Improvement in Oxidation Resistance of Ni3Al Based Single Crystal Superalloy IC32 by NiAlHfSi Coating

摘要：

　　In order to improve the oxidation performance of IC32,the NiAlHfSi coating was deposited on the alloy by electron beam physical vapor deposition (EB-PVD) method.The oxidation resistance of the coated alloy at 1423 K was investigated.The microstructures of the samples before and after oxidation were examined by SEM,XRD and EPMA.It was found that the oxide scales compactly formed on the surface of the coating,and the oxidation mainly consisted of Al2O3 and NiAl2O4.Phase transformation occurred from β-NiAl to γ′-Ni3Al in the coating after oxidation for extend periods.The diffusion and oxidation of Mo were prevented effectively by the coating,which improved the oxidation performance of IC32 significantly.

关键词： IC32:NiAlHfSi coating:Oxidation resistance:Molybdenum

作者: Pengchao Dai Hui Peng Yanling Pei Yue Ma Shusuo Li Shengkai Gong

作者单位: School of Material Science and Engineering, Beihang University, Beijing 100191, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 604-612

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）