刘占军
,
郭全贵
,
刘朗
,
史景利
,
翟更太
新型炭材料
doi:10.1016/S1872-5805(09)60035-4
分别利用炭黑、石油焦、针状焦和天然石墨粉为填料,煤沥青为黏结剂,经模压成型(150MPa,10min)、炭化(1300℃,1h)和石墨化(2300℃)制备炭/石墨材料.考察了填料类型对最终炭/石墨材料物理性能和微观结构的影响.研究结果表明:利用炭黑为填料所制材料具有较高的机械强度,但其导热和导电性能相对较差;经石墨化后(2300℃),其抗弯和抗压强度分别达到88.0和173.2MPa.而以天然石墨粉为填料所制材料具有较好的导热和导电性能,在室温下其导热率达到278W/m · K;另外,其抗弯和抗压强度分别达到51.1和90.2MPa.微观结构分析表明,以天然石墨粉为填料所制得的材料具有最大的微晶尺寸和高度的取向性.
关键词:
炭/石墨
,
机械强度
,
开孔率
,
微观结构
Ling LIU
,
Boming ZHANG
,
Zhanjun WU
,
Dianfu WANG
材料科学技术（英文）
This work aims at designing a set of curing pressure routes to produce laminates with various void contents. The effects of various consolidation pressures resulting in different void contents on mechanical strength of carbon/epoxy laminates have been examined. Characterization of the voids, in terms of void volume fraction, void distribution, size, and shape, was performed by standard test, ultrasonic inspection and metallographic analysis. The interlaminar shear strength was measured by the short-beam method. An empirical model was used to predict the strength vs porosity. The predicted strengths conform well with the experimental data and voids were found to be uniformly distributed throughout the laminate.
关键词:
Carbon/epoxy laminates
,
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