| 含先驱体聚合物浆料浇注成型制备SiC多孔陶瓷 |
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| 引用本文： | 刘坚,许云书,熊亮萍,徐光亮.含先驱体聚合物浆料浇注成型制备SiC多孔陶瓷[J].材料科学与工程学报,2009(4). |
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| 作者姓名： | 刘坚 许云书 熊亮萍 徐光亮 |
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| 作者单位： | 中国工程物理研究院核物理与化学研究所;西南科技大学材料科学与工程学院; |
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| 基金项目： | 中国工程物理研究院科学技术基金重大资助项目(2004Z0502) |
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| 摘 要： | 采用SiC粉体与聚碳硅烷(PCS)为原料浇注成型低温烧结制备SiC多孔陶瓷,研究了PCS含量对SiC多孔陶瓷性能的影响。结果表明,PCS含量大于2wt%时可浇注成型,PCS经烧结后生成裂解产物将SiC颗粒粘结起来。所得SiC多孔陶瓷孔径呈单峰分布、孔径分布窄、热膨胀系数低、烧结过程中线收缩率小。随着PCS含量的增大烧成SiC多孔陶瓷的孔隙率降低,但强度显著提高。PCS含量为6wt%时多孔陶瓷的孔隙率、弯折强度和线收缩率分别为36.2%、33.8MPa和0.42%。
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| 关 键 词： | 浇注成型 多孔陶瓷 碳化硅 先驱体聚合物 |
Fabrication of Porous SiC Ceramics by Precursor Polymer-contained Slurry Slip Casting Method |
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| LIU Jian,XU Yun-shu,XIONG Liang-ping,XU Guang-liang.Fabrication of Porous SiC Ceramics by Precursor Polymer-contained Slurry Slip Casting Method[J].Journal of Materials Science and Engineering,2009(4). |
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| Authors: | LIU Jian XU Yun-shu XIONG Liang-ping XU Guang-liang |
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| Affiliation: | LIU Jian~(1,2),XU Yun-shu~1,XIONG Liang-ping~1,XU Guang-liang~2(1.Institute of Nuclear Physics , Chemistry,China Academic of Engineering Physics,Mianyang 621900,China,2.School of Material Science , Engineering,Southwest University of Science , Technology,Mianyang 621010,China) |
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| Abstract: | SiC micropowder and polycarbosilane(PCS) were adopted as the starting materials,shaped by the slip casting method and then sintered at low temperature to obtain porous SiC ceramics.Effect of PCS content on the properties of porous SiC ceramics was studied.Results show that the slurry can be shaped when the PCS content is over 2wt% and the SiC particles are bonded by PCS pyrolysis products.The as-fabricated porous SiC ceramics exhibit a unimodal and narrow pore size distribution,high fracture strength,low co... |
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| Keywords: | slip casting porous ceramics SiC precursor polymer |
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