分别采用酚醛和沥青为先驱体,在连续SiC纤维表面进行涂层制备,采用SEM、表面能谱等分析手段系统研究了涂层组成、结构及其对SiC纤维力学性能的影响.以含碳涂层的SiC纤维和聚碳硅烷(PCS)为原料通过先驱体转化法(PIP)制备SiCf/SiC复合材料,对其微观结构及性能进行了表征.结果表明,经过涂层处理后,在连续SiC纤维表面涂敷了一层无定形碳,纤维表面缺陷得到改善,抗拉强度有所提高.采用碳涂层SiC纤维制备SiCk/SiC复合材料后,断裂韧性明显提高.通过涂层处理有效地改善了SiCf/SiC复合材料的韧性.
参考文献
[1] | Yamada R.;Igawa N.;Taguchi T. .Mechanical and thermal properties of 2D and 3D SiC/SiC composites[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2000(Pt.A):574-578. |
[2] | Lewinsohn CA.;Jones RH.;Colombo P.;Riccardi B. .Silicon carbide-based materials for joining silicon carbide composites for fusion energy applications[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2002(Pt.b):1232-1236. |
[3] | Yang W.;Kohyama A.;Noda T.;Katoh Y.;Hinoki T.;Araki H.;Yu J. .Interfacial characterization of CVI-SiC/SiC composites[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2002(Pt.b):1088-1092. |
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