论文部分内容阅读
用液化石油气作碳源、针刺炭毡作增强体,在自行设计的多元耦合物理场CVI炉中制备炭/炭(C/C)复合材料,在毡体内部设置石墨纸作发热体,并研究了一次性沉积15h后,毡体密度对增密速度和材料结构的影响.采用偏光显微镜研究了沉积炭的显微结构,用XRD均峰位法研究了材料的石墨化度,并用排水法测量材料的表观密度.研究表明,CVI工艺增密速度随毡体密度的增加呈下降趋势,而较高的毡体密度有利于获得较高石墨化度的高织构的粗糙层结构(RL)热解炭.图4,参15.
The liquefied petroleum gas was used as carbon source and acupuncture carbon felt was used as reinforcements. C / C composites were prepared in a self-designed multi-coupled physics CVI furnace. Graphite paper was placed inside the felt as heating element, The effects of the density of the felt on the densification rate and the structure of the material were investigated 15 h after the one-time deposition.The microstructure of the deposited carbon was studied by polarized light microscopy and the graphitization degree of the material was investigated by XRD average peak position method, Method was used to measure the apparent density of the material.The results showed that the densification rate of CVI decreased with the increase of the density of the felt while the higher density of the felt helped to obtain a highly textured coarse structure with a higher degree of graphitization RL) pyrolytic carbon.