耐火材料 ›› 2023, Vol. 57 ›› Issue (5): 423-426.DOI: 10.3969/j.issn.1001-1935.2023.05.010

• 生产应用 • 上一篇    下一篇

重结晶碳化硅在1 000 ℃饱和水蒸气中的氧化行为研究

曹会彦, 万龙刚, 王建波, 刘云, 郑翰, 张新华, 冯严宾, 吴吉光   

  1. 中钢集团洛阳耐火材料研究院有限公司 先进耐火材料国家重点实验室 河南洛阳 471039
  • 收稿日期:2023-03-22 出版日期:2023-10-15 发布日期:2023-10-26
  • 作者简介:曹会彦:女,1982年生,硕士,正高级工程师。E-mail:13838428457@126.com
  • 基金资助:
    2020年度郑洛新国家自主创新示范区创新引领型产业集群专项(201200211500);宁夏回族自治区重点研发计划(2022BFE01003)。

Oxidation of recrystallized SiC in 1 000 ℃ saturated steam

Cao Huiyan, Wan Longgang, Wang Jianbo, Liu Yun, Zheng Han, Zhang Xinhua, Feng Yanbin, Wu Jiguang   

  1. First author's address: State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China
  • Received:2023-03-22 Online:2023-10-15 Published:2023-10-26

摘要: 研究了选自3个不同厂家对应服役寿命分别为30、50、80次的3种重结晶碳化硅拱砖在1 000 ℃饱和水蒸气中保温500 h的氧化行为,检测其氧化后的质量变化率和体积变化率,分析氧化前后的物相组成和显微结构,并和现场服役寿命进行关联。结果表明:1)饱和水蒸气氧化条件下,重结晶程度最好的碳化硅氧化后质量变化率和体积变化率均最小,现场服役寿命也最长;2)在满足成型性能的前提下,尽可能多引入合适临界粒径的碳化硅,保证在足够广的范围内形成蒸发-凝聚传质,形成更多的重结晶网络,来获得更好的抗氧化性和更长的服役寿命。

关键词: 重结晶碳化硅, 水蒸气氧化, 物相组成, 显微结构

Abstract: Three kinds of recrystallized SiC from 3 different producers with the service lives of 30,50,and 80 heats were selected to test the oxidation in 1 000 ℃ saturated steam for 500 h.The mass change rate and volume change rate after oxidation were determined.The phase composition and microstructure before and after oxidation were analyzed and related with the service life.The results show that:(1)under the saturated steam oxidation,the sample with the best recrystallization degree has the smallest mass change rate and volume change rate after oxidation,so as to the longest service life;(2)under the premise of meeting the molding performance,SiC with appropriate critical particle size shall be introduced as much as possible,ensuring the formation of evaporation-condensation mass transfer in a large range,so as to get more recrystallized networks and achieve better oxidation resistance and longer service life.

Key words: recrystallized silicon carbide, steam oxidation, phase composition, microstructure

中图分类号: