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研究了IC - 6高温合金及其防护性涂层NiCrAlY和NiCoCrAlY涂层在 90 0～ 110 0℃时的氧化 .结果表明 :沉积NiCrAlY和NiCoCrAlY涂层后大大改善了IC - 6合金的抗氧化性 .在 10 0 0和 110 0℃时 ,NiCrAlY涂层的抗氧化性优于NiCoCrAlY涂层 .90 0℃时 ,NiCrAlY涂层氧化膜主要是α -Al2 O3 ,同时还含有少量的Cr2 O3 ;而NiCoCrAlY涂层氧化膜为单一的α-Al2 O3 ,但由于NiCoCrAlY涂层表面氧化膜不致密 ,降低了涂层的抗氧化性 .10 0 0℃氧化时 ,NiCrAlY涂层和NiCoCrAlY涂层的氧化膜主要由α -Al2 O3 和Cr2 O3 构成
The oxidation of NiCrAlY and NiCoCrAlY coatings was studied at 90 0 ~ 110 0 ℃ for the coatings of IC - 6 superalloy and their protective coatings.The results show that the oxidation resistance of the IC - 6 superalloy and NiCoCrAlY coating is greatly improved after NiCrAlY and NiCoCrAlY coatings were deposited The NiCrAlY coatings exhibited better oxidation resistance than NiCoCrAlY coatings at 100 and 110 ° C. The oxide films of NiCrAlY coatings were mainly α -Al 2 O 3 and a small amount of Cr 2 O 3 at 90 0 ℃ NiCoCrAlY coating oxide film is a single α-Al2 O3, but due to the NiCoCrAlY coating surface oxide film is not dense, reducing the oxidation resistance of the coating .100 ℃ oxidation, NiCrAlY coating and NiCoCrAlY coating oxide film Mainly by α -Al 2 O 3 and Cr 2 O 3 form