钢纤维对莫来石质浇注料抗热震性的影响  

Effect of Steel Fiber on Thermal Shock Resistance of Mullite Castable

作　　者：冯海霞[1] 焦云杰 曹喜营[1] 柳军[1] 韩艺辉 FENG Haixia;JIAO Yunjie;CAO Xiying;LIU Jun;HAN Yihui(Sinosteel Luoyang Insitute of Refracotory Research Co.,Ltd.,State Key Laboratory of Advanced Refractory Materials,Luoyang 471039,Henan,China;China Building Materials Academy Co.,Ltd.,Beijing 100024,China)

机构地区：[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 [2]中国建筑材料科学研究总院有限公司,北京100024

出　　处：《硅酸盐学报》2023年第6期1565-1571,共7页Journal of The Chinese Ceramic Society

基　　金：国家重点研发计划(2021YFB3701400)。

摘　　要：采用楔入劈裂法和抗热应力损伤因子评价了不同钢纤维加入量时[0~2.5%(质量分数)]莫来石质浇注料的抗热震性能,并进一步通过1100℃急热–空气急冷试验法以及3种不同抗热震表征方法(抗折强度保持率、弹性模量保持率和超声波波速保持率)综合分析了浇注料抗热震性的变化趋势。结果表明:当钢纤维加入量在1.0%~2.0%,断裂韧性和抗裂纹扩展能力(R′′′′)随其加入量增加而增加,进而提高了浇注料的抗热震性能。当超过2.0%后,裂纹的快速生成和扩展会导致R′′′′和抗热震性的降低。The thermal shock resistance of mullite castable with different steel fiber contents(i.e.,0-2.5%(mass fraction))was evaluated by a wedge splitting method and a thermal stress factor.The thermal shock resistance of the castable was also analyzed by three different thermal shock resistance characterization methods(i.e.,the residual ratio of modulus of rupture,modulus of elasticity and ultrasonic wave velocity in air at 110o C.The results show that the fracture energy(R"")and fracture toughness increase with the increase of steel fiber content from 1.0%to 2.0%,thus improving the thermal shock resistance of castable.The rapid generation and propagation of cracks can lead to a decrease of R""and thermal shock resistance when the addition of steel fiberexceeds 2.0%.

关 键 词：抗热震性 钢纤维 楔入劈裂法 莫来石质浇注料 

分 类 号：TQ175[化学工程—硅酸盐工业]