Fabrication and Mechanical Property of SiC/SiC Composites by Selective Laser Sintering Technology Combined with Precursor Impregnation and Pyrolysis Process
In order to improve the density and mechanical property of ceramics fabricated by selective laser sintering (SLS) process, a new method that combined SLS with precursor impregnation and pyrolysis (PIP) process was presented to fabricated silicon carbide particulate/silicon carbide matrix (SiC/SiC) c...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2020-06-01
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| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1789 |
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| Summary: | In order to improve the density and mechanical property of ceramics fabricated by selective laser sintering (SLS) process, a new method that combined SLS with precursor impregnation and pyrolysis (PIP) process was presented to fabricated silicon carbide particulate/silicon carbide matrix (SiC/SiC) ceramic composites Starting with SiC powders of 17~70 μm sizes, the preform was produced by printing epoxy binder To gain the dense composites, the SiC preforms were infiltrated with polycarbosilane liquid and pyrolyzed at 1200℃ under nitrogen atmosphere for 8 repeated cycles The porosity of the specimen greatly decreased and the density reached to 245 g/cm3 after PIP process Analysis of results and discussions of optimum printing parameters, dimension accuracy, microstructure and bending strength for SiC/SiC composites are also presented The mechanical property of the SiC/SiC composite fabricated by SLS/PIP process has been improved and its bending strength attained 13828 MPa In addition, the netshape silicon carbide components with complex surface and inner structure were fabricated |
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| ISSN: | 1007-2683 |