将武钢中温沥青和太钢高温沥青在不同压力下炭化,进一步对所得沥青焦进行了高温热处理;利用扫描电子显微镜(SEM)和光学显微镜观察所得沥青焦形貌.结果表明:低压炭化时,沥青焦体积密度小,疏松、多大孔,主要为流线区域型各向异性结构;高压炭化时,沥青焦体积密度明显变大,孔变小且均匀分布,主要为小区域型和细镶嵌型各向异性显微结构.考察了不同炭化压力对浸渍增密航空刹车用C/C复合材料的增密效率的影响,结果显示,对整个沥青而言的宏观残炭率明显高于只针对样品而言的实际残炭率,因此有必要进行高压浸渍/炭化实现快速增密.利用XRD和显微硬度测试仪检测了不同炭化压力所得沥青焦热处理后的石墨化度和显微硬度,发现高压下形成的沥青炭更难于石墨化,但石墨化度与显微硬度和热处理后的粗糙层(RL)CVD炭有较好的可比性.
参考文献
[1] | 弗·耶·普里瓦洛夫;米 阿·斯捷潘年科普;张莲凤;李瑞芝.煤沥青[M].沈阳:吉林省金属学会,1983 |
[2] | Matzinos PD.;Walker A.;Patrick JW. .COAL-TAR PITCH AS A MATRIX PRECURSOR FOR 2-D C/C COMPOSITES[J].Carbon: An International Journal Sponsored by the American Carbon Society,1996(5):639-644. |
[3] | Savage G.Carbon-carbon Composites[M].Cambridge:Chapman & Hall,1993:176. |
[4] | 刘文种,董林清.化学气相沉积碳--碳复合材料工艺参数、结构性能的研究[J].电碳技术,1981(01):17-29. |
[5] | Hyeok Je Jeong;Hee Dong Park;Jac Do Lee et al.Densification of carbon/carbon composites by pulse chemical vapour infiltration[J].CARBON,1996,34(03):417-421. |
[6] | Foulds William T.Carbon/carbon disc brakes made in record time[J].Advanced Composites Bulletin,1994(09):7-10. |
[7] | 刘文川.国外纤维增强复合材料[M].上海:上海科学技术情报研究所,1979:19-34. |
[8] | Pierson H O;Lieberman M L .The chemical vapor deposition of carbon on carbon fibers[J].Carbon,1975,13(01):159-166. |
[9] | Forrest M A;Marsh H .The effect of pressure on the carbonization of pitch and pitch/carbon fibre composites[J].Journal of Materials Science,1988,18(07):978-990. |
[10] | 宋永忠,史景利,朗冬生,宋进仁,刘朗.炭/炭复合材料浸渍-炭化工艺的研究[J].炭素技术,2000(03):18-21. |
[11] | 孙乐民,李贺军,张守阳,姜开宇,候向辉.沥青基C/C复合材料及其研究现状[J].机械科学与技术,2000(01):113-117. |
[12] | Matzinos PD.;Walker A.;Patrick JW. .The efficiency and mechanism of densification of 2-D C/C composites by coal-tar pitch impregnation[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(8):1123-1128. |
[13] | Granda M.;Walker A.;Casal E.;Bermejo J.;Menendez R.;Patrick JW. .Densification of unidirectional C/C composites by melted pitch impregnation[J].Carbon: An International Journal Sponsored by the American Carbon Society,1998(7/8):943-952. |
[14] | GeraldRellick .Densification efficiency of carbon-carbon composites[J].Carbon,1990,28(04):589-594. |
[15] | 嵇阿琳,马伯信,霍肖旭,刘红林,曾晓梅,李义和.CLVD法制备2D C/C复合材料[J].新型炭材料,2000(01):35-39. |
[16] | 邹志强,汤中华,熊杰.用热梯度式CVD增密技术制造C/C复合刹车盘[J].新型炭材料,2000(02):22-27. |
[17] | 宋永忠,史景利,翟更太,宋进仁,刘朗.沥青浸渍过程的数学模拟[J].新型炭材料,2000(04):21-26. |
[18] | 智林杰,宋进仁,刘朗.高残炭率浸渍剂沥青的组成设计[J].新型炭材料,2001(01):5-9. |
[19] | 中华人民共和国航空航天工业部.QJ2507-93碳素材料微观结构参数测定方法[M].北京:中国标准出版社,1993 |
[20] | Swietlik U;Jasienko S;Wolski A et al.Carbonization and graphitization processes of pitch from coal liquid and its fractions[J].Carbon,1993,31(03):461-466. |
[21] | 周声劢.煤沥青的加压炭化及炭-石墨制品的加压焙烧[J].炭素技术,1988(05):15-19. |
[22] | 巩前明,黄启忠,张福勤,黄伯云,CHEN Teng-fei.炭/炭复合材料浸渍用沥青的性能分析[J].中南工业大学学报(自然科学版),2000(06):536-539. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%