SiC/C纤维热力学生长机理研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (8): 2702-2712.

SiC/C纤维热力学生长机理研究

杨凡凡¹, 张瑜¹, 张涛¹, 王健¹, 赵伟¹, 李晋宇², 王坤¹, 刘玉浩², 郝桓民³, 范丽君³, 黄小萧², 温广武⁴

1.哈尔滨工业大学(威海)材料科学与工程学院,威海 264200;
2.哈尔滨工业大学材料科学与工程学院,哈尔滨 150001;
3.烟台鲁航炭材料科技有限公司,烟台 262006;
4.山东理工大学材料科学与工程学院,淄博 255049

收稿日期:2021-03-05 修回日期:2021-04-21 出版日期:2021-08-15 发布日期:2021-09-02
通讯作者: 张涛,副教授。E-mail:zhang.tao@hit.edu.cn
作者简介:杨凡凡(1997—),女,硕士研究生。主要从事功能材料方面的研究。E-mail:15162142859@163.com
基金资助:
国家自然科学基金(51302049)

Thermodynamic Growth Mechanism of SiC/C Fibers

YANG Fanfan¹, ZHANG Yu¹, ZHANG Tao¹, WANG Jian¹, ZHAO Wei¹, LI Jinyu², WANG Kun¹, LIU Yuhao², HAO Huanmin³, FAN Lijun³, HUANG Xiaoxiao², WEN Guangwu⁴

1. School of Materials Science and Engineering, Harbin Institute of Technology (Weihai), Weihai 264200, China;
2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
3. Yantai Luhang Carbon Material Technology Co., Ltd., Yantai 262006, China;
4. School of Materials Science and Engineering, Shandong University of Technology, Zibo 255049, China

Received:2021-03-05 Revised:2021-04-21 Online:2021-08-15 Published:2021-09-02

摘要/Abstract

摘要： 使用乙二醇作为稀释剂将硅溶胶稀释,得到不同浓度的硅溶胶溶液,用作涂覆商用碳纤维的原料。碳纤维表面改性后涂覆硅溶胶溶液,取出后在Ar气氛中于1 600 ℃保温30 min,硅溶胶涂层与碳纤维发生碳热还原反应形成SiC覆盖层。对制得的产物进行形貌和结构表征,并根据热力学数据对SiC包覆层的生长动力学和高温扩散机制进行研究。计算结果表明,反应过程为扩散控制。SiC/C纤维比碳纤维有更优异的耐高温氧化性能,为低成本制备新型陶瓷纤维提供可借鉴的思路和热力学依据。

关键词: 碳纤维, 涂层制备, 热力学, 耐高温氧化性能, 生长机理

Abstract: The silica sol was diluted with ethylene glycol as diluent to obtain different concentrations of silica sol solutions, which were used as raw materials for coating commercial carbon fibers. After surface modification, the carbon fibers were coated with silica sol solution and held at 1 600 ℃ for 30 min in the Ar atmosphere. The silica sol coating and carbon fibers underwent carbothermal reduction reaction to form SiC coating. The morphology and structure of the products were characterized, and the growth kinetics and high temperature diffusion mechanism of SiC coating were studied according to thermodynamic data. The calculation results show that the reaction process is diffusion controlled. The SiC/C fibers have better oxidation resistance at high temperature than the carbon fibers, which provides a useful idea and thermodynamic basis for the low-cost preparation of new ceramic fibers.

Key words: carbon fiber, coating preparation, thermodynamics, high temperature oxidation resistance, growth mechanism

中图分类号:

TB34

杨凡凡, 张瑜, 张涛, 王健, 赵伟, 李晋宇, 王坤, 刘玉浩, 郝桓民, 范丽君, 黄小萧, 温广武. SiC/C纤维热力学生长机理研究[J]. 硅酸盐通报, 2021, 40(8): 2702-2712.

YANG Fanfan, ZHANG Yu, ZHANG Tao, WANG Jian, ZHAO Wei, LI Jinyu, WANG Kun, LIU Yuhao, HAO Huanmin, FAN Lijun, HUANG Xiaoxiao, WEN Guangwu. Thermodynamic Growth Mechanism of SiC/C Fibers[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(8): 2702-2712.

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