热处理温度对ZrO_(2)纤维复合ZrO_(2)-C材料性能的影响  

Effect of Heat Treatment Temperature on Properties of ZrO_(2) Fiber Composite ZrO_(2)-C Material

作　　者：陈海军 徐恩霞 李淼 高金星 葛铁柱 CHEN Haijun;XU Enxia;LI Miao;GAO Jinxing;GE Tiezhu(Henan Key Laboratory of High Temperature Functional Ceramics,School of Material Science and Engineering,Zhengzhou University,Zhengzhou 450052,China)

机构地区：[1]郑州大学材料科学与工程学院,河南省高温功能材料重点实验室,郑州450052

出　　处：《硅酸盐通报》2021年第10期3219-3225,3240,共8页Bulletin of the Chinese Ceramic Society

基　　金：先进耐火材料国家重点实验室开放基金(SKLAR202108)。

摘　　要：浸入式水口是钢铁连铸工序中关键的功能耐火材料,其中以渣线部位的工作环境最为恶劣。目前,最适合的渣线材料是ZrO_(2)-C材料。为了提高浸入式水口的性能,本文以氧化锆与鳞片石墨为主要原料,添加增强材料氧化锆纤维及金属硅粉等,以酚醛树脂为结合剂制备ZrO_(2)-C复合材料。比较了1000℃、1200℃和1500℃三种热处理温度对ZrO_(2)-C材料的性能及显微结构的影响,结果表明,在热处理温度高于1200℃时,ZrO_(2)-C材料中的硅粉与石墨发生反应生成碳化硅,大量晶须状碳化硅与ZrO_(2)纤维交错在一起形成网络结构,提高了材料的力学性能和抗热震性。Submersed entry nozzle is critical functional refractories in continuous casting and the slag line parts has the worst working environment. At present, the most suitable slag line material is ZrO_(2)-C material. In order to improve the performance of submersed entry nozzle, ZrO_(2)-C material was prepared by using zirconia and flake graphite as the main raw materials, zirconia fiber and metal silica powder as reinforcement materials, and phenolic resin as binder. The effects of three heat treatment temperatures, 1 000 ℃, 1 200 ℃ and 1 500 ℃, were compared on the properties and microstructure of ZrO_(2)-C material. The results show that when the heat treatment temperature is higher than 1 200 ℃, the silicon powder reacts with carbon to form silicon carbide, and a large number of whisker silicon carbide interleaves with ZrO_(2) fiber to form a network structure, which improves the mechanical properties and thermal shock resistance of the material.

关 键 词：耐火材料 ZrO_(2)-C材料 热处理温度 抗热震性能 碳化硅晶须 浸入式水口 

分 类 号：TQ175.7[化学工程—硅酸盐工业]