以MAS为添加剂的碳化硅复合多孔材料的制备  

FABRICATION OF POROUS GLASS-CERAMIC BONDED SiC COMPOSITE MATERIAL WITH MAS ADDITIVE

作　　者：张丽[1] 武七德[2] 项海波[1] 许宏民[1] 王克刚[1] 

机构地区：[1]淄博出入境检验检疫局,淄博255031 [2]武汉理工大学硅酸盐教育部重点实验室,武汉430070

出　　处：《陶瓷学报》2010年第1期65-69,共5页Journal of Ceramics

摘　　要：在碳化硅(SiC)中加入MAS(镁铝硅)玻璃相,经过750℃×2h/1200℃×2h的热处理,制得了高强度的α-堇青石微晶玻璃结合碳化硅复合多孔材料。利用热膨胀仪测得了添加剂微晶玻璃的热膨胀系数,通过DTA研究了微晶玻璃的核化温度和晶化温度;分别利用XRD和SEM分析了材料的物相和显微结构;利用多功能试验机,对材料的强度进行了测试。通过建立的模型,近似计算了基体碳化硅和结合相的残余应力值。经研究制得了热膨胀系数为4.04×10-6/K的与基体碳化硅相匹配的结合相堇青石微晶玻璃、抗折强度为131Mpa复合多孔材料。α-cordierite glass-ceramic bonded silicon carbide （SIC） porous compound material with high intensity was prepared by adding MAS （MgO-Al2O3-SiO2） glass to SiC through the heat treatment of 750℃×2h/200℃×2h. The thermal-expansion coefficient of α-cordierite glass-ceramic was measured. And the coring temperature and the crystallization temperature of the MAS glass were analyzed using DTA. The material＇s phase composition and microstructure were characterized by XRD and SEM respectively, while the intensity of the material was also measured. Through the established model, the residual stress of α-cordierite glass--ceramic boundary was calculated. The results demonstrated that the thermal-expansion coefficient of MAS （MgO-Al2O3-SiO2） glass was 4.04×10^-6/K, and the fracture resistance intensity of silicon carbide （SIC） porous compound material was 131Mpa.

关 键 词：碳化硅 α-堇青石微晶玻璃 高强度多孔材料 残余应力 

分 类 号：TQ174.75[化学工程—陶瓷工业]