Cr-O-N扩散阻挡层对NiCrAlY涂层结合性能的影响  

EFFECTS OF Cr-O-N DIFFUSION BARRIERS ON THE ADHESION OF NiCrAlY COATINGS

作　　者：姚勇[1] 李伟洲[1,2] 王启民[1] 宫骏[1] 孙超[1] 李家宝[1] 

机构地区：[1]中国科学院金属研究所材料表面工程研究部,沈阳110016 [2]广西大学资源与环境学院,南宁530004

出　　处：《金属学报》2008年第7期876-882,共7页Acta Metallurgica Sinica

基　　金：国家自然科学基金项目50571101资助~~

摘　　要：采用电弧离子镀技术制备了不同成分的Cr-O-N薄膜作为NiCrAlY涂层与高温合金基材DSM11之间的扩散阻挡层.研究了不同O_2和N_2流量对Cr-O-N薄膜的相含量的影响及对NiCrAlY/Cr-O-N/DSM11体系薄膜结合强度的影响.实验结果表明,Cr-O-N是由Cr_2O_3和CrN组成的多晶膜,两相的相对含量随O_2和N_2流量改变而发生变化.扩散阻挡层抑制元素扩散的同时降低了NiCrAlY涂层与基体间的结合强度,且随着阻挡层中氧含量的增加结合强度逐渐下降.适当的氧含量可以使NiCrAlY/Cr-O-N/DSM11涂层体系具有良好的结合强度和抗元素扩散能力.Cr-O-N films as diffusion barriers were deposited between NiCrAlY coating and DSMll substrate by arc ion plating （AIP）. The effects of flow rates of oxygen and nitrogen on phase content in diffusion barriers and on the adhesion between coatings and substrates were investigated. The results indicate that the Cr-O-N film is polycrystalline film and consistes of Cr2O3 and CrN, and their relative contents change with flow rates of oxygen and nitrogen. The adhesion of Cr-O-N films decreased with increasing oxygen content, but proper oxygen content can keep good adhesion and also restrain the interdiffusion of elements.

关 键 词：Cr-O-N 扩散阻挡层 结合强度 电弧离子镀 DSM11合金 

分 类 号：TG111.5[金属学及工艺—物理冶金] TG174.44[金属学及工艺—金属学]