PL
 |
EN
Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 13

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote Comparison of the CrN and TiN/(Ti,Al)N PVD coatings onto plasma nitrited steel
100%
Polok-Rubiniec M. , Dobrzański L.
|
2012
|
tom Vol. 54, nr 2
78-85
EN
Purpose: The paper presents the results of the mechanical and tribological properties of the CrN and TiN/(Ti,Al)N PVD coatings deposited onto plasma nitrided hot work tool steel X37CrMoV5-1 type. Design/methodology/approach: Tests of the coatings’ adhesion to the substrate material were made using the scratch test. The surfaces’ topography, structure of the PVD coatings were observed on the scanning electron microscopy. Wear resistance tests with the pin-on-disc method were carried out on the CSEM THT (High Temperature Tribometer). Findings: The results showed that the duplex TiN/(Ti,Al)N coating exhibited higher hardness, very good adhesion and better wear resistance in the elevated temperature as compared to the duplex CrN coating. Practical implications: The investigation results will provide useful information to applying the duplex PVD coatings for the improvement of mechanical properties of the hot work tool steels. Originality/value: The very hard and antiwear PVD coatings deposited onto hot work tool steel substrate are needed.
2
Content available Polypropylene matrix composite with charcoal filler
100%
Polok-Rubiniec M. , Włodarczyk-Fligier A.
|
|
tom Vol. 103, nr 2
60--66
EN
Purpose: The aim of the article is to present the thermal, electrical and mechanical properties of the produced polymer composites with a filler in the form of charcoal powder. Design/methodology/approach: The tests were carried out on samples of pure polypropylene (PP) and polymer composites, the matrix of which is polypropylene (PP), and the filler was charcoal powder with a volume fraction of 10%, 20%, 30%, 40% and 50%. The tested polymer composites in the form of granules were produced by extrusion, and then standardised test profiles were made by injection moulding. Findings: The hardness of the tested composites was determined by the Shore D method, the grain size distribution of the filler used was determined using the laser method and its thermal stability was tested using the TGA thermogravimetric analysis. The volume and surface resistivity were also determined and the density was determined. It was found that the charcoal powder used as a filler is characterised by high thermal stability - up to 600°C - and with an increase in its volume share in the polymer matrix, the hardness and density of the produced composites increases. Practical implications: The tested composites can be used as structural composites for complex elements requiring high hardness and strength. Originality/value: The research results indicate the possibility of using charcoal as a filler in polymer matrix, which, due to its low production cost, may be an alternative to expensive carbon fillers.
3
Content available Polypropylene-Matrix Polymer Composites with Natural Filler
85%
Włodarczyk-Fligier A. , Polok-Rubiniec M. , Chmielnicki B. , Włodarczyk-Fligier A. , Polok-Rubiniec M. , Chmielnicki B.
|
4
Content available Thermal analysis of matrix composite reinforced with Al2O3 particles
80%
Włodarczyk-Fligier A. , Polok-Rubiniec M. , Konieczny J.
|
2020
|
tom Vol. 100, nr 1
5--11
EN
Purpose: The aim of this paper is to present a modern manufacturing method of production and compare the thermal, mechanical, properties of composite materials with aluminium alloy matrix reinforced by Al2O3 particles. Design/methodology/approach: The material for investigation was manufactured by the method of powder metallurgy (consolidation, pressing, hot concurrent extrusion of powder mixtures of aluminium EN AW-AlCu4Mg1 (A) and ceramic particles Al2O3). The amount of the added powder was in the range of 5 mass.%, 10 mass.% and 15 mass.%. Findings: The received results concerning the enhancement of hardness, which show the possibility of obtaining the MMC composite materials with required microstructure, influencing the properties of the new elaborated composite materials components. Concerning the thermal properties, especially the linear thermal expansion coefficient was measured, as well as the dilatometric change of the sample length was analysed. Practical implications: Concerning practical implications it can be stated that the tested composite materials can be applied among others in the transportation industry, but it requires additional research. Originality/value: The received results show the possibility of obtaining new composite materials with controlled and required microstructure with possible practical implications.
5
Content available Application of anodization process for cast aluminium surface properties enhancement
80%
Włodarczyk-Fligier A. , Labisz K. , Polok-Rubiniec M. , Konieczny J.
|
|
tom Vol. 61, iss. 3
1351--1356
EN
An huge interest is observed in last years in metal matrix composite, mostly light metal based, which have found their applications in many industry branches, among others in the aircraft industry, automotive-, and armaments ones, as well as in electrical engineering and electronics, where one of the most important issue is related to the corrosion resistance, especially on the surface layer of the used aluminium alloys. This elaboration presents the influence of ceramic phase on the corrosion resistance, quality of the surface layer its thickness and structure of an anodic layer formed on aluminium alloys. As test materials it was applied the aluminium alloys Al-Si-Cu and Al-Cu-Mg, for which heat treatment processes and corrosion tests were carried out. It was presented herein grindability test results and metallographic examination, as well. Hardness of the treated alloys with those ones subjected to corrosion process were compared.
