烧结工艺对无粘结剂C/C复合材料性能的影响  

EFFECT OF SINTERING ON THE PROPERTIES OF BINDERLESS C/C COMPOSITES

作　　者：刘其城[1] 徐协文[2] 周声励[3] 

机构地区：[1]长沙电力学院,长沙410077 [2]中南大学,长沙410083 [3]湖南大学,长沙410084

出　　处：《炭素技术》2002年第2期15-18,共4页Carbon Techniques

基　　金：湖南省自然科学基金 (98JJY2 0 5 8);湖南省教委科研基金项目 (0 110 5 0 0 2 0 12 7)

摘　　要：烧结是制备无粘结剂C/C复合材料工艺过程中最为关键的一个环节 ,烧结方式和烧结制度是否合理直接影响着制品的最终性能。对此 ,进行了常压和加压烧结两种工艺制度的比较研究 ,分析了影响制品性能的主要原因 :水分及其他吸附杂质的排出 ;挥发分逸出 ;氧化烧损。试验表明 :在 30 0～ 70 0℃之间保持 0 .7～ 1.7℃ /min的慢升温速率加压烧结 ,可以获得性能优良的无粘结剂C/C复合材料。Sintering process plays an important role in preparation of binderless C/C composites, and the properties of final C/C composite products is closely related to the sintering method and the sintering scheme adopted in the process. In this paper the sintering processes with and without pressure were compared, and it was found that the main factors affecting the properties of the C/C composite include the elimination of the moisture and impurities in raw materials as well as the volatile matter released in the sintering process and the control of weight loss during oxidation stage. The experimental results indicate that binderless C/C composites with good properties can be obtained at 300～700 ℃ with the heating rate being at about 0.7～1.7 ℃/min.

关 键 词：无粘结剂 C/C复合材料 烧结 

分 类 号：TQ342.742[化学工程—化纤工业] TB332[一般工业技术—材料科学与工程]