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.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
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)
关键词
热腐蚀
镍基高温合金
磁控溅射
hot corrosion
Ni-based superalloy
magnetron sputter
