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<p>By studying the process parameters of selective laser sintering technology (SLS, laser power, scanning speed, scanning space, and layer thickness), the changing law of physical and mechanical properties of SiC<sub>W</sub>/SiC composite green bodies prepared from multi-component powders was analyzed. It was found that when SiC particles of different particle size ranges (20-40&#xa0;µm, 40-60&#xa0;µm, 60-80&#xa0;µm, 80-100&#xa0;µm), polycarbosilane (PCS), epoxy resin (E-12), and ferrocene were mixed in the ratio of 38:5:5:2 by mass, green body molding could be achieved by adjusting the process parameters of the SLS equipment. At the same time, targeted adjustments of the molding parameters of SLS and selection of SiC particles with different particle size ranges were tested. It is found that with the increase of laser power (from 15 W to 25 W), scanning speed (from 2500&#xa0;mm/s to 4500&#xa0;mm/s), scanning space (from 0.08&#xa0;mm to 0.16&#xa0;mm), and layer thickness (from 0.10&#xa0;mm to 0.18&#xa0;mm), SiC<sub>W</sub>/SiC composite green body molded by printing from different particle size ranges, the open porosity all showed a trend of decreasing and then increasing, while the density and bending strength all showed a trend of increasing and then decreasing, which showed a more obvious pattern of change. This provides some data to refine the SLS technique for forming multi-component powders or to guide the additive manufacturing approach in forming granular powders.</p> Graphical abstract <p></p>

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Study on the Molding Properties of SiCW/SiC Composite Green Body Based on the Molding Parameters of Selective Laser Sintering Technology

  • 期刊论文

  • 发表日期：

    2025年12月19日

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  • Lu Decai,
  • Liu Yang,
  • Wang Ao,
  • Fan Mingxing,
  • Lu liangliang,
  • Zhou Xinxin,
  • Cheng Su,
  • Gu Jiayang,
  • Liang Bo

摘要

By studying the process parameters of selective laser sintering technology (SLS, laser power, scanning speed, scanning space, and layer thickness), the changing law of physical and mechanical properties of SiCW/SiC composite green bodies prepared from multi-component powders was analyzed. It was found that when SiC particles of different particle size ranges (20-40 µm, 40-60 µm, 60-80 µm, 80-100 µm), polycarbosilane (PCS), epoxy resin (E-12), and ferrocene were mixed in the ratio of 38:5:5:2 by mass, green body molding could be achieved by adjusting the process parameters of the SLS equipment. At the same time, targeted adjustments of the molding parameters of SLS and selection of SiC particles with different particle size ranges were tested. It is found that with the increase of laser power (from 15 W to 25 W), scanning speed (from 2500 mm/s to 4500 mm/s), scanning space (from 0.08 mm to 0.16 mm), and layer thickness (from 0.10 mm to 0.18 mm), SiCW/SiC composite green body molded by printing from different particle size ranges, the open porosity all showed a trend of decreasing and then increasing, while the density and bending strength all showed a trend of increasing and then decreasing, which showed a more obvious pattern of change. This provides some data to refine the SLS technique for forming multi-component powders or to guide the additive manufacturing approach in forming granular powders.

Graphical abstract