通过Cr2AlC粉末改性提高自结合SiC耐火材料的抗蒸汽氧化和耐熔融碱腐蚀性能

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-09-30 DOI:10.1016/j.jeurceramsoc.2025.117864

Junyi Lv , Gongye Lv , Feng Liang , Haohui Gu , Yu Tian , Haijun Zhang , Shaowei Zhang

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引用次数: 0

摘要

自结合碳化硅（SiC）耐火材料由于其优异的强度和导热性，在高温工业中得到广泛应用。然而，其抗蒸汽氧化和抗熔融碱腐蚀性能有限，限制了其在工业窑炉（如垃圾焚烧炉）中的长期使用性能。在本研究中，将Cr2AlC粉末加入到自结合SiC耐火材料中来解决这些问题。对制备的耐火材料试样的显微组织、力学性能、抗蒸汽氧化性和耐硫酸钠腐蚀性能进行了系统的研究。当Cr2AlC含量为5 wt%时，冷断裂模量和冷抗压强度分别提高了11.4 %和21.7 %。样品的抗蒸汽氧化性显著提高，特征氧化时间（td）和特征氧化时间（tc）分别提高了11.1 %和174.5 %。在1100℃硫酸钠腐蚀4 h后，试样的残余重量和体积比分别增加了15.1 %和16.2 %。

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Improving steam oxidation and molten alkali corrosion resistance of self-bonded SiC refractories via Cr2AlC powder modification

Self-bonded silicon carbide (SiC) refractories are widely employed in high-temperature industries owing to their exceptional strength and thermal conductivity. However, the limited steam oxidation resistance and molten alkali corrosion resistance restricts their long-term service performance in industrial kiln applications, such as waste incinerators. In this study, Cr₂AlC powder was incorporated into self-bonded SiC refractories to address these issues. The microstructure, mechanical properties, steam oxidation resistance and sodium sulfate corrosion resistance of as-prepared refractory specimens were systematically investigated. The cold modulus of rupture and cold crushing strength increased by 11.4 % and 21.7 %, respectively, with 5 wt% Cr₂AlC. Steam oxidation resistance of the specimens improved significantly, with characteristic oxidation times (t_d and t_c) increasing by 11.1 % and 174.5 %, respectively. Moreover, after 4 h of sodium sulfate corrosion at 1100 °C, the residual weight and volume ratio of the specimen increased by 15.1 % and 16.2 %, respectively.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.