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1
Content available remote Wpływ metody oraz warunków obróbki strumieniowo-ściernej na chropowatość powierzchni pod powłoki ochronne
Chudy R.
Mechanik
|
2013
|
R. 86, nr 3
212--214
PL
Przedstawiono wyniki badań powierzchni po obróbce strumieniowo- ściernej metodą wirnikową oraz metodą pneumatyczną. Wyznaczono zależności pomiędzy zmiennymi warunkami obróbki a wartościami parametrów chropowatości w aspekcie przygotowania powierzchni pod powłoki ochronne. Zaproponowano sposób efektywnego oczyszczania powierzchni ze stali S235JR i S650MC kulkami staliwnymi i kształtkami ceramicznymi.
EN
The article presents the results of investigation of the surface roughness produced by airless shot blasting and pneumatic shot blasting methods. The relationships between the working conditions of the surface roughness, in terms of surface preparation for protective coatings were determined. Conditions for efficient surface cleaning of S235JR and S650MC steels using hard cast balls and Al2O3 ceramic pellets are proposed.
2
Content available remote Stereometry specification of anodised and PVD coated surface of aluminium alloy
Konieczny J., Labisz K., Wieczorek J., Dobrzański L.
Archives of Materials Science and Engineering
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2009
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Vol. 38, nr 2
85-92
EN
Purpose: The aim of the work is to present the influence of casting method and anodic treatment parameters on properties, thickness and structure of an anodic layer with (PVD) physical vapour deposition method achieved TiN layer formed on aluminum casting alloys. Design/methodology/approach: Investigations were carried out on the laser profile measurement gauge MicroProf from company FRT, abrasive wear test was made with using ABR-8251 equipment delivered by TCD Teknologi ApS and microstructure investigations were made with using a light microscope equipped with an electronic camera configured with a computer on two casting aluminum alloys which both were founding by pressure die casting and gravity casting. Findings: The researches included analyze of the influence of geometry, roughness and abrasive wear resistant of anodic layer obtained on aluminum casts. The studied PVD coating deposited by cathodic arc evaporation method demonstrates high hardness, adhesion and wear resistance. Research limitations/implications: Contributes to research on anodic and PVD layer for aluminum casting alloys. Practical implications: Conducted investigations lay out the areas of later researches, especially in the direction of the possible, next optimization anodization process of aluminum casting alloys, e.g. in the range of raising resistance on corrosion. Originality/value: The range of possible applications increases staidly for example for materials used on working building constructions, elements in electronics and construction parts in air and motorization industry in the aggressive environment.
3
Content available remote Development of the laser method of multicrystalline silicion surface texturization
Dobrzański L., Drygała A., Panek P., Lipiński M., Zięba P.
Archives of Materials Science and Engineering
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2009
|
Vol. 38, nr 1
5-11
EN
Purpose: The aim of the paper is to demonstrate a laser method of multicrystalline silicon texturization. This means creating a roughened surface so that incident light may have a larger probability of being adsorbed into the solar cell. It was demonstrated, that laser processing is very promising technique for texturing multicrystalline silicon independent on crystallographic orientation of grains compared to conventional texturing methods. Design/methodology/approach: The topography of laser textured surfaces were investigated using ZEISS SUPRA 25 scanning electron microscope and LSM 5 Pascal ZEISS confocal laser scanning microscope. The reflectance of produced textures was measured by Perkin-Elmer Lambda spectrophotometer with an integrating sphere. Electrical parameters of manufactured solar cells were characterized by measurements of I-V illuminated characteristics under standard AM 1.5 radiation. Findings: The texturing of multicrystalline silicon surface using Nd:YAG laser makes it possible to increase absorption of the incident solar radiation. Laser processing is a promising method for texturization of multicrystalline silicon compared to conventional texturing methods applied in used technology of solar cells. Research limitations/implications: Laser processing introduce into the bulk of material some unwanted effects, having detrimental influence on the main parameters of processed silicon wafers. Solar cells manufactured from laser-textured multicrystalline silicon wafers demonstrate worse electrical performance than cells manufactured from the non-textured wafers after saw damage removal as well as wafers textured by etching in alkaline solutions. Chemical etching by means of potassium alkali made it possible to increase cell efficiency. Originality/value: Laser texturing has been shown to have great potential as far as its implementatnion into industrial manufacturing process of solar cell is concerned.
