摘要
将高温煤沥青和浸渍剂沥青在不同压力下炭化,在2500℃下对所得沥青炭进行石墨化处理;测试了所得沥青炭的体积密度、开孔率;利用扫描电子显微镜(SEM)观察了所得沥青炭的显微结构;利用XRD检测了所得沥青炭石墨化处理后的石墨化度;测试了所得沥青炭的压缩强度。结果表明:随着炭化压力的增大,沥青炭的体积密度增大而开孔率减小,压缩强度也随之增大;随着炭化压力的增大沥青炭显微结构呈由流线型向镶嵌型和域型转变的趋势;流线型结构沥青炭石墨化度较高,但也导致沥青炭的压缩强度降低。
Pitch derived carbons were prepared by carbonization and graphitization of high temperature pitch and impregnating pitch at different pressures and temperature of 2500℃. Bulk density, porosity of pitch derived carbon were determined. The morphology of pitch derived carbon has been observed by scanning electron microscopy （SEM）. X-ray diffraction method was used to analysize the graphitization degree of pitch derived carbons after graphitization at different pressures. The compression strength of pitch derived carbons was tested. The results indicate that the bulk density of pitch, derived carbon increases, at the same time the compression strength increases and the porosity decreases with an increase of the pressure. The microstructure of pitch derived carbon transformed from flow domain type to grained mosaics type and field type. The graphitization degree with flow domain type texture was higher, but the compression strength of pitch derived carbons with such texture was lower.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2007年第1期91-94,共4页
Journal of Materials Science and Engineering
基金
十一五国家重点基础研究发展规划资助项目(2006CB600902)
关键词
沥青炭
炭/炭复合材料
结构
压缩强度
pitch derived carbon
C/C composites
structure
compression strength
