Cu基表面机械合金化制备W颗粒增强复合层的研究

Fabrication of W particle reinforced composite layer on copper substrate via mechanical alloying method

摘要:

采用高能行星球磨机在纯铜基体表面制备了具有一定厚度的W颗粒增强复合层。采用SEM、EDS、XRD和显微硬度测试等分析测试技术分析了不同球磨时间下得到的复合层的沉积过程及复合层的显微组织及力学性能，并对复合层的形成机理进行了探讨。结果表明，颗粒增强复合层的厚度在一定球磨时间内达到最大值，之后不再随着球磨时间的增加而增加。然而适当延长球磨时间能改善复合层内增强颗粒和基体间的结合强度，并在一定程度上改善W层的致密度。

Abstract:

High-energy planetary ball mill was applied to fabricate W particle reinforced composite layer in the surface of pure copper substrate. Scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS) and micro-hardness test technique were used to investigate the microstructure and mechanical properties of the coatings prepared at different milling time, and then the mechanism of the formation of the coatings were studied. The results showed that the thickness of the particle reinforced layer reached the maximum within a certain milling time at the selected milling parameters. However, the bongding between reinforcing particles and substrate could be enhanced through appropriate extension of milling duration, which would simultaneously facilitate the densification in the composite layer.