6
Content available Polypropylene-Matrix Polymer Composites with Natural Filler
80%
Włodarczyk-Fligier A. , Polok-Rubiniec M. , Chmielnicki B.
|
|
tom Vol. 66, iss. 1
313--319
EN
Polymer composite materials based on the Moplen HP400R polypropylene matrix with a filler from walnut shell flour with 30, 40 and 50% content and 200-315 μm and 315-443 μm fraction were produced by the injection method. The effect of filler content was analysed on the processing properties of the composites such as: MFR Melt Flow Rate and the MVR Melt Volume-flow Rate, as well as the temperature of the filler flour decomposition using the TGA thermogravimetric analysis method. The following was also determined: density, hardness, tensile strength and stiffness modulus of elasticity of the materials in question. The obtained composite material was characterised by low density, which increased with the rising filler content. It was found that the applied natural filler has increased the hardness and stiffness modulus of the composite and decreased the tensile strength.
7
Content available Influence of aluminium alloy anodizing and casting methods on structure and functional properties
80%
Konieczny J. , Labisz K. , Polok-Rubiniec M. , Włodarczyk-Fligier A.
|
|
tom Vol. 61, iss. 3
1337--1342
EN
This paper presents the influence of casting method and anodic treatment parameters on thickness and structure of an anodic layer formed on aluminium alloys. As test materials was used the aluminium alloy AlSi9Cu3, which was adopted to the casting process and anodic treatment. In this paper are presented the wear test results and metallographic examination, aswell as hardness of non-anodised and anodised alloys subjected to anodising process.The investigations were performed using light and electron microscopy (AFM) for the microstructure determination. The morphology and size of the layer was also possible to determine. The anodising conditions for surface hardening and itsinfluence on properties was analysed. The structure of the surface laser tray changes in a way, that there is a different thicknessof the produced layer. The aluminium samples were examined in terms of metallography using the optical microscope withdifferent image techniques as well as light microscope. Improving the anodization technology with appliance of differentanodising conditions. Some other investigation should be performed in the future, but the knowledge found in this researchconcerning the proper process parameters for each type of alloy shows an interesting investigation direction. The combinationof metallographic investigation for cast aluminium alloys - including electron microscope investigation - and anodisingparameters makes the investigation very attractive for automobile industry, aviation industry, and others, where aluminium alloys plays an important role.
8
Content available remote Comparison of the PVD coatings deposited onto hot work tool steel and brass substrates
80%
Polok-Rubiniec M. , Lukaszkowicz K. , Dobrzański L. A. , Adamiak M.
|
|
tom Vol. 24, nr 2
195-198
EN
Purpose: The aim of the research is the investigation of the structure and mechanical properties of monolayers CrN, TiN and multilayers TiN/TiAIN and Ti/TiAIN coatings deposited by PVD techniques onto the substrate from the X37CrMoV5-1 steel and CuZn40Pb2 brass. Design/methodology/approach: The microhardness tests were made on the dynamic ultra-microhardness tester. Tests of the coatings' adhesion to the substrate material were made using the scratch test. The wear and friction tests were performed on a standard pin-on-disc device. Findings: The monolayer PVD coatings deposited onto hot work steel and brass substrate demonstrate the high hardness, adhesion and wear resistance. The critical load LC2, which is in the range 32-60 N, depends on the coating and substrate type. The friction coefficient for the investigated coatings is within the range of 0.33-0.75. Practical implications: The investigation results will provide useful information to applying the PVD coating for the improvement of mechanical properties of the hot work tool steels and brass substrates. Originality/value: It should be stressed that the mechanical properties of the PVD coatings obtained in this work are very encouraging and therefore their application for products manufactured at mass scale is possible in all cases where reliable, very hard and abrasion resistant coatings, deposited onto tools steel and brass substrate are needed.
