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	Effect of metalloid silicon addition on densification, microstructure and thermal-physical properties of Al/diamond composites consolidated by spark plasma sintering
	Zhang, Yang1; Li, Jianwei1; Zhao, Lili2; Zhang, Hailong1; Wang, Xitao1
刊名	MATERIALS & DESIGN
	2014-11-01
卷号	63期号:NOV.页码:838-847
关键词	Metal matrix composites Metalloid silicon Densification behavior Thermal conductivity Coefficient of thermal expansion Thermal dimensional stability
ISSN号	0261-3069
其他题名	Mater. Des.
中文摘要	Aluminum matrix composites reinforced with diamond particles were consolidated by spark plasma sintering. Metalloid silicon was added (Al-Si/diamond composites) to investigate the effect. Silicon addition promotes the formation of molten metal during the sintering to facilitate the densification and enhance the interfacial bonding. Meanwhile, the alloying metal matrix precipitates the eutectic-Si on the diamond surfaces acting as the transitional part to protect the improved interface during the cooling stage. The improved interface and precipitating eutectic-Si phase are mutually responsible for the optimized properties of the composites. In this study, for the Al-Si/diamond composite with 55 vol.% diamonds of 75 mu m diameter, the thermal conductivity increased from 200 to 412 Wm(-1) K-1, and the coefficient of thermal expansion (CTE) decreased from 8.9 to 7.3 x 10(-6) K-1, compared to the Al/diamond composites. Accordingly, the residual plastic strain was 0.10 x 10(-3) during the first cycle and rapidly became negligible during the second. Additionally, the measured CTE of the Al-Si/diamond composites was more conform to the Schapery's model. (C) 2014 Elsevier Ltd. All rights reserved.
英文摘要	Aluminum matrix composites reinforced with diamond particles were consolidated by spark plasma sintering. Metalloid silicon was added (Al-Si/diamond composites) to investigate the effect. Silicon addition promotes the formation of molten metal during the sintering to facilitate the densification and enhance the interfacial bonding. Meanwhile, the alloying metal matrix precipitates the eutectic-Si on the diamond surfaces acting as the transitional part to protect the improved interface during the cooling stage. The improved interface and precipitating eutectic-Si phase are mutually responsible for the optimized properties of the composites. In this study, for the Al-Si/diamond composite with 55 vol.% diamonds of 75 mu m diameter, the thermal conductivity increased from 200 to 412 Wm(-1) K-1, and the coefficient of thermal expansion (CTE) decreased from 8.9 to 7.3 x 10(-6) K-1, compared to the Al/diamond composites. Accordingly, the residual plastic strain was 0.10 x 10(-3) during the first cycle and rapidly became negligible during the second. Additionally, the measured CTE of the Al-Si/diamond composites was more conform to the Schapery's model. (C) 2014 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Materials Science, Multidisciplinary
研究领域[WOS]	Materials Science
关键词[WOS]	ALUMINUM-MATRIX COMPOSITES ; EXPANSION BEHAVIOR ; DIAMOND/ALUMINUM COMPOSITES ; NONCONDUCTING INCLUSIONS ; ELECTRICAL-CONDUCTIVITY ; BOUNDARY CONDUCTANCE ; DIAMOND SURFACE ; SIC PARTICLES ; INTERFACE ; TI
收录类别	SCI
原文出处	://WOS:000340949300099
语种	英语
WOS记录号	WOS:000340949300099
公开日期	2014-09-30
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/11618]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yang,Li, Jianwei,Zhao, Lili,et al. Effect of metalloid silicon addition on densification, microstructure and thermal-physical properties of Al/diamond composites consolidated by spark plasma sintering[J]. MATERIALS & DESIGN,2014,63(NOV.):838-847.
APA	Zhang, Yang,Li, Jianwei,Zhao, Lili,Zhang, Hailong,&Wang, Xitao.(2014).Effect of metalloid silicon addition on densification, microstructure and thermal-physical properties of Al/diamond composites consolidated by spark plasma sintering.MATERIALS & DESIGN,63(NOV.),838-847.
MLA	Zhang, Yang,et al."Effect of metalloid silicon addition on densification, microstructure and thermal-physical properties of Al/diamond composites consolidated by spark plasma sintering".MATERIALS & DESIGN 63.NOV.(2014):838-847.

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