Toughening Effect of ZrB2 in Al2O3-ZrB2 Nanocomposite Ceramics

	Toughening Effect of ZrB2 in Al2O3-ZrB2 Nanocomposite Ceramics
	Wang Xiaomin 1,2; La Peiqing1 ; Wang Bingjun 2; Yang Guolai1
	2016-07
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	45 期号:7 页码:1714-1718
摘要	The Al2O3-ZrB2 nanocomposite ceramics were prepared and the mechanical properties of the process parameters' effect were studied. The results show that for various applied sintering temperatures of Al2O3 ceramics, a maximum Vickers hardness of 18 970 MPa and high reliability are attained at 1500 degrees C and at atmosphere sintering. The fracture toughness is (5.2 +/- 0.3) MPa.m(1/2). In addition, the sample is not well densified at the sintering temperature. Scanning electron microscopy (SEM) shows that fine ZrB2 particles disperse and are pinned at grain boundaries to inhibit grain boundary movement effectively. While larger ZrB2 particles distribute between Al2O3 particles uniformly and occupy Al2O3 particles growing space to hinder the matrix grains, which greatly promote the densification of the ceramic and improve the microstructure. 20% ZrB2/Al2O3 composite ceramics exhibit a relative density above 98% at (450 degrees C, Vickers hardness of 18 070 MPa, and fracture toughness of (6.7 +/-.2) MPa.m(1/2) Fracture morphology indicates that trans-granular fracture occurs in the nanocomposite ceramic with high toughness.
关键词	atmospheric sintering nano alumina ceramic nanocomposite ceramics toughening
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Qinghai Province Science and Technology Department[2012-Z-924Q]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000381066800015
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/33657
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院兰石研究院（新区研究院）
通讯作者	Wang Xiaomin
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 2.Qinghai Univ, Xining 810016, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Wang Xiaomin,La Peiqing,Wang Bingjun,et al. Toughening Effect of ZrB2 in Al2O3-ZrB2 Nanocomposite Ceramics[J]. RARE METAL MATERIALS AND ENGINEERING,2016,45(7):1714-1718.
APA	Wang Xiaomin,La Peiqing,Wang Bingjun,&Yang Guolai.(2016).Toughening Effect of ZrB2 in Al2O3-ZrB2 Nanocomposite Ceramics.RARE METAL MATERIALS AND ENGINEERING,45(7),1714-1718.
MLA	Wang Xiaomin,et al."Toughening Effect of ZrB2 in Al2O3-ZrB2 Nanocomposite Ceramics".RARE METAL MATERIALS AND ENGINEERING 45.7(2016):1714-1718.