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Effect of SiC particles on the laser sintering of Al-7Si-0.3Mg alloy

Simchi, A ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1016/j.scriptamat.2008.03.007
  3. Publisher: 2008
  4. Abstract:
  5. The direct laser sintering of Al-7Si-0.3Mg/SiC composites was studied. It is shown that the densification rate obeys first-order kinetics. The rate constant is found to increase at low SiC fractions but abruptly decreases at >∼5 vol.%. In the presence of ceramic particles, the melt track becomes more stable and a more continuous sintered surface is obtained. Meanwhile, significant reaction occurs between the aluminum melt and the reinforcement particles, leading to formation of Al4SiC4 and silicon particles. The solidification microstructure is also altered. © 2008 Acta Materialia Inc
  6. Keywords:
  7. Aluminum alloys ; Composite materials ; Laser applications ; Microstructure ; Sintering ; Solidification ; Aluminum melt ; First-order kinetics ; Reinforcement particles ; Silicon carbide
  8. Source: Scripta Materialia ; Volume 59, Issue 2 , 2008 , Pages 199-202 ; 13596462 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S1359646208002248