Interface microstructure and diffusion of vacuum annealed ceramic coating on superalloy GH202

摘要：

In order to improve the wear resistance and hightemperature oxidation resistance of superalloy GH202, the ultrafine-grain ceramic coating containing nanosize nickel particles was obtained by flow coat method on the surface of GH202.The interface microstructure between ceramic coating and superalloy GH202 substrate during vacuum diffusion was studied. It is shown that Al2O3 oxide layer and (Ti, N)compound exist in the alloy substrate close to interface. During long time diffusion, nano-size nickel powders gradually congregate and grow up, and the confluent interface appears, which shows that the nano-size nickel powders have the effect of restraining the coating from failure.

关键词： GH202 superalloy nano-size nickel powder ceramic coating vacuum annealing microstructure

作者: GU Yi XIA Chang-qing QIU Guan-zhou WANG Zhi-fa

作者单位: School of Materials Science and Engineering, Central South University,Changsha 410083, China School of Materials Science and Engineering, Central South University, Changsha 410083, China

会议类型: 国际会议

会议名称: 2009 Frontier Symposium of China Postductors on Materrials Science(2009年中国博士后材料科学前言论坛)

会议地点: 长沙

会议语种:英文

页码: 701-705

在线出版日期: 2009-11-22（万方平台首次上网日期，不代表论文的发表时间）