Effects of VHPS Process on Microstructure and Properties of Short C<sub>f</sub>/2024 Composites

Wang Feizhou; Yang Ruibin; Zhang Yunjie; Tan Xinrong; Liu Xiaofang; Liu Zhongxia

doi:10.15980/j.tzzz.2017.09.020

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Effects of VHPS Process on Microstructure and Properties of Short C_f/2024 Composites
Vol. 37, Issue 9, Pages: 1002-1006(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.09.020

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[1]王飞舟,杨瑞宾,张云杰,谭欣荣,刘小方,刘忠侠.热压对短碳纤维增强2024复合材料组织和性能影响[J].特种铸造及有色合金,2017,37(09):1002-1006.

Wang Feizhou, Yang Ruibin, Zhang Yunjie, et al. Effects of VHPS Process on Microstructure and Properties of Short C_f/2024 Composites. [J]. Special Casting & Nonferrous Alloys 37(9):1002-1006(2017)
[1]王飞舟,杨瑞宾,张云杰,谭欣荣,刘小方,刘忠侠.热压对短碳纤维增强2024复合材料组织和性能影响[J].特种铸造及有色合金,2017,37(09):1002-1006. DOI： 10.15980/j.tzzz.2017.09.020.

Wang Feizhou, Yang Ruibin, Zhang Yunjie, et al. Effects of VHPS Process on Microstructure and Properties of Short C_f/2024 Composites. [J]. Special Casting & Nonferrous Alloys 37(9):1002-1006(2017) DOI： 10.15980/j.tzzz.2017.09.020.

摘要

采用真空热压烧结工艺制备了纤维长度为3mm、质量分数为3%的短碳纤维增强2024铝基复合材料。研究了热压工艺对复合材料密度、晶粒尺寸、界面结构和硬度的影响。结果表明

在450℃、50MPa下保温50min时

复合材料致密程度较高

纤维与α（Al）基体的界面结合良好

硬度达到最高。由于镀铜层提高了纤维与α（Al）基体的润湿性

镀铜短碳纤维比没有镀铜的短碳纤维对复合材料的性能提高更显著。

Abstract

3% short carbon fiber with a length of 3mm reinforced 2024 Al matrix composites were fabricated by vacuum hot press sintering（VHPS）.The effects of VHPS parameters on density

grain size

interface structure and hardness of the composites were investigated.The results reveal that the optimized VHPS processing parameters are sintered at 450 ℃ for 50 min and 50 MPa

where the specimens sintered exhibit compact structure with the desirable interface bonding between Cfandα-Al matrix

and the maximum hardness can be obtained.The improvement of mechanical properties by addition of 3% Cucoated Cfare more obvious than that of the non-coating Cfwith Cu coating on carbon fiber as a result of Cu-coating improving wettability of fiber withα-Al matrix.