Effects of ZrC content on the microstructure and mechanical property of ZrC/ZTA composites consolidated by hot pressing

doi:10.1016/j.jallcom.2020.158402

	Effects of ZrC content on the microstructure and mechanical property of ZrC/ZTA composites consolidated by hot pressing
	Li, Shufen 1,2,3; Zhu, Yabin 2,3; Chai, Jianlong 2,3; Liu, Yiwen 3; Niu, Lijuan 1,2,3; Gao, Xing 3; Jin, Peng 2,3; Shen, Tielong 2,3; Cui, Minghuan 2,3; Wang, Zhiguang 2,3
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2021-04-15
卷号	860 页码:8
关键词	Zirconium carbide Zirconia toughened alumina Microstructure Mechanical properties Hot pressing
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2020.158402
通讯作者	Zhu, Yabin(zhuyabin@impcas.ac.cn) ; Wang, Zhiguang(zhgwang@impcas.ac.cn)
英文摘要	In the present work, effects of ZrC addition (10, 15, 20, 25 vol%) on microstructure and mechanical properties of ZTA 20 mol% (Zirconia-20 mol% Toughened Alumina) ceramic composites were investigated. Samples were prepared by Hot Pressing Sintering (HP) at 1600 degrees C and 30 MPa for a soaking time of 2 h. Microstructures were characterized by XRD, Raman, SEM and TEM. XRD and Raman spectra results revealed that only ZrC, alpha-Al2O3 and ZrO2 were detected for all composites, indicating that these ceramic composites had excellent chemical compatibilities. SEM images showed refined microstructure was obtained, and the fracture surfaces exhibited a mixed process of transgranular and intergranular fracture. According to the TEM observations, some nano-sized ZrC particles dispersed inside Al2O3 grains and formed an intra/inter-type nanostructure. The relative densities and Vickers hardness were inversely proportional to ZrC content, which gradually decreased from 98.24% to 94.89%, from 1 847-1691 HV1, respectively. Flexural strength and fracture toughness were tested by three-point bending method and single-edge notched beam method, respectively. The fracture toughness increased at first and then decreased with ZrC content increased from 0 to 25 vol%. The maximum value was 11.23 MPa m(1/2) with 20 vol% ZrC addition, with an enhancement of 51% compared to the undoped ZTA mixture. The flexural strength, with a maximum of 1121 MPa without ZrC addition and decreased to 645 MPa with ZrC-10(vol%) addition, then increased monotonously to 1084 MPa as the ZrC content increased from 10 to 25 vol%. (C) 2020 The Author(s). Published by Elsevier B.V. CC_BY_NC_ND_4.
资助项目	National Natural Science Foundation of China[U1832149]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000614154600064
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/138020]
专题	中国科学院近代物理研究所
通讯作者	Zhu, Yabin; Wang, Zhiguang
作者单位	1.Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Li, Shufen,Zhu, Yabin,Chai, Jianlong,et al. Effects of ZrC content on the microstructure and mechanical property of ZrC/ZTA composites consolidated by hot pressing[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,860:8.
APA	Li, Shufen.,Zhu, Yabin.,Chai, Jianlong.,Liu, Yiwen.,Niu, Lijuan.,...&Xie, Erqing.(2021).Effects of ZrC content on the microstructure and mechanical property of ZrC/ZTA composites consolidated by hot pressing.JOURNAL OF ALLOYS AND COMPOUNDS,860,8.
MLA	Li, Shufen,et al."Effects of ZrC content on the microstructure and mechanical property of ZrC/ZTA composites consolidated by hot pressing".JOURNAL OF ALLOYS AND COMPOUNDS 860(2021):8.