Sintering mechanism of the in situ synthesized TiB-TiB2 ceramic composites
- 作者：ZHANG ZhaohuiSHEN XiangboWANG FuchiLUO jieLI Shukui
- 会议时间：2012-08-01
- 关键词：ceramic composite ; spark plasma sintering ; microstrncture ; sintering mechanism
- 作者单位：ZHANG Zhaohui,WANG Fuchi,LI Shukui(School of.Material Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;National Key Laboratory of Science and Technology on Materials under Shock and Impact,Beijing 100081,China)SHEN Xiangbo,LUO jie(School of.Material Science and Engineering,Beijing Institute of Technology,Beijing 100081,China)
- 母体文献：2012全国金相与显微分析学术研讨会论文集
- 会议名称：2012全国金相与显微分析学术研讨会
- 会议地点：昆明
- 主办单位：中国体视学学会
- 语种：chi
摘要
TiB-TiB2 ceramic composites were synthesized in situ by spark plasma sintering method at dif ferent temperatures.The microstructure, the mechanical properties as well as the sintering mechanism of the TiB-TiB2 composites are investigated.According to the microstructure evolution of the in situ synthe sized TiB-TiB2composites, the description of the sintering process can be divided into 4 stages: activation and melt of the metal powders, reaction of Ti with TiB2, coarsening of TiB whiskers, and rapid densifica tion.Only if the above mentioned sintering stages proceed in turn and are all fully completed, the TiBTiB2 ceramic composite with dense microstructure and good mechanical properties can be obtained.