溅射Ni16Co26Cr10Al纳米晶涂层的熔盐热腐蚀性能  

Hot corrosion resistance of a magnetron-sputter Ni16Co26Cr10Al nanocrystalline coating in molten salts

作　　者：周月波[1] 刘修超[1] 王永东[1] 孙俭锋[1] 陈洪玉[1] 

机构地区：[1]黑龙江科技学院材料科学与工程学院,黑龙江哈尔滨150027

出　　处：《哈尔滨工程大学学报》2008年第8期882-885,共4页Journal of Harbin Engineering University

基　　金：黑龙江省教育厅基金资助项目(10553080);黑龙江科技学院引进人才基金资助项目(06-13)

摘　　要：利用磁控溅射技术在铸造Ni16Co26Cr10Al合金上溅射了相同成份的纳米晶涂层,以研究晶粒化对高温合金抗高温腐蚀性能的影响.热腐蚀试验在900℃的75%Na2SO4+25%NaCl(质量分数)混合熔盐中进行.结果表明溅射Ni16Co26Cr10Al纳米晶涂层由于晶粒尺寸细小,促进了保护性氧化物形成元素Al向氧化前沿的扩散,从而促进了保护性Al2O3的快速形成,使得溅射Ni16Co26Cr10Al纳米晶涂层表现出比M38合金更优异的抗热腐蚀性能.Magnetron-sputter deposition was used to produce an Ni-16Co-26Cr-10Al nanocrystalline coating on a casting alloy substrate of the same composition. It can be employed to study the effect of crystallization on hot corrosion resistance performance of high temperature alloys. Hot corrosion tests were carried out in molten 75%Na2SO4 ＋25%NaCl at 900 ℃. The result showed that, because of the small size of crystals, the sputtered Ni-16Co-26Cr-10Al nanocrystalline coating promotes the diffusion of Al element to the oxidation front and speeds up the formation of protective Al2O3. As a result, the sputtered Ni-16Co- 26Cr-10Al nanocrystalline coating displays better hot-corrosion resistance performance than M38 alloy does.

关 键 词：镍基高温合金 磁控溅射 M38高温合金 热腐蚀 腐蚀性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]