摘要
采用机械合金化法制备了两相颗粒极细的Ｃｕ－２０Ｃｒ与Ｃｕ－４０Ｃｒ合金，研究其在７００～８００℃，０．１ＭＰａ纯氧气中的氧化．ＭＡＣｕ－２０Ｃｒ及ＭＡＣｕ－４０Ｃｒ合金２４ｈ氧化后均形成了连续的Ｃｒ２Ｏ３层，这主要由于两相颗粒的细化，加快了Ｃｒ颗粒的溶解，缩短了Ｃｒ的扩散距离，从而有效地促进Ｃｒ２Ｏ３层的形成．
The oxidation behavior of Cu-Cr alloys with Cr concentrations 20% (mass) (MACu-20Cr) and 40% (MACu-40Cr) was studied in 0.1 MPa O2 at 700 ~ 800℃. The Cu-Cr alloys were prepared by mechanical alloying, presenting a much smaller particle size of phases. Both MA Cu-20Cr of MACu-40Cr formed a continuous Cr2O3 layer. The result is connected with the fact that the smaller Cr-rich particles dissolve more rapidly ,have short diffusion distance between Cr-rich phase particles, and can provide a faster supply of Cr to the external Cr2O3 scales with respect to larger particles.
出处
《中国腐蚀与防护学报》
CAS
CSCD
2000年第5期269-273,共5页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金资助(No.59871050和No.59725101)
