Structure and properties of Ti-Ag alloys produced by powder metallurgy

Titanium alloys varying in the silver content (3.5 at.%; 5 at.%; 10 at.% or 20 at.%) were produced by means of powder metallurgy. The alloys displayed different phase structure. In alloys with the silver content of 3.5 at.% and 5 at.% the solid solution α-Ti was identified. In alloys with the higher silver content, i.e. 10 and 20 at.%, both the solid solution and the equilibrium phase Ti2Ag were observed, whereas in alloys with the highest silver content of 20 at.% there were also the equilibrium phase TiAg and fine silver identified. The Ti-20%Ag alloy had 80% lower compressive stress and 30% lower hardness compared to the Ti-10%Ag alloy. The alloy with 10% silver showed the best mechanical properties as well as the best surface wettability.