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	Hot pressed hfb2 and hfb2-20 vol%sic ceramics based on hfb2 powder synthesized by borothermal reduction of hfo2
	Ni, De-Wei1,2; Zhang, Guo-Jun1; Kan, Yan-Mei1; Wang, Pei-Ling1
刊名	International journal of applied ceramic technology
	2010
卷号	7期号:6页码:830-836
ISSN号	1546-542X
DOI	10.1111/j.1744-7402.2009.02404.x
通讯作者	Ni, de-wei()
英文摘要	Phase pure hafnium diboride (hfb2) powder was synthesized by borothermal reduction of hafnium dioxide using amorphous boron at relatively low temperature (1600 degrees c) in vacuum. the synthesized hfb2 powder had an average particle size of 1.37 mu m with an equiaxed shape, and a low oxygen content of 0.79wt%. using the as-synthesized hfb2 powder and a commercial sic, hfb2 monolithic, and hfb2-20 vol%sic composite were hot pressed at 2000 degrees c to relative densities of 95.7% and 99.2%, respectively. with the addition of sic, the grain size decreased and the fracture behavior changed from intergranular to a mixed mode, which resulted in a high flexural strength of 993 +/- 90 mpa for the composite. fracture toughness of the composite was 6.29 +/- 0.65mpam(1/2), which was significantly higher than that of the hfb2 monolithic and the reported values in literature.
WOS关键词	HIGH-TEMPERATURE CERAMICS ; DIBORIDE-BASED CERAMICS ; ZIRCONIUM DIBORIDE ; HAFNIUM ; COMPOSITES ; MICROSTRUCTURE ; OXIDATION ; RESISTANCE ; STRESSES ; CARBIDE
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000283728600015
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2407177
专题	中国科学院大学
通讯作者	Ni, De-Wei
作者单位	1.Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 200049, Peoples R China
推荐引用方式 GB/T 7714	Ni, De-Wei,Zhang, Guo-Jun,Kan, Yan-Mei,et al. Hot pressed hfb2 and hfb2-20 vol%sic ceramics based on hfb2 powder synthesized by borothermal reduction of hfo2[J]. International journal of applied ceramic technology,2010,7(6):830-836.
APA	Ni, De-Wei,Zhang, Guo-Jun,Kan, Yan-Mei,&Wang, Pei-Ling.(2010).Hot pressed hfb2 and hfb2-20 vol%sic ceramics based on hfb2 powder synthesized by borothermal reduction of hfo2.International journal of applied ceramic technology,7(6),830-836.
MLA	Ni, De-Wei,et al."Hot pressed hfb2 and hfb2-20 vol%sic ceramics based on hfb2 powder synthesized by borothermal reduction of hfo2".International journal of applied ceramic technology 7.6(2010):830-836.

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