TiB₂-TiC-CrB複合体の耐酸化性

抄録

The oxidation of TiB₂ added with Cr and C prepared by pressureless sintering at 1900°C was investigated TiB₂ containing Cr and C was heated at 800°C to 1100°C for 36h in air, and weight change was measured to estimate the oxidation resistance. The TiB₂ showed a good oxidation resistance at 800°C because of the surface film of TiO₂ (rutile) and B₂O₃ formed by oxidation, which formed a barrier as an oxidation resistant layer. The weight gain of a TiB₂ specimen at 800°C for 36h in air was about 1.8mg/cm², that of the Cr and C containing specimen was about 27mg/cm² at 1100°C for 36h.