镍基纳米SiC-Al_2O_3复合电刷镀层的组织及性能

Structure and performance of brush-electroplated nickel-based nano SiC-Al_2O_3 composite coating

在45#钢基体上制备了n-Al2O3/Ni和n-SiC–Al2O3/Ni复合刷镀层,采用能谱仪(EDS)、X射线衍射仪(XRD)、扫描电镜(SEM)和T-11球盘式磨损试验机等设备对比研究了2种复合刷镀层的组织及性能。EDS分析结果表明,n–Al2O3/Ni复合刷镀层中纳米颗粒特征元素Al的质量分数为5.65%,n-SiC–Al2O3/Ni复合刷镀层中纳米颗粒特征元素Al的质量分数为5.63%,Si元素的质量分数为4.86%。SEM分析结果表明,与n-Al2O3/Ni复合刷镀层相比,n-SiC–Al2O3/Ni复合刷镀层的表面更加平整,组织更加细化。n-SiC–Al2O3/Ni和n-Al2O3/Ni复合刷镀层的显微硬度分别为587HV和555HV,n-SiC–Al2O3/Ni复合刷镀层的耐磨性是n-Al2O3/Ni复合刷镀层的1.7倍。

Brush electroplated composite coatings of n-Al2O3/Ni and n-SiC-Al2O3/Ni were prepared on 45# steel matrix. A comparative study of the structure and performance of the two brush electroplated composite coatings was characterized by SEM, XRD, EDS and T-11 ball-on-disc wear tester. The EDS results showed that the content of Al element was 5.65% in the n-Al2O3/Ni brush electroplated composite coating, while in n-SiC-Al2O3/Ni brush electroplated composite coating, the contents of Al and Si elements were 5.63% and 4.86% respectively. SEM results showed that the surface and the structure of n-SiC-Al2O3/Ni brush electroplated composite coating were more smooth and compact than that of n-Al2O3/Ni brush electroplated composite coating. The microhardness of n-SiC-Al2O3/Ni and n-Al2O3/Ni brush electroplated composite coating was587 HV and 555 HV respectively, and the wear resistance of n-SiC-Al2O3/Ni brush electroplated composite coating was 1.7 times of that of n-Al2O3/Ni brush electroplated composite coating.