New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2

doi:10.1016/j.scriptamat.2016.08.012

	New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2
	Wang, Lujie 1,2; Qi, Qian 1; Cai, Ping 1; Zhang, Hui 1; Yang, Xiao 1; Liu, Xuejian 1; Jiao, Zheng 2; Huang, Zhengren 1
刊名	Scripta Materialia
	2017
卷号	126 页码:11-14
ISSN号	13596462
DOI	10.1016/j.scriptamat.2016.08.012
英文摘要	Silicon nitride (Si3N4) ceramics were pressureless sintered with 0.2 wt% FeSi2at 1780 °C for 2 h in nitrogen with Al2O3and Y2O3as sintering aids and found to have high toughness and strength. During the sintering process, β-Si3N4crystal seeds and Fe5Si3reinforcing particles were in situ generated by FeSi2. Abnormal growth of Si3N4grains was promoted by β-Si3N4crystal seeds. High thermal expansion coefficient of Fe5Si3particles induced residual stresses in the ceramics matrix, which deflected the crack. Ultimately, the fracture toughness and flexural strength of Si3N4ceramics reached 9.8 ± 0.5 MPa·m1/2and 1086 ± 48 MPa respectively. © 2016 Acta Materialia Inc.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25927]
专题	中国科学院上海硅酸盐研究所
作者单位	1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai; 200050, China; 2.College of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China
推荐引用方式 GB/T 7714	Wang, Lujie,Qi, Qian,Cai, Ping,et al. New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2[J]. Scripta Materialia,2017,126:11-14.
APA	Wang, Lujie.,Qi, Qian.,Cai, Ping.,Zhang, Hui.,Yang, Xiao.,...&Huang, Zhengren.(2017).New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2.Scripta Materialia,126,11-14.
MLA	Wang, Lujie,et al."New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2".Scripta Materialia 126(2017):11-14.