Scholarlink

<p>Porous alumina ceramics have irreplaceable application potential in the refractory and thermal insulation materials industry owing to their excellent high-temperature resistance and thermal insulation properties. However, traditional preparation methods generally suffer from limitations such as low molding accuracy and poor process controllability, failing to meet the industry’s demand for high-performance porous ceramics. As a flexible additive manufacturing technology, selective laser sintering (SLS) provides a novel pathway for the precision fabrication of porous ceramics. This study aims to efficiently prepare porous alumina ceramics via SLS. Using alumina (Al₂O₃) powder as the ceramic matrix and phenolic resin (PF) as the binder, PF-coated Al₂O₃ composite powder was prepared by the thermal coating method. Subsequently, SLS process parameters were systematically optimized via single-factor experiments combined with response surface methodology (RSM), yielding porous alumina precursors with excellent dimensional accuracy and density. Finally, the target porous ceramics were obtained by high-temperature sintering. The results show that the optimal SLS parameters are: laser power 24 W, scanning speed 1744 mm/s, scanning spacing 0.125 mm, and layer thickness 0.15 mm. Under these parameters, the precursor has a density of 1.79 g/cm<sup>3</sup>, with dimensional accuracies of 99.23%, 98.80%, and 93.17% along the X, Y, and Z directions, respectively. After sintering at 1550 °C, mercury intrusion porosimetry (MIP) characterization showed the porous alumina ceramics have a porosity of 55.7% and an average pore size of 28.85 μm. This study proposes a novel strategy for fabricating high-precision porous ceramic materials for applications in the refractory industry.</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

Study on process and parameter optimization of selective laser sintering of PF-coated Al2O3 composite

  • 期刊论文

  • 发表日期：

    2026年3月9日

查看全文
  • Jian Li,
  • Guoliang Liu,
  • Wen Zhao,
  • Pengfei Du,
  • Yanling Guo

摘要

Porous alumina ceramics have irreplaceable application potential in the refractory and thermal insulation materials industry owing to their excellent high-temperature resistance and thermal insulation properties. However, traditional preparation methods generally suffer from limitations such as low molding accuracy and poor process controllability, failing to meet the industry’s demand for high-performance porous ceramics. As a flexible additive manufacturing technology, selective laser sintering (SLS) provides a novel pathway for the precision fabrication of porous ceramics. This study aims to efficiently prepare porous alumina ceramics via SLS. Using alumina (Al₂O₃) powder as the ceramic matrix and phenolic resin (PF) as the binder, PF-coated Al₂O₃ composite powder was prepared by the thermal coating method. Subsequently, SLS process parameters were systematically optimized via single-factor experiments combined with response surface methodology (RSM), yielding porous alumina precursors with excellent dimensional accuracy and density. Finally, the target porous ceramics were obtained by high-temperature sintering. The results show that the optimal SLS parameters are: laser power 24 W, scanning speed 1744 mm/s, scanning spacing 0.125 mm, and layer thickness 0.15 mm. Under these parameters, the precursor has a density of 1.79 g/cm3, with dimensional accuracies of 99.23%, 98.80%, and 93.17% along the X, Y, and Z directions, respectively. After sintering at 1550 °C, mercury intrusion porosimetry (MIP) characterization showed the porous alumina ceramics have a porosity of 55.7% and an average pore size of 28.85 μm. This study proposes a novel strategy for fabricating high-precision porous ceramic materials for applications in the refractory industry.