分析比较了两种不同类型化学气相沉积(CVD)法制备钨芯SiC纤维的反应器,提出了改进方法,设计了一种立式冷壁反应器,并对用CVD法制备钨芯SiC纤维的工艺进行了研究.运用扫描电镜观察了制备纤维形貌,并用Weibull统计方法分析了纤维强度与其形貌之间的关系.结果表明,在不同的氢气流量和氮气流量比下,沉积速率均随沉积温度的升高而增大.总反应在较低温度区受表面反应控制,在较高温度区受质量传输控制.纤维的断裂强度大致可分为高、中、低3个区,CVD-SiC纤维的强度与其微观形貌有密切关系,缺陷的多少决定纤维强度的高低.
参考文献
| [1] | 楚增勇,冯春祥,宋永才,李效东,肖加余,王应德.先驱体转化法连续SiC纤维国内外研究与开发现状[J].无机材料学报,2002(02):193-201. |
| [2] | 邹祖讳;吴人洁.复合材料的结构与性能[M].北京:科学出版社,1999:56. |
| [3] | 郑敏;张蓬洲.化学气相沉积法制备SiC纤维[J].宇航材料工艺,1996(05):27. |
| [4] | Harold E DeBolt;George Lubin.Boron and other high-strength,high-modulus,low-density filamentary reinforcing agents,Handbook of composites[M].New York:Van Nostrand Reinhold Company,1982:171. |
| [5] | 石南林;常新春;夏非 .连续碳化硅纤维的制备方法及装置[P].CN:90106461.0,1997-08-13. |
| [6] | Cheng, TT;Stahwell, RA;Doorbar, P;Jones, IP .The microstructure of sigma 1140 exp + SiC fibres[J].Materials Science & Engineering. A, Structural Materials: Properties, Microstructure and Processing,1999(1-2):139-145. |
| [7] | 石南林;常新春.航天用新材料-CVD法SiC纤维及其复合材料[J].宇航材料工艺,1996(01):10. |
| [8] | Harold E DeBolt;Thomas W Henae .Silicon carbide filamert and method[P].USP:4068037,1976-01-02. |
| [9] | Gruber Philip;Kewney Ashleigh M;Shatwell Robert A .Process for depositing a ceramic coating on a filament[P].USP:5156883,1991-04-02. |
| [10] | D 3379-1975.Standard Test Method for Tensile Strength and Young′s Modulus for High-Modulus Single-Filament Materials[S]. |
| [11] | George D. Papasouliotis;Stratis V. Sotirchos .Experimental study of atmospheric pressure chemical vapor deposition of silicon carbide from methyltrichlorosilane[J].Journal of Materials Research,1999(8):3397-3409. |
| [12] | 肖鹏,徐永东,黄伯云.CVI法快速制备C/SiC复合材料[J].硅酸盐学报,2002(02):240-243. |
| [13] | Jack Lakcy W;Sunder Vaidaraman;Bruce N Beckloff et al.Mass transfer and kinetics of the chemical vapor deposition of SiC onto fibers[J].Journal of Materials Science,1998,13(08):2351. |
| [14] | Martineau P;Lahaye M;Pailler R.SiC filament/titanium matrix composites regarded as model composites,Part 1 filament microanalysis and strength characterization[J].Journal of Materials Science,1984(19):2731. |
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%