Exploring the size effects of Al4C3 on the mechanical properties and thermal behaviors of Al-based composites reinforced by SiC and carbon nanotubes

被引：182

作者：

Guo, Baisong ^{[1
]}

Chen, Biao ^{[2
]}

Zhang, Xinming ^{[3
]}

Cen, Xi ^{[3
]}

Wang, Xinhua ^{[1
]}

Song, Min ^{[1
]}

Ni, Song ^{[1
]}

Yi, Jianhong ^{[4
]}

Shen, Tao ^{[4
]}

Du, Yong ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

[3] Univ Calif Davis, Dept Mat Sci & Engn, Davis, CA 95616 USA

[4] Kunming Univ Sci & Technol, Sch Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China

来源：

CARBON | 2018年 / 135卷

基金：

中国国家自然科学基金;

关键词：

ALUMINUM-MATRIX COMPOSITES; EXPANSION BEHAVIOR; INTERFACIAL REACTION; LOAD-TRANSFER; NANOCOMPOSITES; NANOPARTICLES; FABRICATION; PARTICLES;

D O I：

10.1016/j.carbon.2018.04.048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, the effects of aluminum carbide (Al4C3) on the mechanical properties and thermal behaviors of Al based composites reinforced by SiC and carbon nanotubes (CNTs) were investigated. The formation of Al4C3 was precisely controlled in the temperature range from 530 degrees C to 630 degrees C (80%-95% of the Al melting point) during the post heat treatment. Microscopy observations revealed that Al4C3 rods are originated from CNTs instead of SiC particles. Quantity and size of Al4C3 are highly dependent on the heat treatment temperature. It was found that the mechanical properties of the Al based composites were significantly affected by the size of Al4C3. Moreover, the formation of Al4C3 helps to decrease the coefficient of thermal expansion (CTE) of the composites due to the consumption of Al and the enhanced interfacial bonding. This study provides a potential approach for ameliorating the mechanical and thermal performances of CNTs reinforced metal matrix composites. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：224 / 235

页数：12

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