利用热膨胀仪测定了炭/炭复合材料从室温到1300℃的热膨胀系数,研究了热处理温度、炭纤维取向和环境温度对炭/炭复合材料热膨胀性能的影响.结果表明:由于热解炭是以层状的方式围绕炭纤维生长,所以其热膨胀各向异性,垂直于纤维方向的热膨胀大于平行于纤维方向的热膨胀.随着热处理温度的升高,炭/炭复合材料中具有乱层石墨结构的晶体有序度增加,石墨化度增大,石墨片层间的范德华作用力增强,热膨胀系数减小.随着环境温度的升高热膨胀系数先增大后减小,在1200℃有最大值.
参考文献
| [1] | Savage G.Carbon-Carbon composites[M].London:Champman & Hall,1993:351-359. |
| [2] | 赵建国;李克智;白瑞成 等.炭/炭复合材料CVI工艺的热解炭沉积机理研究[J].稀有金属材料与工程,2004,33(z1):44-48. |
| [3] | Buckley J D;Edie D D.Carbon/Carbon materials and composites[M].Park Ridge,New Jersey:Noyes Publications,1993:1-17. |
| [4] | Cheng Laifei;Xu Yongdong;Litong Zhang et al.Effect of heat treatment on the thermal expansion of 2D and 3D C/SiC composites from room temperature to 1400℃[J].CARBON,2002,41(08):1645-1687. |
| [5] | 张青,成来飞,张立同,徐永东.高温处理对3D C/SiC复合材料热膨胀性能的影响[J].复合材料学报,2004(04):124-128. |
| [6] | Craig A. Taylor;Mark F. Wayne;Wilson K.S. Chiu .Heat treatment of thin carbon films and the effect on residual stress, modulus, thermal expansion and microstructure[J].Carbon: An International Journal Sponsored by the American Carbon Society,2003(10):1867-1875. |
| [7] | Piat R;Schnack E .Modeling the effect of microstructure on the coefficients of thermal expansion of pyrolytic carbon[J].CARBON,2003,41:2159-2179. |
| [8] | 李铁虎,林起浪,郑长征,杨琴.基体改性C/C复合材料在高温下的热膨胀规律[J].航空学报,2003(05):471-473. |
| [9] | Baxter RI.;Iwashita N.;Sawada Y.;Rawlings RD. .Effect of chemical vapor infiltration on erosion and thermal properties of porous carbon/carbon composite thermal insulation[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(3):441-449. |
| [10] | ZHAO Jian-guo;LI Ke-zhi;LI He-jun et al.The thermal gradient CVI process carbon/carbon composites[J].Carbon,2006,44(04):786-791. |
| [11] | 赵建国,李克智,李贺军,席琛,白瑞成,张秀莲.热处理温度对炭/炭复合材料性能的影响[J].材料热处理学报,2005(01):1-4. |
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%