论文部分内容阅读
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。
The Ni 30Cr 12Al 0 3Y microcrystalline coating with the average grain size of less than 100 nm was prepared by magnetron sputtering on a nickel-based single crystal superalloy substrate. The matrix and coating were anti-cyclic at 105 ℃ Oxidation behavior was studied. The results show that the oxide film is peeled off after two cycles of the substrate. The oxide formed on the surface of the substrate is mainly NiO and Cr2O3, which is less protective than Al2 O3. The microcrystalline coating forms the protective film of Al2 O3 during the cyclic oxidation , After 10 0 cycles Al 2 O 3 oxide film is still intact. Vacuum heat treatment increases the uniformity of the coating oxide film formation.