Microstructure evolution of nanostructured Ni3Al during annealing

摘要：

A nanocrystalline layer was produced on the surface of Ni3Al intermetallic by means of surface mechanical attrition treatment.The surface nanocrystallites were annealed at 250750 ℃ for 30 min.Microstructure evolution of nanocrystallites during annealing was studied by X-ray diffraction (XRD) and transmission electronic microscope (TEM).The experimental results show that long-rang order recovers rapidly when annealing temperature is below 250 ℃ and changes slowly at 350550 ℃,and then it increases rapidly at 750 ℃.The grain size of nanocrystallites of Ni3Al keeps stable and crystal defects recover when they are annealed below 550 ℃.The grains grow normally in low temperature annealing and abnormal growth occurs at 750℃.

关键词： Ni3Al intermetallic compound nanocrystallite

作者: REN Jiang-wei SHAN Ai-dang LIU Jun-liang ZHANG Jun-bao SONG Hong-wei

作者单位: Key Laboratory of Ministry of Education for High Temperature Materials and Tests,School of Materials Baosteel Technology Centre,Baoshan Iron & Steel Co. Ltd,Shanghai 201900,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）