无机材料学报 ›› 2021, Vol. 36 ›› Issue (5): 547-551.DOI: 10.15541/jim20200265

所属专题: 【虚拟专辑】增材制造及3D打印(2021-2022)

• 研究快报 • 上一篇    下一篇

采用定向SiC纳米线烧结制备高强多孔SiC陶瓷

祝泉1,2,3(), 胡建宝1,2(), 杨金山1,2, 周海军1,2, 董绍明1,2   

  1. 1.中国科学院 高性能陶瓷和超微结构国家重点实验室, 上海 200050
    2.中国科学院 上海硅酸盐研究所, 结构陶瓷与复合材料工程研究中心, 上海 200050
    3.中国科学院大学, 北京 100049
  • 收稿日期:2020-05-15 修回日期:2020-06-09 出版日期:2021-05-20 网络出版日期:2021-04-19
  • 通讯作者: 胡建宝, 副研究员. E-mail: hujianbao@mail.sic.ac.cn
  • 作者简介:祝 泉(1986-), 女, 博士研究生. E-mail:zhuquan03@126.com

Strong SiC Porous Ceramic Obtained by Sintering of Reticulated Aligned SiC Nanowires

ZHU Quan1,2,3(), HU Jianbao1,2(), YANG Jinshan1,2, ZHOU Haijun1,2, DONG Shaoming1,2   

  1. 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-05-15 Revised:2020-06-09 Published:2021-05-20 Online:2021-04-19
  • Contact: HU Jianbao, associate professor. E-mail: hujianbao@mail.sic.ac.cn
  • About author:ZHU Quan(1986-), female, PhD candidate. E-mail:zhuquan03@126.com
  • Supported by:
    Key Research Program of Frontier Science, Chinese Academy of Sciences(QYZDY-SSW-JSC031);Key Program of the Chinese Academy of Sciences(ZDRW-CN-2017-1);Key Program of the Chinese Academy of Sciences(ZDRW-CN-2019-01)

摘要:

利用直接墨水打印方法制备了由定向SiC纳米线交错叠层组成的具备网络状孔隙结构的高强SiC多孔陶瓷。制备的碳化硅多孔陶瓷具有高的通孔结构和完全由定向SiC纳米线组装而成的结构特征。研究了烧结温度对定向SiC纳米线多孔陶瓷的微观结构、相组成演变及力学性能的影响。研究结果表明: 烧结温度低于1900 ℃时, SiC纳米线能保持高长径比; 1850 ℃烧结制备的定向SiCNWs多孔陶瓷的密度、气孔率和中位孔径分别为1.49 g/cm3、54.6%和~1 μm。得益于SiC纳米线的高强度以及取向排布, SiC纳米线多孔陶瓷的压缩强度高达(245.5±0.7) MPa。

关键词: 多孔陶瓷, SiC, 纳米线, 增材制造, 取向

Abstract:

High strength SiC porous ceramic with reticular pore structure is assembled by cross-lamination of layers comprised by aligned SiC nanowire (SiCNWs) struts printed through direct ink writing. SiCNWs networks exhibit a structure with highly interconnected porosity and an architecture formed by aligned SiCNWs struts. The effects of sintering temperature on the structures, phase evolutions and mechanical properties were studied. The high aspect ratio of SiCNWs was kept well at sintering temperature lower than 1900 ℃. The bulk density, porosity and median pore diameter of aligned SiCNWs porous ceramics sintered at 1850 ℃ were 1.49 g/cm3, 54.6% and ~1 μm, respectively. Due to the effect of orientation and high strength of SiC nanowire struts, compressive strength of (245.5±0.7) MPa is achieved.

Key words: porous ceramic, SiC, nanowire, additive manufacturing, orientation

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