Abstract
This study was to investigate the influence of aluminum content on the properties of sintered Ti-Al alloy. The alloys were added from 2.5 wt% to 15.0 wt% aluminum powder to titanium powder. The effect of added aluminum powder on the properties of sintered compacts was investigate by measurement of thermal expansion curves, density of green and sintered state, compressive yield strength and sintered shrinkage.
Experimental results were as follows.
1. Ti-Al green compacts exhibited abnormal expansion at approximately the melting point of aluminum. Maximum expansion of these compacts increased remarkably with aluminum content. Final sintered shrinkage decreased substantially as the aluminum content increased. When -250mesh Ti powder was used, the expansion ocurred in the case of over 7.5 wt% aluminum powder contents,
2. The compressive yield strength of Ti-Al sintered compacts was maximum at 7.5 wt% aluminum powder content.
The findings show that the fitness of sintered titanium alloy prosthetics can be improved.
