两种IC-6高温合金防护涂层的氧化行为  

OXIDATION BEHAVIOR OF TWO PROTECTIVE COATINGS ON ALLOY IC-6

作　　者：王冰[1] 孙超[1] 黄荣芳[1] 闻立时[1] 

机构地区：[1]中国科学院金属研究所,沈阳110016

出　　处：《腐蚀科学与防护技术》2001年第z1期476-480,共2页Corrosion Science and Protection Technology

摘　　要：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 O3The oxidation kinetic curves of the alloy IC-6 and its protective coatings at 900～1100℃ were measured.The results indicate that the oxidation resistance of intermetallic compound alloy IC-6 is remarkable improved by NiCrAlY and NiCoCrAlY coatings respectively.However,NiCrAlY coating has better oxidation resistance than NiCoCrAlY coating exposed at 1000 and 1100℃.For NiCrAlY coating,the oxide scales formed at 900℃ and 1000℃ mainly consist of α-Al 2O 3 and a small amount of Cr 2O 3.For NiCoCrAlY coating,though the oxide scales consist only of α-Al 2O 3 at 900℃,the oxidation resistance was inferior due to the incomplete scales.The scales formed on the NiCoCrAlY coating at 1000℃ consist of α-Al 2O 3 and Cr 2O 3.

关 键 词：电弧离子镀 IC-6高温合金 等温氧化 MCRALY涂层 

分 类 号：TG172.82[金属学及工艺—金属表面处理]