SPS烧结B_(4)C/2024Al复合材料腐蚀性能研究  

Investigation on the Corrosion Performance of Spark Plasma Sintered B_(4)C/2024A1 Composites

作　　者：李鹏伟 吕芳聪 吴加城 李慧中[3] LI Pengwei;LYU Fangcong;WU Jiacheng;LI Huizhong(School of Mechanical Engineering,Xi’an Jiaotong University,Xi'an 710049,China;School of Mechanical Engineering,Hunan Institute of Science and Technology,Yueyang 414000,China;School of Materials Science and Engineering,Central South University,Changsha410083,China)

机构地区：[1]西安交通大学机械工程学院,陕西西安710049 [2]湖南理工学院机械工程学院,湖南岳阳414000 [3]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《湖南有色金属》2025年第1期57-62,共6页Hunan Nonferrous Metals

基　　金：湖南省自然科学基金青年项目(2020JJ5215);电磁装备设计与制造湖南省重点实验室开放基金项目(DC202007)。

摘　　要：文章以放电等离子烧结(SPS)B_(4)C/2024Al复合材料为对象,采用电化学腐蚀和化学腐蚀方法,研究了B_(4)C增强相含量(0%wt、0.5%wt、2%wt、4%wt)对复合材料腐蚀行为的影响。结果表明,B_(4)C增强相的加入不会改变2024Al基体的腐蚀电位,但增大了其腐蚀速率。B_(4)C/2024Al复合材料在NaCl溶液中的腐蚀表现为点蚀,但随着B_(4)C含量的增加,复合材料的点蚀敏感性减弱。B_(4)C颗粒破坏Al基体表面氧化膜的连续性是其产生点蚀的主要原因,而B_(4)C颗粒阻碍腐蚀坑在基体中的连接、扩大,能在一定程度上抑制基体的点蚀。In this research,the spark plasma sintered B_(4)C/2024A1 composites were taken as the object,and the corrosion behavior of the composite was examined through electrochemical corrosion and chemical corrosion methods.The influences of B.C reinforcing phase content(0%wt,0.5%wt,2%wt,4%wt)on the corrosion behavior of the composite were investigated.The results indicate that the addition of BC reinforcing phase does not alter the corrosion potential of the 2024 Al matrix,but enhances its corrosion rate.The corrosion of the B_(4)C/2024Al composite material in NaCl solution is manifested as pitting.However,as the content of B.C increases,the pitting sensitivity of the composite material decreases.The main cause of the pitting of the matrix is that B_(4)C particles disrupt the continuity of the surface oxide film on the Al matrix.Meanwhile,B_(4)C particles hinder the connection and expansion of corrosion pits in the matrix,which can suppress the pitting of the matrix to a certain extent.

关 键 词：铝基复合材料 B_(4)C增强颗粒 腐蚀 极化曲线 

分 类 号：TG174.3[金属学及工艺—金属表面处理]