Thermo-mechanical Properties of Al/Si Incorporated Low Carbon Al2O3-C Refractory Materials

摘要：

　　Low carbon Al2O3-C refractory materials have been prepared by Al/Si metal incorporated,in-situ formed nonoxides method using corundum,Al powder,Si powder and flake graphite as starting materials.High temperature strength,stress-strain relationship and thermal shock resistance of these composites have been investigated.The results show that these composites possess improved high temperature strength properties and good thermal shock resistance.When Al/Si ratio varies from 0/8to 8/0,hot modulus of rupture at 1400℃ increases significantly from 10.4MPa to 32.4MPa; maximum strain amount under 6.5MPa stress at 1400℃decreases from 215μm to 90μm; residual strength ratio after thermal shock at ΔT=1100℃ (air cooling,3 cycles) decreases from 79% to 65%.This may be attributed to in-situ formation of nonoxides because Al and Si react with C,CO and N2 to form Al4C3,AlN and SiC creating strengthening and toughening effects.

关键词： Thermo-mechanical properties Al/Si incorporation oxide-nonoxide refractory materials

作者: LIU Xinhong ZHONG Xiangchong

作者单位: High Temperature Ceramics Institute, Zhengzhou University, Zhengzhou, China

会议类型: 国际会议

会议名称: The 6th International Symposium on Refractories (第六届国际耐火材料会议)

会议地点: 郑州

会议语种:英文

页码: 520-523

在线出版日期: 2012-10-18（万方平台首次上网日期，不代表论文的发表时间）