[G] Heat Resistant Materials

[189] The Mechanism Behind the Improved Oxidation Resistance of Ni-Al Alloy Using CaO Crucible

*Chihiro TABATA^1,2, Kyoko KAWAGISHI¹, Jun UZUHASHI¹, Tadakatsu OHKUBO¹, Tadaharu YOKOKAWA¹, Hiroshi HARADA³, Shinsuke SUZUKI² (1. NIMS, 2. Waseda University, 3. NIMS (Present: Superalloy Design Laboratory))

Keywords:耐酸化性、CaO、Ni-Al

Ni-Al合金をAl₂O₃およびCaOるつぼ溶解を行い，合金の耐酸化性の違いを比較した．また，CaOるつぼ溶解材にて検出されるCaS介在物の結晶構造を同定し，耐酸化性向上メカニズムを解明した．