Properties of Mechanical Activation Combustion Synthesied High α-Content Silicon Nitride Powders and Sintered Bulk Ceramics after Iteration Reactions

摘要：

　　Effect of iteration times on mechanically-activated combustion synthesis of high α-content Si3N4 powders was investigated.Properties of the as-synthesized powders such as α-content (Ca) as well as specific surface area (As) were examined.Results showed that both of Cα and As became higher after iteration reactions.The mechanical properties of the sintered bulk ceramics from as-synthesized powders were also tested to reveal the sinterability of the powders.Results showed that relative density of all the sintered bulk ceramics were higher than 97%.Furthermore,fracture toughness had a trend of becoming higher,which reached a value of 10.2 MPam 0.5.Correspondingly,bending strenth became a bit lower.

关键词： Silicon nitride Mechanically-activated combustion synthesis Mechanical properties

作者: Ren Kegang Chen Kexin Zhou Heping Jin Haibo Zhong Jidong Ning Xiaoshan

作者单位: Department of Materials Science & Engineering,The State Key Lab.of New Ceramics & Fine Processing,Ts School of Materials Science & Engineering,Beijing Institute of Technology,Beijing 100081,China

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: 862-864

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）