Fabrication and Mechanical Property of SiC/SiC Composites  by Selective Laser Sintering Technology Combined  with Precursor Impregnation and Pyrolysis Process

ZENG Tao; ZHOU Yikai; ZHANG Kun; YU Siwen

doi:10.15938/j.jhust.2020.03.025

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Fabrication and Mechanical Property of SiC/SiC Composites by Selective Laser Sintering Technology Combined with Precursor Impregnation and Pyrolysis Process

更新时间：2026-08-31

- Fabrication and Mechanical Property of SiC/SiC Composites by Selective Laser Sintering Technology Combined with Precursor Impregnation and Pyrolysis Process
- Vol. 25, Issue 3, Pages: 163-168(2020)
- 作者机构：
  
  1. 哈尔滨理工大学建筑工程学院,哈尔滨,150080
  2. 哈尔滨理工大学材料科学与工程学院,哈尔滨,150080
- 作者简介：
- 基金信息：
- DOI：10.15938/j.jhust.2020.03.025
  CLC： TB332
- Published：2020
- 稿件说明：
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ZENG Tao, ZHOU Yikai, ZHANG Kun, et al. Fabrication and Mechanical Property of SiC/SiC Composites by Selective Laser Sintering Technology Combined with Precursor Impregnation and Pyrolysis Process[J]. 2020, 25(3): 163-168.
DOI：

ZENG Tao, ZHOU Yikai, ZHANG Kun, et al. Fabrication and Mechanical Property of SiC/SiC Composites by Selective Laser Sintering Technology Combined with Precursor Impregnation and Pyrolysis Process[J]. 2020, 25(3): 163-168. DOI： 10.15938/j.jhust.2020.03.025.

摘要

摘要:针对选择性激光烧结技术（SLS）成型陶瓷材料致密性低、力学性能差的问题，采用选择性激光烧结技术（SLS）与聚合物浸渍裂解技术（PIP）相结合的方法，以碳化硅、环氧树脂和聚碳硅烷为原料，制备SiC/SiC陶瓷基复合材料。研究选择性激光烧结工艺参数、试件尺寸精度、微观结构及弯曲性能。结果表明：通过SLS/PIP技术可有效降低碳化硅陶瓷试件的孔隙率，试件密度为2.45 g/cm3，弯曲强度达到138.28 MPa。该方法可以实现传统方法无法解决的表面及内部复杂结构碳化硅陶瓷基复合材料的制备问题。

Abstract

In order to improve the density and mechanical propertyof ceramics fabricated by selective laser sintering (SLS) process

a new methodthat combined SLS with precursor impregnation and pyrolysis (PIP) process waspresented to fabricated silicon carbide particulate/silicon carbide matrix(SiC/SiC) ceramic composites Starting with SiC powders of 17~70 μm sizes

thepreform was produced by printing epoxy binder To gain the dense composites

theSiC preforms were infiltrated with polycarbosilane liquid and pyrolyzed at 1200℃under nitrogen atmosphere for 8 repeated cycles The porosity of the specimengreatly decreased and the density reached to 245 g/cm3 after PIP processAnalysis of results and discussions of optimum printing parameters

dimensionaccuracy

microstructure and bending strength for SiC/SiC composites are alsopresented The mechanical property of the SiC/SiC composite fabricated bySLS/PIP process has been improved and its bending strength attained 13828 MPaIn addition

the netshape silicon carbide components with complex surface andinner structure were fabricated

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