摘要
以SiO2-Al2O3系玻璃与Cr2O3陶瓷粉末为原料,采用高温烧结、球磨破碎工艺制备玻璃态物质包覆Cr2O3陶瓷颗粒的玻璃-Cr2O3陶瓷复合粉末,利用氧-乙炔火焰热喷涂技术在45号钢表面喷涂SiO2-Al2O3-Cr2O3玻璃陶瓷保护涂层。利用扫描电镜(SEM)对SiO2-Al2O3-Cr2O3玻璃陶瓷粉末与涂层的微观形貌进行表征。采用粘接拉伸法检测涂层与基体的界面结合强度,在介质溶液中进行腐蚀实验,研究玻璃与陶瓷粉末的配比对涂层微观结构与性能的影响。研究表明:当SiO2-Al2O3系玻璃的含量(质量分数)为40%时,涂层具有较好的综合性能,与基体的结合强度达30.4MPa,在10%CH3COOH溶液(体积分数)、8%NaOH溶液(质量分数)和3.5%NaCl溶液(质量分数)中腐蚀120 h的腐蚀速率分别为112.6、87.1和83.1 mg/(h.m2)。
SiO2-Al2O3-Cr2O3 composite material homogenized and mixed in a planetary ball mill and subsequently sintered at 1 000 ℃ were prepared. Oxygen-acetylene flame thermal spraying technology was used to coat the surface of 45 steel in order to improve its properties. Microstructre morphologies of the composite powder and coating were characterized by scanning electron microscopy （SEM）.Tensile test method was adopted to detect the bonding strength between coatings and substrate. The samples were immersed into the medium solution to examine the corrosion resistance of the coating. The results show that the coating of the sample with 40% SiO2-Al2O3 （mass fraction） exhibites optimal comprehensive properties of the bonding strength 30.4 MPa and the corrosion rate of 112.6, 87.1 and 83.1 mg/（h·m^2） in the corrosion solution consisting of 10% CH3COOH （volume fraction）, 8% NaOH （mass fraction） and 3.5% NaCl （mass fraction）, respectively.
出处
《粉末冶金材料科学与工程》
EI
北大核心
2012年第6期761-766,共6页
Materials Science and Engineering of Powder Metallurgy
基金
中国核动力院运行基金资助项目(2010SYS01)
湖南省高校科技创新团队支持计划资助项目
关键词
热喷涂
涂层
结合性能
耐蚀性
thermal spraying
coating
property of bonding
corrosion-resistance
