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材料导报  2020, Vol. 34 Issue (Z2): 381-385    
  金属与金属基复合材料 |
表面氧化处理对SiC/A356 Al复合材料组织及性能的影响
路建宁1,2, 王娟1,2, 林颖菲1,3, 郑开宏1, 王海艳1,3
1 广东省科学院材料与加工研究所,广州 510650
2 广东越科新材料有限公司,梅州 514768
3 梅州市粤科新材料与绿色制造研究院,梅州 514768
Effect of Surface Oxidation Treatment on the Structure and Properties of SiC/A356 Al Composites
LU Jianning1,2, WANG Juan1,2, LIN Yingfei1,3, ZHENG Kaihong1, WANG Haiyan1,3
1 Guangdong Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou 510650, China
2 Guangdong Yueke New Material Co., Ltd., Meizhou 514768, China
3 Institute of Meizhou Yueke New Materials and Green Manufacturing, Meizhou 514768, China
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摘要 采用模压成形工艺结合压力浸渗法制备了SiC/A356 Al复合材料,利用XRD、SEM和EDS等分析了SiC颗粒氧化处理前后的物相组成、组织形貌及粒度分布,研究了原始/氧化SiC颗粒对复合材料界面组织、抗弯强度、线膨胀系数及热导率的影响;通过SEM分析了该复合材料的断口形貌,并探讨了其断裂机制。结果表明,采用该方法可获得颗粒均匀分散、界面洁净、接近全致密的SiC/A356 Al复合材料。表面氧化处理包覆在SiC颗粒表面的SiO2能够有效抑制Al4C3脆性相的生成,但也使得SiC与A356之间由化学反应结合转变为冶金结合,导致复合材料的弯曲强度大幅降低,线膨胀系数略有降低,同时复合材料的热导率显著提高。氧化SiC颗粒增强的复合材料的抗弯强度是增强相为原始SiC颗粒的复合材料1/2左右,线膨胀系数在30~350 ℃范围内仅降低了(0.59~0.99)×10-6 K-1,热导率提高了42.86%。
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路建宁
王娟
林颖菲
郑开宏
王海艳
关键词:  表面氧化处理  SiC/A356,Al  界面组织  抗弯强度  热性能    
Abstract: The SiC/A356 Al composites were prepared by compression molding process and pressure infiltration method. XRD, SEM and EDS were used to characterize the phase composition, microstructure and particle size distribution of SiC particles before and after oxidation treatment, the effects of the raw/oxidized SiC particle on the interfacial structure, flexural strength, linear expansion coefficient and thermal conductivity of the composites were studied. The fracture morphology of the composite was analyzed by SEM and its fracture mechanism was discussed. The results show that the SiC/A356 composites with uniform dispersion of SiC particles, clean interface and nearly complete compactness can be obtained by this method. The SiO2 film formed on the surface of SiC particle by surface oxidation treatment can effectively inhibit the formation of Al4C3 brittle phases, but it also causes the chemical reaction combination between SiC and A356 to transform into metallurgical combination, resulting in a marked decrease in the bending strength and a slight reduction in the linear expansion coefficient of the as-prepared specimens, the thermal conductivity of the composites is significantly improved at the same time. Particularly, compared to composite where the reinforcing phase is the raw SiC particles, the bending strength of the oxidized SiC particle reinforced composite is approximately 1/2, the coefficient of linear expansion is only reduced (0.59-0.99)×10-6 K-1 in the range of 30—350 ℃, and the thermal conductivity increased by 42.86%.
Key words:  surface oxidation treatment    SiC/A356 Al    interfacial microstructure    bending strength    thermal properties
               出版日期:  2020-11-25      发布日期:  2021-01-08
ZTFLH:  TB331  
基金资助: 广东省科学院建设国内一流研究机构行动专项(2019GDASYL-0501014;2019GDASYL-0104024;2019GDASYL-0502009);广东省科技计划项目(2017A070701029);广东省科技创新战略专项(2018dr013;2018dr005)
通讯作者:  sweetanna@foxmail.com   
作者简介:  路建宁,工程师。2010年9月至2017年6月在中南大学获得材料科学与工程专业工学学士学位和材料工程专业工学硕士学位。以第一作者在国内外学术期刊上发表论文2篇,申请国家发明专利5项,其中授权2项。研究工作主要围绕陶瓷增材制造、颗粒增强铝基复合材料方面的研究工作,包括材料设计、组织表征、热力学性能及机制的研究。作为主要人员参与广州市科技计划项目、广东省科学院研发项目,作为一般人员参与省、市及院内多项研发项目。王娟,教授级高级工程师。2017年当选为“广东特支计划”科技创新青年拔尖人才。主要从事高性能陶瓷增强金属基复合材料的制备及其产业化应用研究,并围绕钢铁耐磨材料、先进结构陶瓷、界面连接、复合焊料、材料基因工程等方向开展科研工作。主持/参与国家、省、市科研项目50余项,项目经费累计超过3 000万元。发表论文30余篇,出版专著1部。牵头或参与制订国家标准、团体标准及企业标准11件。申请发明专利60件,获得授权发明专利33件。获得广东省专利金奖、广东省科技进步一等奖、中国有色工业科学技术一等奖等各级别奖项8件。
引用本文:    
路建宁, 王娟, 林颖菲, 郑开宏, 王海艳. 表面氧化处理对SiC/A356 Al复合材料组织及性能的影响[J]. 材料导报, 2020, 34(Z2): 381-385.
LU Jianning, WANG Juan, LIN Yingfei, ZHENG Kaihong, WANG Haiyan. Effect of Surface Oxidation Treatment on the Structure and Properties of SiC/A356 Al Composites. Materials Reports, 2020, 34(Z2): 381-385.
链接本文:  
http://www.mater-rep.com/CN/  或          http://www.mater-rep.com/CN/Y2020/V34/IZ2/381
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