Effects of CNTs content on microstructure and mechanical properties of C-nt/alpha-Al2O3 and C-nt-C-sf/alpha-Al2O3 composites

doi:10.1016/j.ceramint.2019.06.253

	Effects of CNTs content on microstructure and mechanical properties of C-nt/alpha-Al2O3 and C-nt-C-sf/alpha-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
卷号	45 期号:16 页码:19956-19961
关键词	Alpha-Al2O3 Fracture toughness Flexural strength CNTs Short carbon fiber
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2019.06.253
英文摘要	In this work, CNTs and short carbon fiber reinforced alpha-Al2O3 matrix composites (i.e., C-nt/alpha-Al2O3 and C-nt-C-sf/alpha-Al2O3) were prepared by sol-gel dispersing method followed by hot pressing process. Effects of CNTs content on the mechanical properties of C-nt/alpha-Al2O3 and C-nt-C-sf/alpha-Al2O3 composites were investigated and the inter- and transgranular fracture mechanisms in C-nt-C-sf/alpha-Al2O3 composites were analyzed. The hardness and relative density of C-nt/alpha-Al2O3 and C-nt-C-sf/alpha-Al2O3 composites slightly decrease as CNTs content increases. The flexural strength and fracture toughness monotonically increase with the increase in C-nt content for both C-nt/alpha-Al2O3 and C-nt-C-sf/alpha-Al2O3 composites. Addition of C-sf and CNTs into alpha-Al2O3 matrix results in a bimodal grain size microstructure of C-nt-C-sf/alpha-Al2O3 composites, which accounts for the unique fractograph and the enhanced toughness of C-nt-C-sf/alpha-Al2O3 composites. The flexural strength and fracture toughness of C(sf)5-nt06 composite are 465 MPa and 7.08 MPa/m(2), 37% and 13% higher than that of C(nt)06, and 42% and 34% higher than that of C(sf)5, respectively.
资助项目	Gansu Province science and technology major projects[1602GKDD012]
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000488148100043
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31489]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Jia, Jiangang
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.North Univ China, Sch Mat Sci & Engn, Taiyuan 030051, Shanxi, Peoples R 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 C-nt/alpha-Al2O3 and C-nt-C-sf/alpha-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 C-nt/alpha-Al2O3 and C-nt-C-sf/alpha-Al2O3 composites.CERAMICS INTERNATIONAL,45(16),19956-19961.
MLA	Jia, Jiangang,et al."Effects of CNTs content on microstructure and mechanical properties of C-nt/alpha-Al2O3 and C-nt-C-sf/alpha-Al2O3 composites".CERAMICS INTERNATIONAL 45.16(2019):19956-19961.