Microstructural characteristics and elevated temperature wear of Ti-11Si-16Al alloy

Autor:	Yongzhong Zhan, Zhengwen Yu, Haofeng Xie, Linbin He, Ying Wang, Jianbo Ma
Rok vydání:	2008
Předmět:	Materials science Metallurgy Alloy Metals and Alloys Oxide Sintering engineering.material Tribology Condensed Matter Physics Hot pressing Microstructure chemistry.chemical_compound chemistry Materials Chemistry engineering Physical and Theoretical Chemistry Solid solution Eutectic system
Zdroj:	International Journal of Materials Research. 99:75-83
ISSN:	2195-8556 1862-5282
DOI:	10.3139/146.101602
Popis:	The microstructural characteristics and elevated temperature wear behavior of a Ti-11Si-16Al alloy have been investigated, compared with the as-cast Al-free Ti – Si eutectic alloy. Experimental results show that addition of 16 at.% Al greatly modifies the microstructure by forming near-equiaxed Ti5Si3, rod-like Ti3Al and rosette-like eutectic cells distributing on a continuous α-Ti (Al, Si) solid solution phase. Therefore, mechanical properties such as Vickers' hardness, elastic modulus and strength are significantly improved. In-situ hot pressing and sintering of the hybrid oxide particles form a compact-and-hard glaze layer on the worn surface of the alloy. It has protective effects on the Ti-11Si-16Al specimen by relieving oxygen diffusion, alleviating rubbing of the counterpart and providing a solid lubricant effect with the hybrid oxide particles. This effectively improves the elevated temperature wear resistance and friction stability.
Databáze:	OpenAIRE
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