用中间相碳微球(MCMB)做原料,冷模压成型后再经过热处理后得到高密高强模压碳/石墨材料,考察了不同热处理温度对制品的力学性能的影响以及微观结构的变化.实验结果表明,与常规方法制备的碳/石墨材料相比,经过热处理的MCMB模压制品具有更高的力学性能.1 300℃热处理后MCMB模压制品的压缩强度可以达到240.8 MPa,弯曲强度达到86.1 MPa.微观结构分析表明,经过900℃热处理后的制品具有极为密实的结构,虽然在更高的温度热处理后,制品表面存在着一些小孔和微裂纹,但相对于常规碳/石墨材料而言,它们是非常微小的.另外,从高倍数SEM分析表明,MCMB是比较容易石墨化的碳材料原料.
参考文献
| [1] | 邱海鹏,宋永忠,刘朗,翟更太,史景利.掺杂硅再结晶石墨微观结构及其性能的研究[J].航空材料学报,2002(03):16-21. |
| [2] | Fitzer E .The future of carbon-carbon composites[J].Carbon,1987,25(02):163-190. |
| [3] | 邱海鹏,郭全贵,宋永忠,翟更太,刘朗.原料配比对石墨材料热传导性能的影响[J].材料科学与工艺,2002(03):225-230. |
| [4] | 宋永忠,邱海鹏,郭全贵,翟更太,宋进仁,刘朗.粘结剂含量对石墨材料电、热传导性能的影响[J].新型炭材料,2002(02):56-60. |
| [5] | Mochida I.;Kojima T.;Sakamoto H.;Yoshimura T.;Fujiura R. .CARBON DISC OF HIGH DENSITY AND STRENGTH PREPARED FROM HEAT-TREATED MESOPHASE PITCH GRAINS[J].Carbon: An International Journal Sponsored by the American Carbon Society,1995(3):265-274. |
| [6] | Wang Yong-Gang;Korai Yozo;Mochida Isao .Carbon disc of high density and strength prepared from synthetic pitch-derived mesocarbon microbeads[J].Carbon: An International Journal Sponsored by the American Carbon Society,1999(7):1049-1057. |
| [7] | HoffmannWR;Huttinger K J .Sintering of powders of polyaromatic mesophase to high-strength isotropic carbon- Ⅰ. Influence of the raw materials and sintering conditions on the properties of the carbon materials[J].CARBON,1994,32:1087. |
| [8] | Patton R D;Pittonan C U;Wang L et al.Ablation, mechanical and thermal conductively properties of vapor grown carbon fiber/phenolic matrix composites[J].Composites Part A:Applied Science and Manufacturing,2002,33(03):243-251. |
| [9] | Luo Ruiying .Effect of additives on mechanical properties of oxidation-resistant carbon/carbon composite fabricated by rapid CVD method[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(15):2109-2115. |
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%