Abstract
Ti alloys were made in air by the resistance sintering method from mixtures of powders such as Ti-Mo, Ti-Cr and Ti-Al. The alloys resistance-sintered with high power input have high tensile strength, e.g., Ti-10%Mo, 106 kg/mm2; Ti-10%Cr, 80kg/mm2; Ti-6%A1, 70kg/mm2. Corrosion resistance against 10%HCl of the Ti-Mo alloy is slightly better than that of Ti, against 35%HCl and 10%H2SO4 is almost the same as that of pure Ti, and against 10%HNO3 is slightly inferior to that. Corrosion resistance against 10%HC1 and 10%H2SO4 of the Ti-Cr and Ti-Al alloys is much inferior to Ti and against 10%HNO3 is almost the same as that. From the results above mentioned, it was considered that Ti alloys which have high strength and high corrosion resistance against inorganic acid can be manufactured by the resistance sintering, if alloying elements are properly selected.
