C-SiC-B_4C复合材料烧结曲线的制定研究  

Study on Sintering Curves of C-SiC-B_4C Composites

作　　者：黄健[1] 陈石林[1] 李姗姗[1] 刘会忠[1] 叶崇[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《矿冶工程》2011年第3期115-118,共4页Mining and Metallurgical Engineering

摘　　要：利用TG-DSC热分析和傅里叶红外光谱分析研究了在不同炭化温度下C-SiC-B4C复合材料用煤沥青粘结剂的热缩聚焦化过程,考察了煤沥青焦化过程中内部结构基团变化。通过对中温煤沥青的TG-DSC分析和红外分析结果发现：中温煤沥青的结焦炭化过程主要在210~600℃之间完成,当利用煤沥青作粘结剂制备C-SiC-B4C复合材料时,这个温度区间的升温速率必须尽量减慢;一定范围内,随着烧结温度的提高,能够提高C-SiC-B4C复合材料的致密化程度。The coking process of coal-tar pitch binder for C-SiC-B4C composites at different carbonization temperatures is analyzed through TG-DSC and infrared spectrum analysis to investigate the change of structural groups of the binder in the coking process.Based on the TG-DSC and infrared spectrum analysis result,it is found that the main coking process of medium-temperature pitch is between 210～600 ℃ so that the heating rate in this temperature range must be slowed down when the medium-temperature pitch is used as binder to prepare C-SiC-B4C composites.The densification of C-SiC-B4C composites can be improved as the increase of the sintering temperature in a certain range.

关 键 词：炭-陶瓷复合材料 陶瓷相 SIC B4C 制备 烧结曲线 煤沥青 

分 类 号：TB332[一般工业技术—材料科学与工程]