TiO2添加量对SiC多孔陶瓷物相组成及性能的影响

doi:10.3969/j.issn.1001-1935.2024.02.001

耐火材料 ›› 2024, Vol. 58 ›› Issue (2): 93-98.DOI: 10.3969/j.issn.1001-1935.2024.02.001

• 研究开发 • 下一篇

TiO₂添加量对SiC多孔陶瓷物相组成及性能的影响

邓承继¹⁾, 贺锋²⁾, 梁一鸣²⁾, 李季²⁾, 高超²⁾, 慕孟²⁾

1)武汉科技大学省部共建耐火材料与冶金国家重点实验室湖北武汉 430081
2)军事科学院国防工程研究院北京 100039

收稿日期:2023-10-10 出版日期:2024-04-15 发布日期:2024-04-24
通讯作者: 贺锋,男,1973年生,正高级工程师。 E-mail:13601271773@163.com; 梁一鸣,男,1990年生,工程师。 E-mail:lym19900825@163.com
作者简介:邓承继:男,1969年生,教授。 E-mail:cjdeng@wust.edu.cn
基金资助:
军内装备综合研究项目(JK20202A050023)资助。

Influence of TiO₂ addition on phase composition and properties of porous SiC ceramics

Deng Chengji, He Feng, Liang Yiming, Li Ji, Gao Chao, Mu Meng

First author's address: The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China

Received:2023-10-10 Online:2024-04-15 Published:2024-04-24

摘要/Abstract

摘要： 为制备同时具有高气孔率和高强度的硅结合SiC多孔陶瓷,以α-SiC粉、单质Si粉及TiO₂粉为主要原料,在氩气气氛下经1 400 ℃保温3 h制备SiC多孔陶瓷,探究TiO₂添加量(加入质量分数分别为0、2%、4%、8%)对材料物相组成、显微形貌、孔径分布及主要物理性能的影响。结果表明:随TiO₂添加量的增加,单质Si的衍射峰逐渐消失,材料中检测到Ti₃O₅及TiSi₂物相,伴随着新相的生成,SiC颗粒间结合更加紧密,其显气孔率及平均孔径减小,力学性能显著提升。当TiO₂添加量为8%(w)时,材料具有优异的综合性能,其显气孔率、常温抗折强度及平均孔径分别为33.6%、29.6 MPa和0.27 μm。

关键词: 多孔SiC陶瓷, TiO₂, 孔径分布, 物相组成, 力学性能

Abstract: To achieve high porosity and strength,porous SiC ceramics were fabricated by utilizing α-SiC powder,Si powder and TiO₂ powder as starting materials and firing at 1 400 ℃ for 3 h in an argon atmosphere.The influence of the TiO₂ addition (0,2%,4% and 8%,by mass) on the phase composition,micromorphology,pore size distribution and main physical properties of the materials was studied.The results show that as the TiO₂ addition increases,the diffraction peak of Si gradually diminishes,while Ti₃O₅ and TiSi₂ are detected in the materials.With the formation of these new phases,SiC particles are bonded more tightly,resulting in reduced apparent porosity and average pore size along with significantly improved mechanical properties.When the TiO₂ addition is 8%,exceptional comprehensive properties of the material are achieved in terms of the apparent porosity of 33.6%,cold modulus of rupture of 29.6 MPa and average pore size of 0.27 μm.

Key words: porous silicon carbide ceramics, titanium dioxide, pore size distribution, phase composition, mechanical properties

中图分类号:

TQ175.71

邓承继, 贺锋, 梁一鸣, 李季, 高超, 慕孟. TiO₂添加量对SiC多孔陶瓷物相组成及性能的影响[J]. 耐火材料, 2024, 58(2): 93-98.

Deng Chengji, He Feng, Liang Yiming, Li Ji, Gao Chao, Mu Meng. Influence of TiO₂ addition on phase composition and properties of porous SiC ceramics[J]. Refractories, 2024, 58(2): 93-98.

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TiO₂添加量对SiC多孔陶瓷物相组成及性能的影响

Influence of TiO₂ addition on phase composition and properties of porous SiC ceramics

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