Cr_(2)AlC对自结合SiC耐火材料服役性能的影响  

Effect of Cr_(2)AlC on service performance of self-bonded SiC refractories

作　　者：吕功业 梁峰[1] 谷昊辉 田宇 何冈骏 张海军[1] Lyu Gongye;Liang Feng;Gu Haohui;Tian Yu;He Gangjun;Zhang Haijun(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[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

出　　处：《耐火材料》2024年第6期480-485,共6页Refractories

基　　金：国家自然科学基金面上资助项目(52272021,52072274,52232002,U23A20559)。

摘　　要：为优化自结合SiC耐火材料的性能,以碳化硅(3~1、≤1和≤0.074 mm)、硅粉(≤45μm)和石墨(≤10μm)为原料,Cr_(2)AlC粉体(≤74μm)为添加剂,在150 MPa下压制为25 mm×25 mm×40 mm的坯体,经110℃干燥、1 300℃热处理后制备自结合SiC耐火材料。研究了Cr_(2)AlC加入量(加入质量分数分别为0、1%、3%和5%)对其常温物理性能、抗硫酸钠侵蚀性能以及抗水蒸气氧化性能的影响。结果表明:随着Cr_(2)AlC加入量增加,经110℃干燥后试样的常温物理性能差异不大,经1 300℃热处理后试样的常温物理性能呈现出逐渐升高的趋势,抗硫酸钠侵蚀性能先升高后降低。当Cr_(2)AlC粉体加入量为3%(w)时,试样在水蒸气中的质量变化率也较低,综合性能较优。To optimize the properties of self-bonded SiC refractories,the specimens were fabricated using silicon carbide(3-1,≤1,and ≤0.074 mm),silicon powder(≤45 μm) and graphite(≤10 μm) as raw materials,and Cr_(2)AlC powder(≤74 μm) as an additive,pressing under 150 MPa into 25 mm×25 mm×40 mm shapes,drying at 110 ℃ and heat treating at 1 300 ℃.The effects of the Cr_(2)AlC addition(0,1%,3%,and 5%,by mass) on the cold physical properties,sodium sulfate corrosion resistance,and steam oxidation resistance of the materials were investigated.The results reveal that with the increasing Cr_(2)AlC addition,the cold physical properties of the specimens after drying at 110 ℃ differ slightly;however,the cold physical properties of the specimens fired at 1 300 ℃ show a gradually increasing trend;while the sodium sulfate corrosion resistance initially increases and then decreases.When the Cr_(2)AlC powder addition is 3%,the specimen exhibits a low mass change rate in the steam,demonstrating good overall performance.

关 键 词：Cr_(2)AlC粉体 自结合SiC耐火材料 常温物理性能 抗硫酸钠侵蚀性能 

分 类 号：TQ175[化学工程—硅酸盐工业]