论文部分内容阅读
采用激光粒子注入/熔覆方法制备了SiCp/Al颗粒增强表面材料,所用的材料为绿色的SiCp粉末,基体为LY12铝材.激光功率为1000~1200 W,速度为3 0 mm/s,送粉量为5~10 g/min.采用扫描电镜(SEM),能谱仪器(EDX)和X射线衍射仪(XRD)研究了SiCp/Al复合表面层结构.结果发现其主要相为SiCp和Al,并含有少量的Al4SiC4 和Si.SiC颗粒均匀分布于Al基体中.激光层中的SiCp粒子具有3C,6H和5H三种晶形,其中3C和6H为SiCp的两种原始晶形,并发现了激光作用下新产生的5H晶形.
The SiCp / Al particle reinforced surface material was prepared by laser particle implantation / cladding method. The material used was green SiCp powder and the substrate was LY12 aluminum. The laser power was 1000 ~ 1200 W and the velocity was 30 mm / s The amount of powder was 5 ~ 10 g / min.The structure of SiCp / Al composite surface layer was investigated by scanning electron microscope (SEM), energy dispersive spectrometer (EDX) and X-ray diffraction (XRD) , And contains a small amount of Al4SiC4 and Si.SiC particles uniformly distributed in the Al matrix.The SiCp particles in the laser layer has 3C, 6H and 5H three crystal forms, of which 3C and 6H SiCp two original crystal form and found the laser 5H role under the new crystal form.