作　　者： ; ; (等）;

机构地区： 中南大学材料科学与工程学院粉末冶金国家重点实验室

出　　处： 《炭素》 2002年第4期26-29,共4页

摘　　要： 将CVD法增密至1.34g/cm3和1.61g/cm3的两组试样热处理后进行力学性能测试;作为对比,将另外两组起始密度相近的样品经过树脂补充增密至1.80g/cm3以上,经热处理后也作了力学性能检测。检测结果发现,对纯CVD法增密的试样来说,密度高的样品的力学性能值也较高;树脂浸渍补充增密后,样品的力学性能明显优于纯CVD的低密度试样,浸前CVD起始密度高的样品的力学性能值也相对较高。对材料的力学性能初步分析认为,C/C复合材料的力学性能和失效方式不仅受材料密度的影响,而且也受基体炭种类、性能,如可石墨化,热处理温度等因素影响。相同条件下,石墨化度高的样品力学性能值偏低。 Two groups of samples with density of 1.34g/cm3 and 1.61g/cm3 by CVD method were tested of their mechanical properties after heat treatment.As a contrast ,the other samples with the approximate density were densified up to 1.80g/cm3 by resin impregnation,and their mechanicals properties also were tested after the same heat treatment.The experimental results showed that to samples with pure CVD densification,the higher its density,the higher its mechanical properties.Obviously,mechanical properties of samples densified by resin impregnation were superior to that with pure CVD method;while the samples with higher initial CVD density before resin impregnation had relatively higher mechanical properties.By preliminary analysis on the experimentl results,mechanical properties and failure mode of C/C composites were affected not only by the composite's density,but also its matrix carbon,type and properties such as graphitizability,heat treatment temperature and so on.Under the same condition,sample with higher graphitization degree had lower mechanical property.

关 键 词： 沉积密度 炭 炭复合材料 力学性能 影响 浸渍 石墨化工

领　　域： [化学工程] [一般工业技术]