本文采用化学气相渗透技术(CVI)对泡沫炭进行复合处理,利用SEM、XRD等分析手段对石墨化样品进行了分析.研究结果表明,CVI热解炭在泡沫基体的沉积方式是:小颗粒积聚生长成为大颗粒·大颗粒不断接合,经石墨化处理后形成更加规则的结构.石墨化CVI泡沫炭相比原生石墨泡沫炭的电学和力学性能有很大提高,在350*C、2MPa压力条件下制备的石墨化CVI泡沫炭的电导率可以提高近0.9倍;在350"C、1MPa压力条件下制备的石墨化CVI泡沫炭的压缩强度增大近3.5倍.因此,CVI处理可以有效改善石墨泡沫炭的基体结构,提高石墨泡沫炭性能.
参考文献
| [1] | Nidia C. Gallego;James W. Klett .Carbon foams for thermal management[J].Carbon: An International Journal Sponsored by the American Carbon Society,2003(7):1461-1466. |
| [2] | CAO Min;ZHANG Shu;ZHOU Jian-Min et al.Preparation and applications of carbon foam[J].Journal of Materials Science and Engineering,2004,22(08):613-616. |
| [3] | Alfred H stiller;Peter G.stansberry;John W zondlo .Method of making a carbon foam material and resultant product[P].US 5888469,1999-3-30. |
| [4] | Michio Inagaki;Takahiro Morishita;Akitoshi Kuno .Carbon foams prepared from polyimide using urethane foam template[J].Carbon: An International Journal Sponsored by the American Carbon Society,2004(3):497-502. |
| [5] | James W.Klett;April D.McMillan;Nidia C.Gallego;Timothy D.Burchell;Claudia A.Walls .Effects of heat treatment conditions on the thermal properties of mesophase pitch-derived graphitic foams[J].Carbon: An International Journal Sponsored by the American Carbon Society,2004(8/9):1849-1852. |
| [6] | Sangwook Sihn;Ajit K. Roy .Modeling and prediction of bulk properties of open-cell carbon foam[J].Journal of the Mechanics and Physics of Solids,2004(1):167-191. |
| [7] | 吴峻峰,白朔,成会明.热处理对各向同性热解炭材料微观结构和力学性能的影响[C].第七届全国新型炭材料学术研讨会论文集,2005:43-48. |
| [8] | Klett J.;Romine E.;Walls C.;Burchell T.;Hardy R. .High-thermal-conductivity, mesophase-pitch-derived carbon foams: effect of precursor on structure and properties[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(7):953-973. |
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%