[1]曹雷刚,王晓荷,崔岩,等.基体铝合金成分对无压浸渗B4C/Al复合材料微观组织和力学性能的影响[J].中国材料进展,2020,(2):156-162.[doi:10.7502/j.issn.1674-3962.201809018]
　CAO Leigang,WANG Xiaohe,CUI Yan,et al.The Effect of Matrix Aluminum Alloy Composition on Microstructure and Mechanical Properties of B4C/Al Composites by Pressureless Infiltration[J].MATERIALS CHINA,2020,(2):156-162.[doi:10.7502/j.issn.1674-3962.201809018]
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基体铝合金成分对无压浸渗B4C/Al复合材料微观组织和力学性能的影响()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2020年第2期
页码:
156-162
栏目:
出版日期:
2020-02-29

文章信息/Info

Title:
The Effect of Matrix Aluminum Alloy Composition on Microstructure and Mechanical Properties of B4C/Al Composites by Pressureless Infiltration
文章编号:
1674-3962(2020)02-0156-07
作者:
曹雷刚1; 王晓荷1; 崔岩1; 张龙龙2; 杨越1; 刘园1
（1. 北方工业大学机械材料与工程学院，北京 100144）（2. 大连理工大学机械工程学院，辽宁 大连 116024）
Author(s):
CAO Leigang1;  WANG Xiaohe1;  CUI Yan1;  ZHANG Longlong2;  YANG Yue1;  LIU Yuan1
（1.Department of Materials Science and Engineering, North China University of Technology, Beijing 100144, China）（2. School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China）
关键词:
碳化硼; 复合材料; 无压浸渗; 界面反应; 力学性能
Keywords:
boron carbide;  composite;  pressureless infiltration;  interfacial reaction;  mechanical property
分类号:
TB333.1+2
DOI:
10.7502/j.issn.1674-3962.201809018
文献标志码:
A
摘要:
分别选用2024、5056、6061和7075铝合金，采用颗粒级配相同的碳化硼预制体（20% 2 μm和80% 38 μm）为增强体，采用无压浸渗法制备4种高体份B4C/Al复合材料（分别对应标记为2M、5M、6M和7M），研究基体合金成分对复合材料的物相组成、微观组织和力学性能的影响。结果表明，4种复合材料均含有A1、B4C、Al3BC、AlB2和富Fe-Mn相，除此之外，2M、5M和7M复合材料还含有AlB10。4种复合材料小颗粒碳化硼聚集区均发生了剧烈的界面反应，生成Al3BC和AlB2。AlB10主要分布于2M、5M和7M复合材料的大颗粒碳化硼周围，并与大颗粒碳化硼连成一体。4种复合材料的洛氏硬度从大到小顺序为2M（45.7）、7M（43.1）、5M（41.8）和6M（40.02）。2M、5M和7M复合材料内部发现有孔洞存在，导致复合材料弯曲强度和应力均较低。这种效应在7M复合材料中最为明显，其弯曲强度仅为296 MPa。6M复合材料弯曲强度和应变最高，分别为425 MPa和0.183%，这主要是因为在6M复合材料中，不含AlB10相且残余铝合金相对含量较高。
Abstract:
Four kinds of high volume fraction B4C/Al composites were prepared by pressureless infiltration using four different aluminum alloys (2024Al, 5056Al, 6061Al and 7075Al) and B4C preform with the same particlesize distributions ( 20% 2 μm and 80% 38 μm ), which were named as 2M, 5M, 6M, and 7M, respectively. The effect of matrix alloy composition on the phase composition, microstructure and mechanical properties of the composites was investigated. The results show that all of the composites contain A1, B4C, Al3BC, AlB2, and Fe-Mn-rich phases. Besides, 2M, 5M, and 7M composites also contain the additional phase, AlB10. For all of the composites, the severe interfacial reaction occurred in the aggregation areas of the small B4C particle, with the formation of Al3BC and AlB2. AlB10 is mainly distributed around large B4C particles in 2M, 5M and 7M composites and is integrated with large B4C particles. The Rockwell hardness of the four composites decreased in the sequence 2M (45.7), 7M (43.1), 5M (41.8) and 6M (40.02). The micropores are observed in the 2M, 5M, and 7M composites, resulting in the decrease of the flexural strength and fracture strain of the corresponding composites. Accordingly, 7M composite possesses the lowest flexural strength, being about 296 MPa. Conversely, the flexural strength and fracture strain of the 6M composite are the highest, being about 425 MPa and 0.183%, respectively. This could be mainly attributed to the absence of AlB10 phase and the highest fraction of the residual aluminum matrix in the 6M composite.

备注/Memo

备注/Memo:
收稿日期：2018-09-20修回日期：2019-07-21 基金项目：国家重点研发计划课题项目（2017YFB0703102）第一作者：曹雷刚，男，1985年生，讲师通讯作者：崔岩，男，1969年生，教授，硕士生导师， Email:cuiyan@ncut.edu.cn
更新日期/Last Update: 2020-01-15