlications: Results of investigation can explain relationship between specific heat capacity and oxidation resistance of different TiAl alloy. Originality/value: The presence of the Nb2O5 phase in the scale has been proved to spur the increase of the oxidation process.

12

Selected properties of the aluminium alloy base composites reinforced with intermetallic particles

Adamiak M.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 14, nr 1-2

43--47

EN

Purpose: The main aim of this work is to investigate two types of intermetallics TiAl and Ti3Al as reinforcement and their influence on selected properties and microstructure of aluminium matrix composites. Design/methodology/approach: Aluminium matrix composites were produced employing the atomised aluminium alloy AA6061 as metal matrix, when as reinforcement TiAl and Ti3Al intermetallics particles were used. The powders were cold pressed and then hot extruded. To evaluate the effect of mechanical milling two types of ball mills were used: a low energy (horizontal ball mill) and a high energy one (eccentric ball mill). Reinforcement contents for both processes 5, 10, 15 % by weight. To determine hardness Vickers tests were performed. Microstructure observations were made by optical microscopy and scanning electron microscopy SEM. Findings: Based on the examinations carried out one can state that the mechanical milling can produce composites powders with homogenous distribution of reinforcement particles. The mechanically milled and extruded composites show finer and better distribution of reinforcement particles what leads to better mechanical properties of obtained products. Research limitations/implications: In order to evaluate with more detail the possibility of applying these composite materials at practical application, further investigations should be concentrated on the interface reaction of the matrix and reinforcing particles during elevated temperature exposition and their influence on mechanical properties. Practical implications: The composites materials produced by this way have shown significant improvement of the mechanical properties in comparision with matrix materials. Good properties of the composites make them suitable for various technical and industrial applications. Originality/value: It should be stressed that the materials as intermetallic compounds with outstanding mechanical properties and good thermal stability were developed making them a powerful material to be used in this kind of composites as the alternative for the reinforcements usually investigated and utilized to the composites materials production - alumina or silicon carbide.

13

Effect of alloy additions on processing of TiAl-5%X (X=Cr, V, W) intermetallics by mechanical alloying

Dymek S., Wróbel M., Blicharski M.

Archives of Metallurgy and Materials

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2006

|

Vol. 51, iss. 1

103-107

EN

Alloys with chemical compositions TiAl48, TiAl45Cr5, TiAl45V5 and TiAl45W5 were synthesized by mechanical alloying in a Szegvari-type attritor from elemental powders of high purity. The presence of a third element (V, Cr, W) influenced the mechanical alloying process of -TiAl alloys. The prolong milling (100 h) of TiAl45V5 alloy led to its complete amorphisation; the milling of the TiAl45Cr5 alloy in the same conditions led also to its amorphisation but Cr(Ti, Al) solid solution was also present. Tungsten, on the other hand, did not form solid solutions. Instead, it underwent heavy refinement during milling and as a consequence, constitute a dispersoid in the consolidated material. It was shown that amorphisation of powders is preceded by formation of nanocrystalline structure in the milled powder particles in early stages of milling (6 h).

PL

Wpracy wytworzono i badano stopy o następujących składach chemicznych: TiAl48, TiAl45Cr5, TiAl45V5 oraz TiAl45W5 (% at.). Mechaniczną syntezę tych stopów przeprowadzono w laboratoryjnym atritorze typu Szegvari z udziałem proszków czystych metali. Stwierdzono, że obecność dodatku stopowego (Cr, V, W) znacząco wpływa na przebieg procesu mechanicznego wytwarzania stopów. Długotrwałe mielenie (100 godz.) doprowadziło do całkowitej amorfizacji stopu TiAl45V5; mielenie proszków stopu TiAl45Cr5 w tych samych warunkach również prowadziło do amorfizacji, a ponadto do utworzenia roztworu stałego na osnowie Cr. Wolfram nie tworzył roztworów stałych, lecz ulegał silnemu rozdrobnieniu i w konsekwencji w materiale litym występował w postaci dyspersoidu. Wykazano, ze amorfizacja proszków była poprzedzona utworzeniem struktury nanokrystalicznej w cząstkach proszków już w początkowym stadium mielenia (6 godz.).

14

Effect of 5 at.% addition of Cr, V and W on microstructure and mechanical properties of γ-TiAl based alloys

Dymek S., Wróbel M., Blicharski M., Witczak Z.

