Y2Si2O7增强SiC质耐火材料抗高温水蒸气腐蚀性能研究

doi:10.3969/j.issn.1001-1935.2025.01.002

耐火材料 ›› 2025, Vol. 59 ›› Issue (1): 8-12.DOI: 10.3969/j.issn.1001-1935.2025.01.002

Y₂Si₂O₇增强SiC质耐火材料抗高温水蒸气腐蚀性能研究

薛海涛¹⁾, 刘星宇²⁾, 陈定^2,3), 顾华志²⁾, 李少飞³⁾黄奥²⁾, 付绿平²⁾, 伍书军¹⁾

1)中冶武汉冶金建筑研究院有限公司湖北武汉 430081
2)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
3)新疆兵团化工绿色过程重点实验室新疆石河子 832000

收稿日期:2024-06-25 出版日期:2025-02-15 发布日期:2025-02-27
通讯作者: 陈定,男,1993年生,博士,副教授。E-mail:chending_his@163.com
作者简介:薛海涛:男,1983年生,硕士,高级工程师。E-mail:260413880@qq.com
基金资助:
* 国家自然科学基金面上项目(52172023);新疆兵团化工绿色过程重点实验室开放基金(KF202401)。

High-temperature water vapor corrosion resistance of Y₂Si₂O₇ reinforced SiC based refractories

Xue Haitao, Liu Xingyu, Chen Ding, Gu Huazhi, Li Shaofei, Huang Ao, Fu Lyuping, Wu Shujun

First author’s address:Wuhan Metallurgical Construction Research Institute Co.,Ltd.of MCC,Wuhan 430081,Hubei,China

Received:2024-06-25 Online:2025-02-15 Published:2025-02-27

摘要/Abstract

摘要： 为解决高温水蒸气对垃圾焚烧炉用SiC质耐火材料产生的严重腐蚀,以SiC颗粒和细粉为主原料,硅溶胶为结合剂,Y₂O₃粉为添加剂,在150 MPa的压力下压制成140 mm×25 mm×25 mm的长条试样,经 1 400 ℃保温3 h烧成制备Y₂Si₂O₇增强SiC质耐火材料,再经1 000 ℃保温100 h水蒸气腐蚀。研究Y₂O₃粉的添加量(添加质量分数分别为0、1.5%、3.0%、4.5%)对烧后试样和水蒸气腐蚀后试样的性能、物相组成和显微结构的影响。结果表明:添加Y₂O₃会造成烧后SiC质耐火材料的显气孔率上升,常温抗折强度下降;但是随着Y₂O₃添加量的增加,经1 000 ℃保温100 h水蒸气腐蚀后试样的体积密度和常温抗折强度增加,水冷热震5次后的常温抗折强度增加,因为1 400 ℃高温烧成过程中Y₂O₃和SiO₂原位反应生成Y₂Si₂O₇增强相,其与SiC基体结合紧密,且Y₂Si₂O₇在高温水蒸气条件下稳定性好,与SiC基体热膨胀系数接近,能够提高SiC质耐火材料的抗高温水蒸气腐蚀性能。

关键词: SiC质耐火材料, Y₂Si₂O₇, 水蒸气腐蚀, 抗热震性

Abstract: To solve the serious high-temperature water vapor corrosion of SiC based refractories used in waste incinerators,SiC particles and powders were adopted as main raw materials,silica sol as the binder,and Y₂O₃ as the additive to prepare strip samples of 140 mm×25 mm×25 mm under the pressure of 150 MPa.The strip samples were fired at 1 400 ℃ for 3 h to fabricate Y₂Si₂O₇ reinforced SiC based refractories,and then the SiC based refractories were corroded under a water vapor atmosphere at 1 000 ℃ for 100 h.The effect of the Y₂O₃ addition (0,1.5%,3.0%,4.5%,by mass) on properties,phase composition,microstructure of the fired and water vapor corroded samples were investigated.The results show that:the addition of Y₂O₃ increases the apparent porosity of SiC based refractories and decreases the cold modulus of rupture;however,with the increase of the Y₂O₃ addition,the bulk density and cold modulus of rupture of the samples after water vapor corrosion at 1 000 ℃ for 100 h increase,and the cold modulus of rupture increases after 5 water-cooled thermal shock cycles.This is because of the enhanced phase Y₂Si₂O₇ formed by the in-situ reaction between Y₂O₃ and SiO₂ during firing at 1 400 ℃.It tightly bonds with SiC matrix,performs good stability in high-temperature water vapor,and has an approximate thermal expansion coefficient to SiC,which can improve the high-temperature water vapor corrosion resistance of the SiC based refractories.

Key words: SiC based refractories, Y₂Si₂O₇, water vapor corrosion, thermal shock resistance

中图分类号:

TQ175

薛海涛, 刘星宇, 陈定, 顾华志, 李少飞黄奥, 付绿平, 伍书军. Y₂Si₂O₇增强SiC质耐火材料抗高温水蒸气腐蚀性能研究[J]. 耐火材料, 2025, 59(1): 8-12.

Xue Haitao, Liu Xingyu, Chen Ding, Gu Huazhi, Li Shaofei, Huang Ao, Fu Lyuping, Wu Shujun. High-temperature water vapor corrosion resistance of Y₂Si₂O₇ reinforced SiC based refractories[J]. Refractories, 2025, 59(1): 8-12.

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Y₂Si₂O₇增强SiC质耐火材料抗高温水蒸气腐蚀性能研究

High-temperature water vapor corrosion resistance of Y₂Si₂O₇ reinforced SiC based refractories

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