9
Content available Microstructure and service properties of copper alloys
80%
Polok-Rubiniec M. , Konieczny J. , Labisz A. , Włodarczyk-Fligier A.
|
|
tom Vol. 61, iss. 3
1277--1282
EN
This elaboration shows the effect of combined heat treatment and cold working on the structure and utility properties of alloyed copper. As the test material, alloyed copper CuTi4 was employed. The samples were subjected to treatment according to the following schema: 1st variant - supersaturation and ageing, 2nd variant - supersaturation, cold rolling and ageing. The paper presents the results of inicrostructure, hardness, and abrasion resistance. The analysis of the wipe profile geometry was realized using a Zeiss LSM 5 Exciter confocal microscope. Cold working of the supersaturated solid solution affects significantly its hardness but the cold plastic deformation causes deterioration of the wear resistance of the finally aged CuTi4 alloy.
10
Content available remote Evaluation of selected steel thermochemical treatment technologies using foresight methods
71%
Dobrzańska-Danikiewicz A. D. , Hajduczek E. , Polok-Rubiniec M. , Przybył M. , Adamaszek K.
|
|
tom Vol. 46, nr 2
115--146
EN
Purpose: The purpose of this article is to evaluate the development efficiency of classical steel thermochemical treatment. The criterion assumed for dividing the technologies into groups was the thermochemical treatment kind. Three technology groups were selected to realised researches, as follows: nitriding, carburising and diffusion boriding. Design/methodology/approach: In the framework of foresight-materials science researches: a group of matrices characterising technology strategic position was created, materials science experiments using: light microscope, transmission and scanning electron microscopes, X-ray diffractometer, microhardness tester, work-stands for testing of thermal fatigue resistance and mechanical fatigue strength, abrasion and corrosion resistance were conducted and technology roadmaps were prepared. Findings: The outcarried researches pointed out the great industrial importance of nitriding and carburising and good perspectives for these technology groups. However, diffusion boriding is obsolete and will slowly leave the market. Research limitations/implications: Researches concerning steel thermochemical treatment constitute a part of a larger research project aimed at identifying, researching, and characterizing the priority innovative technologies in the field of materials surface engineering. Practical implications: Nitriding and carburising with their popularity and good quality-price relation can be recommended for use in small and medium enterprises. Obsolete diffusion boriding is not recommended for that. Originality/value: The value of this paper is to evaluate the value of thermochemical treatment technologies in the background environment with their future development perspectives determination including the influence of thermochemical treatment on the quality, microstructure and properties of surface layers obtained by thermochemical treatment.
11
Content available Study of selected properties of PLA used in 3D printing
61%
Sośniak K. , Biela D. , Szalaty D. , Ścieszka M. , Polok-Rubiniec M. , Włodarczyk-Fligier A. , Kania A.
|
|
tom Vol. 116, nr 2
72--79
EN
Purpose: This study focuses on determining the best possible structure of the orthosis made with FDM 3D printing technology. To produce the samples, a thermoplastic PLA material was selected that met the conditions of biodegradability, biocompatibility and non-toxicity. The samples produced were subjected to a tensile strength test and corrosion resistance. Design/methodology/approach: Studies based on FEM analysis were carried out using the advanced engineering software CAE - Inventor. The samples were designed in the CAD system, while the G-Code path was generated using the PrusaSlicer 2.5.0 program dedicated to the Prusa i3 MK3S+ printer, which was used to create the models. Surface morphology observations of PLA were carried out with a Zeiss SUPRA 35 scanning electron microscope (SEM). The static tensile test was performed on the Zwick/Roell z100 device based on the PN-EN ISO 527:1 standard. Electrochemical corrosion tests were carried out using the Autolab PGSTAT302N Multi BA potentiostat in Ringer solution at a temperature of 37ºC. Findings: The research allowed the appropriate structure of the orthosis made of PLA polymer material using 3D FDM printing technology. The static tensile test, SEM and corrosion tests confirmed the correct application of this material for the selected purpose. It was possible to determine that samples with holes of 10 mm had the highest strength properties. Due to the tensile tests, the average tensile strength of those samples was around 61 MPa. The corrosion parameters of PLA were determined using Tafel analysis. Research limitations/implications: The research methodology proposed in work can be used to study other biomedical materials. The results presented can be the basis for further tests in order to search for the best orthopaedic stabiliser. Originality/value: The innovative part of the article are three different versions of structures intended for making orthoses used in medicine.
12
Content available Application of Anodization Process for Cast Aluminium Surface Properties Enhancement
61%
Włodarczyk-Fligier A. , Konieczny J. , Labisz K. , Polok-Rubiniec M.
|
|
nr 3
13
Content available Influence of Mg Addition on Crystallisation Kinetics and Structure of the Zn-Al-Cu Alloy
51%
Krupiński M. , Król M. , Tański T. , Labisz K. , Krupińska B. , Polok-Rubiniec M.
|
|
nr 2
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.