Archives of Metallurgy and Materials

|

2006

|

Vol. 51, iss. 1

97-102

EN

Alloys with chemical compositions TiAl48, TiAl45Cr5, TiAl45V5 and TiAl45W5 were synthecised by mechanical alloying. The compaction of powders was perform by hot pressing (pressure sintering) at 1300C and pressure 25 MPa or by hot isostatic pressing at pressure of 1.4 GPa. Hot isostatic pressing produced alloys with exceptionally high yield strength approaching 2.5 GPa along with satisfactory ductility and fracture toughness. On the other hand, the consolidation of powders at low pressure turned out to be not an adequate compaction method for the produced alloys. The produced alloys were formed mostly by the expected phases ( and 2-based ones), however, their chemical composition departed from stoichiometry.

PL

Wpracy wytworzono i badano stopy o następujących składach chemicznych: TiAl48, TiAl45Cr5, TiAl45V5 oraz TiAl45W5 (% at.). Jako metodę wytwarzania wybrano mechaniczną syntezę proszków czystych metali. Konsolidacje proszków przeprowadzono poprzez prasowanie na goraco (spiekanie pod ciśnieniem) w temperaturze 1300C i przy ciśnieniu 25 MPa oraz przez izostatyczne prasowanie na gorąco przy ciśnieniu 1,4 GPa. Stopy poddane izostatycznemu prasowaniu na gorąco wykazywały wyjątkowo dużą granicę plastyczności dochodzącą do 2,5 GPa przy zachowaniu zadowalającej ciągliwości i odporności na pękanie. Prasowanie na gorąco przy małym ciśnieniu prowadziło do wytworzenia stopów o znacznie gorszych właśiwościach. Produkowane stopy zbudowane były zgodnie z oczekiwaniami z faz na osnowie Wpracy wytworzono i badano stopy o nastepujacych składach chemicznych: TiAl48, TiAl45Cr5, TiAl45V5 oraz TiAl45W5 (% at.). Jako metode wytwarzania wybrano mechaniczna synteze proszków czystych metali. Konsolidacje proszków przeprowadzono poprzez prasowanie na goraco (spiekanie pod cisnieniem) w temperaturze 1300C i przy cisnieniu 25 MPa oraz przez izostatyczne prasowanie na goraco przy cisnieniu 1,4 GPa. Stopy poddane izostatycznemu prasowaniu na goraco wykazywały wyjatkowo duza granice plastycznosci dochodzaca do 2,5 GPa przy zachowaniu zadowalajacej ciagliwosci i odpornosci na pekanie. Prasowanie na goraco przy małym cisnieniu prowadziło do wytworzenia stopów o znacznie gorszych własciwosciach. Produkowane stopy zbudowane były zgodnie z oczekiwaniami z faz na osnowie γ i α2, lecz ich skład chemiczny odbiegał od składów stechiometrycznych.

15

Synteza materiałów międzymetalicznych w układzie Ti-Al

Chlubny L., Lis J.

Materiały Ceramiczne

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2002

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R. 54, nr 2

58-61

PL

Związki międzymetaliczne z układu Ti-Al stanowią interesującą grupę materiałów, które znajdują zastosowanie jako materiały żaroodporne, jak również stanowić mogą substraty do syntezy bardziej złożonych związków takich jak nanolaminaty typu 312 czy H. W prezentowanej pracy opracowano metodę otrzymywania drobnoziarnistych, jednofazowych związków TiAl, Ti2Al, Ti3Al otrzymywanych na drodze samorozwijającej się syntezy wysokotemperaturowej SHS. Otrzymane materiały zostały zbadane metodą dyfrakcji rentgenowskiej XRD, oraz przeprowadzono obserwację morfologii za pomocą skaningowego mikroskopu elektronowego SEM.

EN

The compounds from Ti-Al system are very interesting materials which can be applied as a high-temperature materials. They can be also used as a substrates to synthesize more complex compounds such as nanolaminates of 312 or H type. In a presented work a method of obtaining singlephase compounds of TiAl, Ti2Al, Ti3Al derived on the way of selfpropagating high-temperature synthesis (SHS) was shown. All of the obtained materials were analyzed by an XRD method and their morphology were investigated by SEM method.

16

Stopy na osnowie faz międzymetalicznych TiAl

Garbacz H.

Zeszyty Naukowe Politechniki Świętokrzyskiej. Mechanika

|

2000

|

Z. 72

235-240

PL

W pracy badano właściwości mechaniczne i trybologiczne oraz odporność na wysokotemperaturowe utlenianie stopu Ti3AlNb. Stwierdzono, że dodatek niobu do międzymetalicznego stopu Ti3Al poprawia jego odporność na utlenianie. Pozwala również na otrzymanie struktur różniących się składem fazowym i właściwościami. Badany materiał wykazywał większą odporność na zużycie ścierne od międzymetalicznych stopów na bazie Ni3Al.

EN

Modification of the chemical compsition of the Ti3Al alloy by niobium give increase of the resistance to oxidation. Moreover, the trybological properties of the intermetallic alloy Ti3AlNb are better to Ni3Al alloys.