Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (5): 547-551.DOI: 10.15541/jim20200265

Special Issue: 【虚拟专辑】增材制造及3D打印(2021-2022)

• RESEARCH LETTER • Previous Articles     Next Articles

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)

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

CLC Number: