Effects of CNTs content on microstructure and mechanical properties of Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites

doi:10.1016/j.ceramint.2019.06.253

	Effects of CNTs content on microstructure and mechanical properties of Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites
	Jia, Jiangang 1; Liu, Diqiang 1,2; Zhang, Sheng 1; Zhang, Bo 1; Liu, Shunwei 1; Ji, Genshun 1
刊名	Ceramics International
	2019-11-01
卷号	45 期号:16 页码:19956-19961
关键词	Alumina Aluminum oxide Bending strength Hot pressing Sol-gel process Sol-gels Textures Alpha-Al2O3 CNTs Hot-pressing process Matrix composite Microstructure and mechanical properties Relative density Short carbon fibers Transgranular fracture
ISSN号	02728842
DOI	10.1016/j.ceramint.2019.06.253
英文摘要	In this work, CNTs and short carbon fiber reinforced α-Al2O3 matrix composites (i.e., Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3) were prepared by sol-gel dispersing method followed by hot pressing process. Effects of CNTs content on the mechanical properties of Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites were investigated and the inter- and transgranular fracture mechanisms in Cnt-Csf/α-Al2O3 composites were analyzed. The hardness and relative density of Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites slightly decrease as CNTs content increases. The flexural strength and fracture toughness monotonically increase with the increase in Cnt content for both Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites. Addition of Csf and CNTs into α-Al2O3 matrix results in a bimodal grain size microstructure of Cnt-Csf/α-Al2O3 composites, which accounts for the unique fractograph and the enhanced toughness of Cnt-Cf/α-Al2O3 composites. The flexural strength and fracture toughness of Csf5-nt06 composite are 465 MPa and 7.08 MPa/m2, 37% and 13% higher than that of Cnt06, and 42% and 34% higher than that of Csf5, respectively. © 2019 Elsevier Ltd and Techna Group S.r.l.
WOS研究方向	Materials Science
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000488148100043
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114362]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Materials Science and Engineering, North University of China, Taiyuan; 030051, China
推荐引用方式 GB/T 7714	Jia, Jiangang,Liu, Diqiang,Zhang, Sheng,et al. Effects of CNTs content on microstructure and mechanical properties of Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites[J]. Ceramics International,2019,45(16):19956-19961.
APA	Jia, Jiangang,Liu, Diqiang,Zhang, Sheng,Zhang, Bo,Liu, Shunwei,&Ji, Genshun.(2019).Effects of CNTs content on microstructure and mechanical properties of Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites.Ceramics International,45(16),19956-19961.
MLA	Jia, Jiangang,et al."Effects of CNTs content on microstructure and mechanical properties of Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites".Ceramics International 45.16(2019):19956-19961.