Zirconium Aluminum Carbides: New Precursors for Synthesizing ZrO(2)-Al(2)O(3) Composites

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	Zirconium Aluminum Carbides: New Precursors for Synthesizing ZrO(2)-Al(2)O(3) Composites
	L. F. He; Y. W. Bao; Y. C. Zhou
	2009
发表期刊	Journal of the American Ceramic Society
ISSN	0002-7820
卷号	92 期号:11 页码:2751-2758
摘要	ZrO(2)-Al(2)O(3) nanocrystalline powders have been synthesized by oxidizing ternary Zr(2)Al(3)C(4) powders. The simultaneous oxidation of Al and Zr in Zr(2)Al(3)C(4) results in homogeneous mixture of ZrO(2) and Al(2)O(3) at nanoscale. Bulk nano- and submicro-composites were prepared by hot-pressing as-oxidized powders at 1100 degrees-1500 degrees C. The composition and microstructure evolution during sintering was investigated by XRD, Raman spectroscopy, SEM, and TEM. The crystallite size of ZrO(2) in the composites increased from 7.5 nm for as-oxidized powders to about 0.5 mu m at 1500 degrees C, while the tetragonal polymorph gradually converted to monolithic one with increasing crystallite size. The Al(2)O(3) in the composites transformed from an amorphous phase in as oxidized powders to theta phase at 1100 degrees C and alpha phase at higher temperatures. The hardness of the composite increased from 2.0 GPa at 1100 degrees C to 13.5 GPa at 1400 degrees C due to the increase of density.
部门归属	[he, ling-feng; bao, yi-wang; zhou, yan-chun] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [he, ling-feng] chinese acad sci, grad sch, beijing 100039, peoples r china.;zhou, yc (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china,peoples r china;yczhou@imr.ac.cn
关键词	X-ray-diffraction Si-c Ceramics Crystal-structure Mechanical-properties Layered Carbide Thermoelectric Properties Fracture-toughness Martensitic Nucleation Al2o3-zro2 Composites Phase-transformation
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31961
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. F. He,Y. W. Bao,Y. C. Zhou. Zirconium Aluminum Carbides: New Precursors for Synthesizing ZrO(2)-Al(2)O(3) Composites[J]. Journal of the American Ceramic Society,2009,92(11):2751-2758.
APA	L. F. He,Y. W. Bao,&Y. C. Zhou.(2009).Zirconium Aluminum Carbides: New Precursors for Synthesizing ZrO(2)-Al(2)O(3) Composites.Journal of the American Ceramic Society,92(11),2751-2758.
MLA	L. F. He,et al."Zirconium Aluminum Carbides: New Precursors for Synthesizing ZrO(2)-Al(2)O(3) Composites".Journal of the American Ceramic Society 92.11(2009):2751-2758.