摘要
采用磁控溅射方法在镍基单晶高温合金基体上制备了晶粒平均尺寸小于 10 0nm的Ni 30Cr 12Al 0 3Y微晶涂层 ,并对基体和涂层在 10 5 0℃下的抗循环氧化行为进行了研究。结果表明 :基体经过 2次循环后 ,氧化膜即出现剥落 ,基体表面形成的氧化物主要是NiO和Cr2 O3,保护性能不及Al2 O3;而微晶涂层在循环氧化过程中形成Al2 O3保护膜 ,经过 10 0次循环后Al2 O3氧化膜仍完好无损。真空热处理提高了涂层氧化膜形成的均匀性。
Ni 30Cr 12Al 0 3Y micro grain coatings whose mean grain size was less than 100nm, were produced on Ni base superalloy substrate by magnetron sputtering The cyclic oxidation behavior of the cast alloy and the sputtered coating was studied at 1050℃ It was shown that the scale of the cast alloy had spalled after two cycles, and the oxide was mainly composed of NiO and Cr 2O 3, whose protection for the substrate was inferior to that of the Al 2O 3 scale However, the sputtered coating surface formed Al 2O 3 scale during the cycles, and the Al 2O 3 scale was still perfective after 100 cycls The uniformity of oxide formed on the sputtered coating was raised by vacuum heat treatment
出处
《机械工程材料》
CAS
CSCD
北大核心
2001年第9期7-9,27,共4页
Materials For Mechanical Engineering