4
Content available remote Laser surface treatment of magnesium alloy with WC powder
Dobrzański L., Domagała J., Tański T., Klimpel A., Janicki D.
Archives of Materials Science and Engineering
|
2008
|
Vol. 30, nr 2
113-116
EN
Purpose: The aim of this work was to improve the surface layer cast magnesium alloy EN-MCMgAl6Zn1 by laser surface treatment. The purpose of this work was also to determine the laser treatment parameter. Design/methodology/approach: The laser treatment of an EN-MCMgAl6Zn1 magnesium alloy with alloying WC powders was carried out using a high power diode laser (HDPL). The resulting microstructure in the modified surface layer was examinated using scanning electron microscopy. Phase composition was determined by the X-ray diffraction method using the XPert device. The measurements of microhardness of the modified surface layer was also studied. Findings: The morphology of the alloyed zone are dendrites. Microhardness of laser surface melted layer was significantly improved as compared to alloy without laser treatment. Research limitations/implications: This investigation presents different speed rates feed by one process laser power and in this research was used one powder with the particle size over 5µm. Practical implications: The results obtained in this investigation were promising to compared other conventional processes. High Power Diode Laser can be used as an economical substitute of Nd:YAG and CO2 to improve the surface magnesium alloy by feeding the carbide particles. Originality/value: The originality of this work is applying of High Power Diode Laser for alloying of magnesium alloy using hard particles like tungsten carbide.
5
Content available remote Laser nitriding of the surface layer of Ti6Al4V titanium alloy
Filip R.
Archives of Materials Science and Engineering
|
2008
|
Vol. 30, nr 1
25-28
EN
Purpose: The purpose of this paper is modification of the surface layer of the Ti6Al4V titanium alloy microstructure and properties by laser remelting in nitrogen atmosphere. Design/methodology/approach: Laser treatment was performed on the samples in stream of nitrogen. Microstructure of laser treated layer was investigated by using Epiphot 300 optical microscope and Novascan 30 scanning electron microscope. Phase composition was determined using X-ray diffractometry. The roughness of surface of treated material was examined using topography scanning system T 8000 made by Hommelwerke GMBH. The Vickers hardness under load of 1.96 N was measured on the cross sections of surface layer. The wear properties of alloyed zone were tested on the testing machine T 08M using ‘pin on disc’ test. Findings: Laser remelting process has produced a surface layer consists of hard ceramics particles of TiN and Ti2N phases spaced in martensitic matrix. The hardness of surface layer increases clearly in comparison with untreated alloy due to formation of TiN and Ti2N particles and depends on the volume fraction of nitrides. Their maximum value of the hardness (1500 HV 0.2) occurs on the surface of laser treated zone. Wear resistance of laser nitrided layer increases considerably in relation to base alloy. Research limitations/implications: Research range was limited to microstructure, phase composition, hardness, fractography and wear resistance investigations. To estimate the influence of the laser nitriding process on corrosion resistance of the layer additional examinations will be performed in future research. Practical implications: Laser remelting of titanium alloy in nitrogen atmosphere makes possible to obtain coatings composed of ceramic particles spaced in metallic matrix characterised by high hardness and wear resistance. Originality/value: The range of investigation included microstructure, phase composition, hardness as well as fractographic estimation and wear properties enables analysis of laser nitriding process efficienty.
6
Laserowe oczyszczanie piaskowca gotlandzkiego z monitoringiem LIPS
Jankowska M., Śliwiński G.
