Two-step hot pressing of bimodal micron/nano-ZrB2 ceramic with improved   mechanical properties and thermal shock resistance

doi:10.1016/j.ijrmhm.2014.05.016

CORC > 北京大学 > 工学院

	Two-step hot pressing of bimodal micron/nano-ZrB2 ceramic with improved mechanical properties and thermal shock resistance
	He, Rujie ; Zhang, Rubing ; Pei, Yongmao ; Fang, Daining
刊名	international journal of refractory metals hard materials
	2014
关键词	ZrB2 Hot pressing Mechanical properties Microstructure Thermal shock resistance GRAIN-GROWTH TEMPERATURE COMPOSITES ZRB2 DENSIFICATION BEHAVIOR
DOI	10.1016/j.ijrmhm.2014.05.016
英文摘要	The densification and grain growth behaviors for micron- and nano-sized ZrB2 particles were investigated. The densification on-set temperature (Td-micron) and grain growth on-set temperature (Tg-micron) for micron-sized ZrB2 particles were about 1500 degrees C and 1800 degrees C, respectively. And the densification on-set temperature (Td-nano) and grain growth on-set temperature (Tg-nano) for nano-sized ZrB2 particles were about 1300 degrees C and 1500 degrees C, respectively. A bimodal micron/nano-ZrB2 ceramic was therefore prepared using a novel two-step hot pressing. A high relative density of 99.2%, an improved flexural strength of 580.2 +/- 35.8 MPa and an improved fracture toughness of 7.2 +/- 0.4 MPa.m(1/2) were obtained. The measured critical thermal shock temperature difference (Delta T-c) for this bimodal micron/nano-ZrB2 ceramic was as high as 433 degrees C. (C) 2014 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000340863600011&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; SCI(E); EI; 13; ARTICLE; herujie@pku.edu.cn; 65-70; 46
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154201]
专题	工学院
推荐引用方式 GB/T 7714	He, Rujie,Zhang, Rubing,Pei, Yongmao,et al. Two-step hot pressing of bimodal micron/nano-ZrB2 ceramic with improved mechanical properties and thermal shock resistance[J]. international journal of refractory metals hard materials,2014.
APA	He, Rujie,Zhang, Rubing,Pei, Yongmao,&Fang, Daining.(2014).Two-step hot pressing of bimodal micron/nano-ZrB2 ceramic with improved mechanical properties and thermal shock resistance.international journal of refractory metals hard materials.
MLA	He, Rujie,et al."Two-step hot pressing of bimodal micron/nano-ZrB2 ceramic with improved mechanical properties and thermal shock resistance".international journal of refractory metals hard materials (2014).