摘要
在不同热震温差下，研究了高铝纤维对铝硅质耐火材料的强度和裂纹形成及扩展的影响。利用海氏理论和（Ｇｒｉｆｆｉｔｈ断裂力学理论，推导出临界热震温差与裂纹扩展之间的解析式．研究认为：引入数量和长径比适宜的纤维，可在基体内形成大量微裂纹。
Effect of alumina fiber on strength and crack forming and extending of Al2O3-SiO2 refractories after thermal shocked at different thermal shock temperature difference (△T) was researched. The relationship equation between critical thermal shock temperature difference (△Tc) and crack extending was deduced according to the Haise and Griffith fracture theory. The results show that adding proper amount fiber with suitable length/diameter ratio can form a lot of microcracks in the materials and, microcrack toughening is one of the main mechanisms that the thermal shock resistance of fiber -reinforced refractories is improved.
出处
《耐火材料》
CAS
北大核心
2001年第6期323-325,328,共4页
Refractories
关键词
纤维增强
抗热震机理
高铝纤维
微裂纹
铝硅质耐火材料
Alumina fiber, Microcrack,Al2O3 -SiO2 refractories, Thermal shock resistant mechanism
