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首页> 外文期刊>International journal of applied ceramic technology >Porous Si_3N_4/SiC Ceramics Prepared via Nitridation of Si Powder with SiC Addition
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Porous Si_3N_4/SiC Ceramics Prepared via Nitridation of Si Powder with SiC Addition

机译：硅粉氮化加硅制备多孔Si_3N_4 / SiC陶瓷

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摘要

Porous Si_3N_4/SiC ceramics with high porosity were prepared via nitridation of Si powder, using SiC as the second phase and Y_2O_3 as sintering additive. With increasing SiC addition, porous Si_3N_4/SiC ceramics showed high porosity, low flexural strength, and decreased grain size. However, the sample with 20wt% SiC addition showed highest flexural strength and lowest porosity. Porous Si_3N_4/SiC ceramics with a porosity of 36-45% and a flexural strength of 107-46MPa were obtained. The linear shrinkage of all porous Si_3N_4/SiC ceramics is below 0.42%. This study reveals that the nitridation route is a promising way to prepare porous Si_3N_4/SiC ceramics with favorable flexural strength, high porosity, and low linear shrinkage.
机译：以SiC为第二相，以Y_2O_3为烧结助剂，通过对Si粉进行氮化处理，制备了高孔隙率的多孔Si_3N_4 / SiC陶瓷。随着SiC添加量的增加，多孔Si_3N_4 / SiC陶瓷表现出高孔隙率，低弯曲强度和减小的晶粒尺寸。然而，添加了20wt％SiC的样品显示出最高的弯曲强度和最低的孔隙率。得到具有36-45％的孔隙率和107-46MPa的抗弯强度的多孔Si_3N_4 / SiC陶瓷。所有多孔Si_3N_4 / SiC陶瓷的线性收缩率均低于0.42％。这项研究表明，氮化途径是制备具有良好的抗弯强度，高孔隙率和低线性收缩率的多孔Si_3N_4 / SiC陶瓷的一种有前途的方法。

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    Hai-Long Hu; Dong-Xu Yao; Yong-Feng Xia; Kai-Hui Zuo; Yu-Ping Zeng;

  • 作者单位

    State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;

    State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China;

    State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China;

    State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China;

    State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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  • 入库时间 2022-08-17 13:39:11

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