Microstructure Change of Molybdenum Disilicide Heating Unit in Nitrogen Atmosphere at 1700℃

摘要：

　　Transformation of the microstructure of molybdenum disilicide heating unit in nitrogen atmosphere at 1700℃ was investigated by XRD,SEM and EDS.The results showed that MoSi2 was transformed to polyhedral Si3N4 crystals groups distributed across in the matrix with irregular geometry Mo5Si3 and Mo3Si crystals,and the Si3N4 crystal groups were dense areas,while the Mo5Si3 and Mo3Si groups were loose areas after being heated in nitrogen atmosphere at 1700℃ for 3h.The thickness of conversion zone of MoSi2 matrix was about 30μm and the loose Mo5Si3 and Mo3Si areas can damage the dense structure of MoSi2 matrix.

关键词： MoSi2 Heating unit

作者: Baolin Liu Jingzhou Yang Huang Zhaohui Yangai Liu Minghao Fang

作者单位: School of Petroleum and Natural Gas Engineering,China University of Petroleum Beijing,Beijing 102249 National Laboratory of Mineral Materials,China University of Geosciences Beijing,Beijing 100083,Chin

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 955-957

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）