采用脉冲强制流动热梯度化学气相渗透(IFCVI)法制备了毡基炭/炭复合材料.借助偏光显微镜及扫描电子显微镜观察了基体热解炭的微观组织结构及断口形貌特征;用弯曲实验测定了材料的力学性能.结果表明:采用脉冲FCVI,经1 000℃～1 250℃,100h致密化,2 300℃热处理后,炭/炭复合材料的密度可达1.7g/cm3,弯曲强度为125.4 MPa,挠度为0.61 mm.该工艺致密化速率快,所制备材料的密度分布均匀、力学性能好.研究表明,温度是影响材料组织结构的主要因素,高温条件下有利于粗糙层热解炭组织的生成,而低温有利于光滑层热解炭组织的生成,一般因沉积环境复杂多变,常得到混合型组织.
参考文献
| [1] | W. KOWBEL;V. CHELLAPA;J.C. WITHERS .Properties of C/C composites produced in one low cost manufacturing step[J].Carbon: An International Journal Sponsored by the American Carbon Society,1996(6):819-821. |
| [2] | Hojo M.;Joyama N.;Takahashi J.;Ochiai S. .FRACTURE MECHANISM OF CROSS-PLY CARBON/CARBON COMPOSITES[J].Advanced Composite Materials: The Official Journal of the Japan Society of Composite Materials,1996(2):99-117. |
| [3] | 薛辉,李贺军,侯向辉,李克智,韩红梅.压力梯度CVI工艺制备2D炭/炭复合材料的弯曲断裂行为[J].新型炭材料,2004(04):289-292. |
| [4] | 李贺军.炭/炭复合材料[J].新型炭材料,2001(02):79-80. |
| [5] | 汤素芳,周星明,邓景屹,杜海峰,刘文川.CVI法制备2D C/C复合材料[J].新型炭材料,2005(02):139-143. |
| [6] | Besmann T M;Sheldon B W .Vapor-phase fabrication and pro perties of continuous-filament ceramic composites[J].Science,1991,25(06):1104. |
| [7] | Stinton D P;Caputo A J;Lowden R A .Synthesis of fiber-reinforced SiC composites by chemical vapor infiltration[J].American Ceramic Society Bulletin,1986,65(02):347-350. |
| [8] | Stinton D P;Besmann T M;Lowden R A .Advanced ceramics by chemical vapor deposition techniques[J].Ceramic Bulletin,1988,29(02):350-355. |
| [9] | Vaidyaraman S.;Freeman GB.;Agrawal PK.;Langman MD.;Lackey WJ. .FABRICATION OF CARBON-CARBON COMPOSITES BY FORCED FLOW-THERMAL GRADIENT CHEMICAL VAPOR INFILTRATION[J].Journal of Materials Research,1995(6):1469-1477. |
| [10] | Vaidyarman S;LackeyWJ;AgrawalPK et al.Carbon/carbon processing by forced flow-thermal gradient chemical vapoi infiltration using propylene[J].Carbon,1996,134(03):347-362. |
| [11] | Lewis JS.;Vaidyaraman S.;Lackey WJ. .MODEL FOR PREDICTION OF MATRIX MICROSTRUCTURE FOR CARBON/CARBON COMPOSITES PREPARED BY FORCED FLOW THERMAL GRADIENT CVI[J].Carbon: An International Journal Sponsored by the American Carbon Society,1997(1):103-112. |
| [12] | 顾正彬,李贺军,李克智,李爱军.碳/碳复合材料等温化学气相渗透工艺模糊系统建模[J].硅酸盐学报,2003(07):629-634. |
| [13] | 张守阳,李贺军,侯向辉,孙乐民.FCVI制备C/C复合材料工艺探索[J].材料研究学报,2000(04):424-430. |
| [14] | 侯向辉.FCVI工艺研究进展[J].材料工程,1998(11):38. |
| [15] | 周振中,李铁虎,艾艳玲,宋发举,林起浪.催化化学气相渗透法制备C/C复合材料[J].新型炭材料,2006(01):43-47. |
| [16] | 嵇阿琳,霍肖旭,马伯信.CLVD法制备炭毡/炭复合材料[J].新型炭材料,2002(01):41-44. |
| [17] | 张守阳,李贺军,孙军.限域变温强制流动CVI工艺制备C/C复合材料的组织及力学性能特点研究[J].炭素技术,2001(04):15-18. |
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%