The Study on TiAl Alloy Powders with Different Density by Low Temperature Diffusion Synthesis

Abstract:

In this paper, the fabrication of TiAl alloy powders by high-energy ball milling and heat preservation at low temperature and high vacuum using titanium powders of 30 micron and aluminum powders in the size of 9-12 micron. After being heated under the different time and temperature, the alloying of milled and heated powders of titanium and aluminum were investigated. The results show that the alloy powders with the main intermetallic compounds of TiAl and a small quantity of aluminum tri- titanium can be obtained through one hour high-energy ball milling and preserving heat 2 hours at 500°C, 3 hours at 600 °C in high vacuum. Furthermore, the transitional alloy phase Al2Ti was formed at 550 °C~600 °C, and it has an effect on the density of Ti-Al alloy powders in the diffusion synthesis. The fabrication of TiAl alloy powders with different density by sintering diffusion at low temperature and high vacuum is effective.

• Periodical: Advanced Materials Research (Volumes 554-556)
• Pages: 507-510
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.554-556.507
• Online since: July 2012
• Authors: Jun Wang, Hui Ping Shao, Zhi Meng Guo
• Keywords: Diffusion Reaction, High Vacuum, Intermetallic Compound (IMC), Low-Temperature, TiAl Alloy Powders

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