Enhanced wetting and properties of carbon/carbon-Cu composites with Cr3C2 coatings by Cr-solution immersion method

被引：1

作者：

Bo Kong ^{[1
]}

Jinming Ru ^{[2
]}

Hongdi Zhang ^{[1
]}

Tongxiang Fan ^{[1
]}

机构：

[1] State Key Laboratory for Metal Matrix Composite, Shanghai Jiaotong University

[2] Institute of Advanced Manufacturing and Modern Equipment Technology, Jiangsu University

来源：

JournalofMaterialsScience&Technology | 2018年 / 34卷 / 03期

关键词：

Enhanced wetting and properties of carbon/carbon-Cu composites with Cr3C2 coatings by Cr-solution immersion method; Cr; Cu;

D O I：

暂无

中图分类号：

TB306 [];

学科分类号：

0805 ; 080502 ;

摘要：

A facile ammonium-dichromate solution immersion method was introduced to synthesize the copperwettable CrCcoating on and inside the carbon-carbon(C/C) preform. The formation mechanism and the microstructures of the CrCcoatings were studied. The contact angle between molten copper and the C/C decreased from 140? to 60?, demonstrating the significant improvement in the wettability. The CrC-coated C/C-Cu composite with only 4.2% porosity and 3.69 g cmdensity was manufactured through copper infiltration. As a result, the thermal and electrical conductivity of the modified C/C-Cu increased significantly due to the infiltrated copper. Also the mechanical properties of the composites including both the flexural and compressive strengths were enhanced by over 100%. The modified C/C-Cu composite exhibited lower friction coefficients and wear rates for different load levels than those of the commercial C/Cu composite. These results demonstrate the potential of the modified C/C-Cu material for use in electrical contacts.

引用

页码：458 / 465

页数：8