Analityka : nauka i praktyka
|
2006
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nr 2
22-25
PL
Spektroskopia plazmy indukowanej wiązką laserową (LIPS) jest techniką analityczną użyteczną zarówno w analizie, jak i w konserwacji.
7
Content available remote Activity of metal surfaces pre-treatment by blasting
Bacova V., Draganowska D.
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
|
2002
|
z. 58 [193]
25-30
EN
Contribution deals with activity of new metallic surfaces valuation after mechanical pretreatment by blasting with various types of blasting means in connection with possible secondary influences, as well as quantify activity changes by reason of exposition of surfaces in exterior environs. The main aim of this contribution is to extend present knowledge about quantify expression of metallic surfaces activity for purposes consistent surface treatment by coating, where right activity significant affect of coatings adhesion.
8
Usuwanie oleju z powierzchni stałych - oddziaływanie międzyfazowe
Nalaskowski J.
Przegląd Komunalny
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2001
|
nr 9
98-100
PL
Zanieczyszczeniem powierzchni nazywamy substancję znajdującą się na powierzchni, która ze względów technologicznych lub ochrony środowiska jest niepożądana i powinna zostać usunięta. Zanieczyszczenie może mieć rozmiary molekularne (np. zaadsorbowane jony, cząsteczki lub atomy gazów, lub powierzchniowe domieszki np. metali lub węgla), lecz z reguły stanowi ono odrębną fazę (ciekłą lub stałą) znajdującą się na powierzchni oczyszczanej w postaci cząstek o różnych rozmiarach mniej lub bardziej ciągłego filmu.
9
Content available remote Strumieniowo-ścierne oczyszczanie powierzchni za pomocą suchego lodu (CO2)
Andziak J., Paździora J.
Ochrona przed Korozją
|
2001
|
nr 4
96-99
PL
Przedstawiono wady pneumatycznej obróbki strumieniowo-ściernej z użyciem ścierniw mineralnych oraz zalety stosowania do tego celu suchego lodu. Podano parametry procesu i właściwości suchego lodu oraz możliwe dziedziny zastosowań.
EN
Disadvantages of air blast cleaning methods that use mineral abrasives have been presented and compared with a new method using solidified carbon dioxide (dry ice). Process parameters, solidified carbon dioxide properties and possible fields of application have been presented.
10
Wysokociśnieniowe oczyszczanie powierzchni strumieniem wody
Andziak J.
Przegląd Mechaniczny
|
1999
|
nr 8
24-27
11
Content available remote Niekonwencjonalne sposoby oczyszczania i przygotowania powierzchni
Andziak J.
Ochrona przed Korozją
|
1999
|
nr 5
122-127
PL
Przedstawiono i omówiono niekonwencjonalne sposoby oczyszczania i przygotownia powierzchni takie, jak: hydrościerne oczyszczanie z użyciem rozpuszczalnych w wodzie materiałów ściernych, oczyszczanie powierzchni przy wykorzystaniu niskich temperatur, ciekłym CO2, wysokociśnieniowe oczyszczanie strumieniem wody, oczyszczanie powierzchni za pomocą promieniowania laserowego, ksenonowej lampy błyskowej, plazmy oraz pneumatyczne strumieniowo-ścierne oczyszczanie przy ciśnieniach sprężonego powietrza powyżej 0,7 MPa.
EN
The following inconventional surface cleaning and preparation methods are presented and described: wet blasting with soluble abrasives, cryogenic blast cleaning, surface cleaning with supercritical carbon dioxide, high and ultra-high pressure water jetting, cleaning with laser radiation, cleaning with xenon flashlamp. plasma cleaning, abrasive blast cleaning above 0,7 MPa.
12
Nowe sposoby oczyszczania powierzchni
Andziak J.
Informacja Instal
|
1998
|
Nr 9 (175)
24-28
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