TiSi₂の調製およびその二三の性質について

抄録

Some basic properties of TiSi₂ as a refractory hard material have been investigated. TiSi₂ powder was prepared by arc melting in an argon atmosphere of pure titanium and silicon mixture and subsequent crushinged by ball-mill. This powder was then hot-pressed in vaccum. The specimens obtained were subjected to various tests, the results of which are summarized as follows: (1) The optimum temperature in hot-pressing of TiSi₂ was 1380°C. The density attained 99.8% of the theoretical value. (2) The oxidation resistance at 1100°C was 0.0005 g/cm²/day. (3) In general, the hardness in hot state decreases with rising temperature. For instance, it was 230 (HV) at 800°C. (4) The corrosion resistance was is good against hydrochloric acid and sulpheric acid, while it was not so good against nitric acid. (5) The thermal schock resistance of TiSi₂ was poor. (6) TiSi₂ was well wetted by Fe, Ni, Co. (7) Ag does not wet TiSi₂.