Factors influencing abrasive wear of gas detonation sprayed FeAl - based intermetallic coatings

• Autorzy: Senderowski C. , Bojar Z.
• Konferencja: Third International Tribology Conference ITC 2004
• Języki publikacji: EN

Abstrakty

EN

Gas detonation sprayed (GDS) intermetallic coatings made of Fe-Al phases are expected to be resistant to abrasive wear and may find tribological use in aggressive environments and / or at elevated temperature. Powder mixtures of Fe-Al type intermetallic phases were gas detonation sprayed on a plain carbon steel substrate to obtain protective coatings. It has been found that layered coatings structure consists of FeAl, Fe3Al and FeAl2 phases mixture with minimal content of pores. Metallographic examination of chemical and phase compositions of GDS coatings were carried out with Philips XL-30 scanning microscope integrated with DX4i - EDAX. The porosity of coatings was measured by quantitative metallography method using SIS image analyser integrated with SEM. Phase analysis of GDS coatings was performed by X-ray diffraction (XRD). Abrasion wear resistance of the GDS coatings was evaluated in tribological tests with plane - backward motion of the intermetallic coating - cast iron counter body couples. It has been found that layered structure of coating based on FeAl solid solution gives a wide range of possibilities of chemical composition changes. It has an influence on a high level of hardening, low porosity and a good adhesion of the coating. A significant difference has been observed between Fe-Al based GDS intermetallic coatings, bulk Fe3Al intermetallic alloy and alloyed cast iron behaviour during abrasion tests. The weight loss of investigated GDS coatings was about twenty five times lower than obtained for a bulk intermetallic sample and much more lower in comparison to alloyed cast iron tested under the same conditions. Finally, it was stated that high mean value of microhardness (700-800HV 0,1), lamellar microstructure, different level of aluminium and oxygen content in intermetallic phases, a small amount of Al2O3 oxide particles, high compressive stress and very low porosity were main factors determining very high abrasive wear resistance of Fe-Al based GDS intermetallic coatings.

Słowa kluczowe

EN

intermetallic coatings; gas detonation spraying

PL

materiałoznawstwo; detonacja; zużycie ścierne; stal węglowa

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2004
• Tom: Vol. 9, no spec.
• Strony: 65--71
• Opis fizyczny: Bibliogr. 9 poz., rys., wykr.

Twórcy

autor

Senderowski C.

• Military University of Technology, Institute of Materials Science and Applied Mechanics 2 Kaliskiego Str., 00-908 Warsaw 49, POLAND

autor

Bojar Z.

• Military University of Technology, Institute of Materials Science and Applied Mechanics 2 Kaliskiego Str., 00-908 Warsaw 49, POLAND

Bibliografia

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