Preparation of Si3N4 Ceramics by Aligning α-Si3N4 Whiskers

摘要：

　　In this paper,silicon nitride (Si3N4) ceramics by aligning α-Si3N4 whiskers were prepared via tape casting,hot-press sintering technique using Y2O3 and MgO as sintering additives.Aligned α-Si3N4 whiskers were realized by modifying the tape casting technique.After tape casting,Si3N4 tape with good flexibility and uniform pores can be obtained.Microstructures of the tape,green body and sintered sample were observed by SEM images.The results show α-Si3N4 whiskers in Si3N4 tape and green body were aligned preferentially along the tape casting direction.Si3N4 ceramics with aligned elongated grains are developed by hot-press sintering technique based on the reaction between Si3N4 and the sintering additives which lead to the liquid phase.

关键词： Silicon nitride (Si3N4) Tape casting Hot-press sintering Alignment

作者: Yu-hui Bi Jun Li Fei Chen Dong-ming Zhang Qiang Shen Lian-meng Zhang

作者单位: State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,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: 881-884

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）