高级检索
    王少锋, 汪长安, 孙加林, 黄勇. PVB对梯度通孔结构SiC陶瓷显微结构和性能的影响[J]. 机械工程材料, 2011, 35(12): 6-9.
    引用本文: 王少锋, 汪长安, 孙加林, 黄勇. PVB对梯度通孔结构SiC陶瓷显微结构和性能的影响[J]. 机械工程材料, 2011, 35(12): 6-9.
    shu
    WANG Shao-feng, WANG Chang-an, SUN Jia-lin, HUANG Yong. Effect of PVB on Microstructure and Properties of SiC Ceramics with Gradient Pore Channel Structure[J]. Materials and Mechanical Engineering, 2011, 35(12): 6-9.
    Citation: WANG Shao-feng, WANG Chang-an, SUN Jia-lin, HUANG Yong. Effect of PVB on Microstructure and Properties of SiC Ceramics with Gradient Pore Channel Structure[J]. Materials and Mechanical Engineering, 2011, 35(12): 6-9.
    shu

    PVB对梯度通孔结构SiC陶瓷显微结构和性能的影响

    Effect of PVB on Microstructure and Properties of SiC Ceramics with Gradient Pore Channel Structure

      摘要
    • 摘要: 将叔丁醇(TBA)、聚乙烯醇缩丁醛(PVB)和SiC粉及烧结助剂配制成陶瓷浆料, 通过定向冷冻和低温真空干燥的方法制备了具有梯度通孔结构的SiC陶瓷;研究了PVB含量对梯度通孔结构SiC陶瓷孔隙率、显微结构和力学性能的影响。结果表明: 随PVB含量的增加, 梯度通孔结构SiC陶瓷的孔径逐渐变小, 抗压缩强度明显增大, 开孔率变化不大;含PVB体积分数为3% 的SiC陶瓷坯体, 通过1 400 ℃的烧结, 其开孔率为62.4%, 轴向抗压强度可达87.5 MPa。

       

      Abstract: SiC ceramics with gradient pore channel structure were fabricated by directional freeze-casting and low temperature vacuum drying method. A slurry was selected, which consisted of tert-butyl alcohol(TBA), polyvinyl butyral(PVB), SiC powders and sintering additives. Effect of PVB content on porosity, microstructure and mechanical properties of the SiC ceramics with gradient pore channel structure was studied. The results show that pore size gradually decreased and compressive strength of the SiC ceramics increased with the increase of PVB content, but open porosity had little change. The SiC ceramics containing 3vol% PVB sintered at 1 400 ℃ had an axial compressive strength of 87.5 MPa and a porosity of 62.4%.

       

      • HTML全文
      • 参考文献(10)
      • 相关文章
      • 施引文献
    • 资源附件(0)

    /

    返回文章
    返回