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材料工程  2019, Vol. 47 Issue (4): 160-166    DOI: 10.11868/j.issn.1001-4381.2018.000351
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
碳化硅颗粒表面吸附质对铝基复合材料制备及力学性能的影响
崔岩, 项俊帆, 曹雷刚, 杨越, 刘园
北方工业大学 材料科学与工程系, 北京 100144
Effect of the surface adsorbate of SiC particles on fabrication and mechanical property of aluminum matrix composite
CUI Yan, XIANG Jun-fan, CAO Lei-gang, YANG Yue, LIU Yuan
Department of Materials Science and Engineering, North China University of Technology, Beijing 100144, China
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摘要 选用粒度为60~80μm的国产磨料级碳化硅颗粒作为增强体、以无压浸渗法制备高体份SiCp/Al复合材料,采用超声清洗工艺对比研究颗粒表面吸附质对颗粒浸渗性以及复合材料力学性能的影响。结果表明:国产磨料级碳化硅颗粒表面普遍存在少量吸附质(<0.5%),吸附质以粒度更小(<5μm)的碳化硅颗粒为主,个别情况含有少量的游离碳。颗粒表面吸附质的存在严重影响了颗粒表面与熔融铝液的润湿性,并且会大幅度降低复合材料的密度和力学性能。超声清洗工艺可以有效去除碳化硅颗粒表面的吸附质,去除吸附质之后颗粒的浸渗成功率从25%提升至100%,复合材料的抗弯强度从320MPa提升至390MPa,弹性模量从203GPa提升至232GPa。
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崔岩
项俊帆
曹雷刚
杨越
刘园
关键词 碳化硅吸附质超声清洗力学性能    
Abstract:SiCp/Al composites were prepared by pressureless infiltration using domestic abrasive grade SiC particles with average diameters in the range of 60-80μm. Ultrasonic cleaning method was used to investigate the effect of the surface adsorbate of SiC particles on the infiltration process and mechanical property of the SiCp/Al composite. The results show that all types of the studied SiC particles are adhered by low mass fractions of the adsorbate(<0.5%),comprising mainly fine SiC particles(<5μm)and,in certain cases,low fraction of carbon. That surface adsorbate has a negative effect on the wettability between SiC particles and molten alloy,resulting in the reduced density and mechanical property of the infiltrated SiCp/Al composite. Ultrasonic cleaning process can effectively wipe off the adsorbate,and,by using the cleaned SiC particles,the success rate of the infiltration can be raised from 25% to 100%. Correspondingly, the flexure strength and elasticity modulus of the composites are improved from 320MPa to 390MPa and from 203GPa to 232GPa, respectively.
Key wordssilicon carbide    adsorbate    ultrasonic cleaning    mechanical property
收稿日期: 2018-03-30      出版日期: 2019-04-19
中图分类号:  TB333.1+2  
通讯作者: 崔岩(1969-),男,研究员,工学博士,长期从事金属基复合材料研究,联系地址:北京市石景山区晋元庄路5号北方工业大学材料科学与工程系(100144),E-mail:cuiyan@ncut.edu.cn     E-mail: cuiyan@ncut.edu.cn
引用本文:   
崔岩, 项俊帆, 曹雷刚, 杨越, 刘园. 碳化硅颗粒表面吸附质对铝基复合材料制备及力学性能的影响[J]. 材料工程, 2019, 47(4): 160-166.
CUI Yan, XIANG Jun-fan, CAO Lei-gang, YANG Yue, LIU Yuan. Effect of the surface adsorbate of SiC particles on fabrication and mechanical property of aluminum matrix composite. Journal of Materials Engineering, 2019, 47(4): 160-166.
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