• Journal of Inorganic Materials
  • Vol. 36, Issue 10, 1103 (2021)
ZHANG Junmin1、2、3, CHEN Xiaowu1、2、*, LIAO Chunjin1、2, GUO Feiyu1、2、3, YANG Jinshan1、2, ZHANG Xiangyu1、2, and DONG Shaoming1、2、*
Author Affiliations
  • 11. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • 22. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • 33. School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, China
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    Abstract

    Reactive melt infiltration (RMI) is one of the most effective methods to prepare highly dense ceramic matrix composites. The melt infiltration and the formation of composites are mainly determined by the pore structure of preforms. Here, SiC fiber reinforced SiC matrix composites (SiCf/SiC) were prepared by infiltrating Si melt into carbon-contained preforms with various pore structures. Effects of pore structure on the melt infiltration and received SiCf/SiC composites were investigated. The results indicated that the preforms with more homogeneous pore size could lead to more sufficient melt infiltration, and also resulted in fewer residual pores and better mechanical properties in the composites. This study is expected to provide important guidance for the pore structure regulation in the fabrication of RMI-composites.

    Due to obvious advantages of fast densification and low cost, reactive melt infiltration (RMI) has become one of the most attractive techniques in the fabrication of ceramic and ceramic-matrix composites[1,2]. Particularly, increasing research focuse on the fabrication of SiC monolithic and SiC-based composites by RMI method, where Si or Si-based alloy melt is infiltrated into porous carbon preforms and SiC phase is in-situ formed through the reaction between them[3,4]. During RMI process, a porous preform with specific pore structure is constructed, and then a highly reactive melt is infiltrated into the preform, forming the ceramic matrix through the in-situ reaction[5,6,7]. Both the microstructure and the properties of the received materials can be tailored by adjusting the pore structures of the preforms. This gives high flexibility for RMI method to optimize the obtained materials.

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    Junmin ZHANG, Xiaowu CHEN, Chunjin LIAO, Feiyu GUO, Jinshan YANG, Xiangyu ZHANG, Shaoming DONG. Optimizing Microstructure and Properties of SiCf/SiC Composites Prepared by Reactive Melt Infiltration [J]. Journal of Inorganic Materials, 2021, 36(10): 1103
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    Category: RESEARCH LETTER
    Received: Feb. 9, 2021
    Accepted: --
    Published Online: Nov. 26, 2021
    The Author Email: CHEN Xiaowu (xwchen@mail.sic.ac.cn), DONG Shaoming (smdong@mail.sic.ac.cn)