用机械合金化及热压法制备块体细晶Ni-20Cr合金,并研究其在900℃,涂75mass%Na2SO4+25mass%K2SO4盐膜后的热腐蚀行为.结果表明,机械合金化Ni-20Cr合金在900℃热腐蚀时,表面形成了单一连续的Cr2O3外氧化膜,有效阻止了硫的向内扩散,延长了热腐蚀的孕育期,呈现出较熔炼粗晶N-20Cr合金更好的抗热腐蚀性能.
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