A cost-effective route to produce Al/AlN composites with low coefficient of thermal expansion

被引：4

作者：

Lee, Kon-Bae ^{[1
]}

Yoo, Seong-Hyeon ^{[1
]}

Kim, Yong-Hwan ^{[2
]}

Han, Chul-Woong ^{[2
]}

Won, Sung-Ok ^{[3
]}

Ahn, Jae-Pyung ^{[3
]}

Choi, Hyun-Joo ^{[1
]}

机构：

[1] Kookmin Univ, Sch Adv Mat Engn, 77 Jeongneung Ro, Seoul 136702, South Korea

[2] Korea Inst Ind Technol KITECH, Rare Met R&D Grp, Cheonan, South Korea

[3] KIST, Adv Anal Ctr, 5 Hwarang Ro 14 Gil, Seoul 02792, South Korea

来源：

JOURNAL OF COMPOSITE MATERIALS | 2017年 / 51卷 / 20期

基金：

新加坡国家研究基金会;

关键词：

Composite materials; in situ reaction; aluminum nitridation; lamp carbon; METAL-MATRIX COMPOSITES; MECHANICAL-PROPERTIES; ALNP/AL COMPOSITE; ALUMINUM; CONDUCTIVITY; POWDER; TEMPERATURE; NITRIDATION;

D O I：

10.1177/0021998317716528

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

In this study, a novel process was developed to produce Al/AlN composites by infiltrating molten Al ingot into a mixture of Al and lamp carbon powders. The findings revealed that, during the process, Al2O3 on the surface of Al powder reacted with nitrogen gas and was transformed to AlN. The degree of nitridation was greatly enhanced by adding only less than 3 wt.% lamp carbon, because lamp carbon could act as a dispersion agent as well as a reduction agent. The Al-based composites containing in situ AlN phases showed coefficient of thermal expansion values of similar to 11 x 10(-6)/degrees C, which were comparable to those of composites containing 60% ex situ AlN particles.

引用

页码：2845 / 2851

页数：7

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