Creep behaviour of aluminium strengthened by fine aluminium carbide particles and reinforced by silicon carbide particulates - DS Al-SiC/Al4C3 composites

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	Creep behaviour of aluminium strengthened by fine aluminium carbide particles and reinforced by silicon carbide particulates - DS Al-SiC/Al4C3 composites
	S. J. Zhu; L. M. Peng; Q. Zhou; Z. Y. Ma; K. Kucharova; J. Cadek
	1999
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	268 期号:1-2 页码:236-245
摘要	Creep behaviour of aluminium strengthened by fine aluminium carbide particles and reinforced by silicon carbide particulates is investigated. For comparison, the results for two dispersion strengthened (DS) AlC alloys denoted DS AlCl and DS AlC2 are presented. (C1 and C2 mean the contents of carbon in wt% which define the volume fractions of Al4C3 particles in DS AIC alloys as well as in SiC/AlC composite matrices). The volume fraction of SiC particulates in composites, denoted SiC/AlCl, SiC/AlC2 and SiC/AlC3, was used to 10 vol.%. The creep in both DS AIC alloys as well as in SiC/AlC composites is associated with relatively high true threshold stress sigma(TH). The linear regression analysis showed that the true stress exponent of minimum creep strain rate of 8 should be preferred to that of 5. The creep strain rate was found to be controlled by lattice diffusion in the matrix metal-aluminium. The creep strength of the SiC/AlC composites increasing with the volume fraction of Al4C3 particles is entirely due to the effect of this fraction on the threshold stress. This is not the case of DS AlC alloys. The difference of the creep strength in SiC/AlC composites and the respective DS AlC alloys could be accounted for by the load transfer effect. The athermal detachment of dislocations from fine Al4C3 (and Al2O3) particles dispersed in the composite matrix is considered as the creep strain rate controlling process. (C) 1999 Published by Elsevier Science S.A. All rights reserved.
部门归属	acad sci czech republ, inst phys mat, brno 61662, czech republic. dalian univ technol, dept mat engn, dalian 116023, peoples r china. chinese acad sci, inst met res, shenyang 110015, peoples r china.;cadek, j (reprint author), acad sci czech republ, inst phys mat, brno 61662, czech republic
关键词	Ds Sic Alc Composites Creep Threshold Stress Stress Exponent Diffusion Control High-temperature Creep Metal-matrix Composites Dislocation Climb Hard Particles Al Composite Alloy Model
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WOS记录号	WOS:000081149700029
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37621
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. J. Zhu,L. M. Peng,Q. Zhou,et al. Creep behaviour of aluminium strengthened by fine aluminium carbide particles and reinforced by silicon carbide particulates - DS Al-SiC/Al4C3 composites[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,1999,268(1-2):236-245.
APA	S. J. Zhu,L. M. Peng,Q. Zhou,Z. Y. Ma,K. Kucharova,&J. Cadek.(1999).Creep behaviour of aluminium strengthened by fine aluminium carbide particles and reinforced by silicon carbide particulates - DS Al-SiC/Al4C3 composites.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,268(1-2),236-245.
MLA	S. J. Zhu,et al."Creep behaviour of aluminium strengthened by fine aluminium carbide particles and reinforced by silicon carbide particulates - DS Al-SiC/Al4C3 composites".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 268.1-2(1999):236-245.