Yield Strength of Transparent MgAl(2)O(4) Nano-Ceramic at High Pressure and Temperature

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	Yield Strength of Transparent MgAl(2)O(4) Nano-Ceramic at High Pressure and Temperature
	J. Zhang; T. C. Lu; X. H. Chang; S. L. Jiang; N. A. Wei; J. Q. Qi
	2010
发表期刊	Nanoscale Research Letters
ISSN	1931-7573
卷号	5 期号:8 页码:1329-1332
摘要	We report here experimental results of yield strength and stress relaxation measurements of transparent MgAl(2)O(4) nano-ceramics at high pressure and temperature. During compression at ambient temperature, the differential strain deduced from peak broadening increased significantly with pressure up to 2 GPa, with no clear indication of strain saturation. However, by then, warming the sample above 400A degrees C under 4 GPa, stress relaxation was obviously observed, and all subsequent plastic deformation cycles are characterized again by peak broadening. Our results reveal a remarkable reduction in yield strength as the sintering temperature increases from 400 to 900A degrees C. The low temperature for the onset of stress relaxation has attracted attention regarding the performance of transparent MgAl(2)O(4) nano-ceramics as an engineering material.
部门归属	[zhang, jie; lu, tiecheng; chang, xianghui; jiang, shengli; wei, nian; qi, jianqi] sichuan univ, dept phys, chengdu 610064, peoples r china. [zhang, jie; lu, tiecheng; chang, xianghui; jiang, shengli; wei, nian; qi, jianqi] sichuan univ, minist educ, key lab radiat phys & technol, chengdu 610064, peoples r china. [lu, tiecheng] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;lu, tc (reprint author), sichuan univ, dept phys, chengdu 610064, peoples r china;zhjie126@126.com lutiecheng@scu.edu.cn
关键词	Transparent Mgal(2)o(4) Nano-ceramics High Pressure/temperature Differential Strain Yield Strength Stress Relaxation Spinel Thermomechanics Powder Size
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31704
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Zhang,T. C. Lu,X. H. Chang,et al. Yield Strength of Transparent MgAl(2)O(4) Nano-Ceramic at High Pressure and Temperature[J]. Nanoscale Research Letters,2010,5(8):1329-1332.
APA	J. Zhang,T. C. Lu,X. H. Chang,S. L. Jiang,N. A. Wei,&J. Q. Qi.(2010).Yield Strength of Transparent MgAl(2)O(4) Nano-Ceramic at High Pressure and Temperature.Nanoscale Research Letters,5(8),1329-1332.
MLA	J. Zhang,et al."Yield Strength of Transparent MgAl(2)O(4) Nano-Ceramic at High Pressure and Temperature".Nanoscale Research Letters 5.8(2010):1329-1332.