摘要
分别用亚音速和超音速等离子喷涂方法在CuCrZr合金表面制备了NiAI涂层，通过正交试验对工艺参数进行优化，测定了涂层与基体的结合强度。利用SEM、EDS、XRD等设备研究了涂层的组织结构、物相变化及涂层与基体间的结合方式。结果表明，超音速等离子喷涂制备的NiAl涂层粒子变形充分、组织致密，涂层与基体间的结合强度明显高于亚音速喷涂层；两种方法制备的涂层与基体的界面处主要均为A1，界面的局部区域Cu-Al发生反应生成了Cu，Al2、CuAl2、CuAl等新相，形成了1～3μm宽的“微合金化”层。
NiAl coatings were prepared by subsonic and supersonic plasma spraying on CuCrZr alloy, and the process parameters were optimized by orthogonal test. The bonding strength between coating and substrate was measured. The coating structure, physical phase change and bonding mode were analyzed by means of SEM, EDS and XRD. The results show that the NiAl coating prepared by supersonic plasma spraying has sufficient deformation and its structure is compact, and the bonding strength is obviously higher than that by subsonic plasma spraying. All the interface of NiAl coating and substrate prepared by the two methods is mainly Al, reaction of Cu-Al in partial area of the interface occurs and formed new phases like Cu2Al2, CuAl2 and CuAl, and a width of 1-3 μm microalloyed layer is formed.
出处
《金属热处理》
CAS
CSCD
北大核心
2014年第2期68-71,共4页
Heat Treatment of Metals
基金
江苏高校优势学科建设工程项目
