摘要
在ＤＤ２镍基单晶材料上采用阴极电弧镀（ＡＰＤ）制备ＮｉＣｒＡｌＹ防护涂层，对扩散处理涂层、塑变处理涂层以及塑变与时效处理涂层的相组成与组织结构以及密度的变化进行了系统的试验研究。结果指出，塑变不仅能使扩散处理中析出的ＮｉＡｌ回溶到基体中去，同时还能明显改变涂层的致密度，使密度提高约３０％。塑变Ｎｉ３Ａｌ基体在随后的高温（１１００℃）时效处理中，又发生ＮｉＡｌ相的重新析出。
NiCrAlY deposition achieved by means of arc plasma deposition was used to protect DD2,a kind of nickel base single crystal materials,from high temperature oxidation.Phase analysis,microstructure and density of the deposition in different states including diffused,plastic deformed and aged after plastic deformation have been investigated.It has been showed that the process of plastic deformation can not only dissolve NiAl phase precipitated during diffusion treatment but also increase the density by 30%.It has also been pointed out that NiAl phase can be precipitated again from Ni\-3Al plastic deformed matrix at 1100℃.The deposition can be strengthened by the NiAl phase precipitation during ageing treatment.Investigation on the Microstructure Changes of Ni Cr Al Y Deposition due to Plastic Defor
关键词
抗氧化涂层
物相分析
相变
喷丸形变处理
时效
oxidation resistant deposition, phase analysis, phase transformation, shot peening, density
