Investigation of fracture behavior of cement-bonded corundum castables using wedge splitting test and digital image correlation method
Investigation of fracture behavior of cement-bonded corundum castables using wedge splitting test and digital image correlation method
复制标题
DOI：
10.1016/j.jeurceramsoc.2019.11.081
复制
发表时间：
2020-04
影响因子：
5.7
通讯作者：
L. Pan;Zhu He;Yawei Li;Tianbin Zhu;Qinghu Wang;Baokuan Li;Yajie Dai;Xiaofeng Xu
中科院分区：
文献类型：
--
作者：
L. Pan;Zhu He;Yawei Li;Tianbin Zhu;Qinghu Wang;Baokuan Li;Yajie Dai;Xiaofeng Xu
为了研究水泥结合刚玉浇注料的断裂行为，采用楔形法和数字图像相关技术对不同水泥含量和不同处理温度的刚玉浇注料的断裂行为进行了对比研究。结果表明，显微组织提高了材料的力学性能，相应地影响了材料的断裂能、最大载荷和断裂方式。当水泥含量为10wt%时，由于适量的Ca6，浇注料在1600°C时表现出最高的断裂能和最大载荷。在110℃和1100℃时，裂纹在基体内和界面上的扩展占主导地位，而在1600℃时，骨料内的裂纹扩展显著增加，导致材料的脆性。然而，增加水泥掺量可以降低其脆性，这是由于x方向的最大应变、主裂纹的最大长度和高的裂纹在基质中的扩展比率造成的。
To investigate the fracture behavior of cement-bonded corundum castables, various cement contents and pre-treating temperatures have been comparatively studied using the wedge splitting method and the digital image correlation technique. The results show that the microstructure enhances the mechanical properties, so the fracture energy and the maximum load as well as the fracture modes are affected correspondingly. The castables demonstrate the highest fracture energy and maximum load at 1600 °C with cement content of 10 wt% due to an appropriate amount of CA6. At the temperatures of 110 and 1100 °C, the crack propagation within the matrix and along the interface are dominated whereas within the aggregates significantly increased at 1600 °C, leading to the brittleness of materials. However, increasing the cement content can reduce their brittleness, caused by the maximum strain in thex-direction, largest length of the main crack, and high ratio of crack propagation in the matrix.