溅射Ni-16Co-26Cr-10Al纳米晶涂层的熔盐热腐蚀性能  

Hot corrosion resistance of a sputtered Ni-16Co-26Cr-10Al nanocrystalline coating in molten salts

作　　者：孙俭锋[1] 刘修超[1] 周月波[1] 王永东[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：《材料热处理学报》2009年第1期149-152,共4页Transactions of Materials and Heat Treatment

基　　金：黑龙江省教育厅科技项目(No.11531319);黑龙江科技学院引进人才项目(06-13)

摘　　要：利用磁控溅射技术在铸造Ni-16Co-26Cr-10Al合金上溅射了相同成分的纳米晶涂层,并进行900℃热腐蚀实验,结果表明:溅射Ni-16Co-26Cr-10Al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沿原"短路扩散通道-晶界"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Ni-16Co-26Cr-10Al纳米晶涂层表现出比M38合金更优异的抗热腐蚀性能。A sputtered nanocrystalline coating of Ni-16Co-26Cr-10Al alloy was obtained by means of magnetron sputtering technique on the same alloy substrate. The hot-corrosion behavior of the sputtered Ni-16Co-26Cr-10Al nanocrystalline coating and cast M38 in molten 75wt% Na2 S04 ＋ 25wt% NaCl at 900℃ was studied. The results show that the sputtered Ni-16Co-26Cr-10Al nanocrystalline coating exhibits much better hotcorrosion resistance compared to cast M38 superalloy as a result of the formation of a continuous and compact Al2O3 scale due to the enhanced diffusion of Al to the oxidation front along the increased＂short-circuit＂grain boundaries.

关 键 词：热腐蚀 镍基高温合金 磁控溅射 

分 类 号：TG132.32[一般工业技术—材料科学与工程] TG174.44[金属学及工艺—合金]