Scholarlink

<p>SiC/Al composite particles with core–shell structure were prepared by high-energy ball milling and applied to the stir–casting process, aiming to overcome the key problem of poor wettability between SiC particles and aluminum melt. The influence mechanism of ball-milling parameters on the morphology and structure of composite particles was explored, and the role of composite particles in reducing the introducing difficulty of SiC particles in different ball-milling stages was compared and analyzed. The results show that forming composite particles requires a rotation speed exceeding 300 rpm, and that the particle size increases with milling time and subsequently stabilizes. After 15 h of ball milling, the system reached a steady state in which the SiC is uniformly dispersed and bonded to the matrix. Using these 15-h-milled particles in stir casting yielded an actual SiC mass fraction of 2.87&#xa0;wt%, 1.7 and 18 times higher than those obtained with 6-h-milled and unmilled SiC, respectively. Microscopy revealed an intimate SiC/Al interface with a continuous transition reaction layer.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

SiC/Al Core–Shell Composite Particles Fabricated by High-Energy Ball Milling for Enhanced Wettability in Molten Al

  • 期刊论文

  • 发表日期：

    2026年3月31日

查看全文
  • Yuhang Wang,
  • Xinlei Li,
  • Shibo Hao,
  • Shanming Wang,
  • Guangyu Yang

摘要

SiC/Al composite particles with core–shell structure were prepared by high-energy ball milling and applied to the stir–casting process, aiming to overcome the key problem of poor wettability between SiC particles and aluminum melt. The influence mechanism of ball-milling parameters on the morphology and structure of composite particles was explored, and the role of composite particles in reducing the introducing difficulty of SiC particles in different ball-milling stages was compared and analyzed. The results show that forming composite particles requires a rotation speed exceeding 300 rpm, and that the particle size increases with milling time and subsequently stabilizes. After 15 h of ball milling, the system reached a steady state in which the SiC is uniformly dispersed and bonded to the matrix. Using these 15-h-milled particles in stir casting yielded an actual SiC mass fraction of 2.87 wt%, 1.7 and 18 times higher than those obtained with 6-h-milled and unmilled SiC, respectively. Microscopy revealed an intimate SiC/Al interface with a continuous transition reaction layer.