Effect of Cr and Re on the Oxidation Resistance of Ni3Al-base Single Crystal Alloy IC21 at 1100℃

摘要：

　　The oxidation kinetic curves of three Ni3Al-based single crystal alloys (IC21,IC21C and IC21CR) with different Cr and Re content were examined at 1100℃.The microstructures and element distributions of the oxide scales on these alloys were investigated by scanning electron microscopy (SEM),X-ray diffraction (XRD) and energy dispersive X-ray spectrometry (EDS).Results revealed that the oxidation resistance of these alloys was improved in the order of IC21 < IC21C < IC21CR.The oxide products of IC21 mainly consisted of NiO,α-Al2O3,NiAl2O4 and a small amount of NiMoO4 and MoO2.The volatilization of Mo oxides led to the oxide scale spallation from IC21C,thus deteriorated the oxidation properties.While for IC21C and IC21CR,the oxidation resistance was significantly improved.The Mo oxides in the oxide layer were greatly reduced and a continuous α-Al2O3 layer was formed.

关键词： Ni3Al-based single crystal alloy:Chormium:Rrhenium:Oxidation resistance

作者: Xiaojing Xu Qiong Wu Shengkai Gong Shusuo Li

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: 582-587

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）