PCrNi3MoVA钢表面溅射NiCrAlY涂层的高温氧化行为  

High temperature oxidation behavior of magnetron sputtered NiCrAlY coatings on PCrNi3MoVA steel

作　　者：郭策安[1,2] 张健[1] 郭秋萍 张家东[4] 

机构地区：[1]沈阳理工大学装备工程学院,辽宁沈阳110159 [2]东北大学材料与冶金学院,辽宁沈阳110004 [3]驻齐齐哈尔和平机械厂军事代表室,黑龙江齐齐哈尔161000 [4]沈阳铸造研究所,辽宁沈阳110022

出　　处：《材料热处理学报》2013年第5期175-179,共5页Transactions of Materials and Heat Treatment

基　　金：辽宁省教育厅资助(L2012058)

摘　　要：用磁控溅射方法在PCrNi3MoVA钢表面制备NiCrAlY涂层,涂层在空气中850℃恒温氧化100 h,借助XRD、SEM和EDAX对涂层表面氧化膜进行分析,检测其恒温抗氧化能力。结果表明,涂层大大提高了基体的抗氧化性,涂层表面主要生成了与基体粘附性好的Al2O3氧化膜,在柱状晶间隙较大处生成了NiCr2O4氧化膜与Fe2O3氧化膜;同时涂层的Ni元素与基体的Fe元素发生了明显的互扩散,而Cr元素在界面富集,Al元素主要集中在表面和界面,与氧发生反应生成Al2O3。Specimens with NiCrAIY coatings, prepared by magnetron sputtering, were deposited on PCrNi3MoVA steel substrate. The specimens were isothermally oxidized at 850 ℃ for 100 h in air . Oxidation behavior of the coatings was analyzed by means of XRD, SEM and EDAX analysis. The results show that the NiCrAIY coatings substantially increase the high-temperature oxidation resistance of PCrNi3MoVA steel and the A1203oxide layer with good adhesion can form on the sputtered NiCrAIY coatings,and the NiCr204 and Fe20s oxide layers form at the bigger gaps between columnar grains. At the same time, the obvious interdiffusion occurs between element Fe in the substrate and element Ni in the sputtered NiCrAIY coatings, while element Cr mainly distributes at the interface and element AI mainly distributes on the surface and at the interface where A1 reacts with O to form AI203.

关 键 词：PCrNi3MoVA钢 磁控溅射 NICRALY 高温氧化 

分 类 号：TG174.44[金属学及工艺—金属表面处理]