Research Paper

Preparation and Tensile Test of SiC Fiber Fabricated by Three-stage Chemical Vapor Deposition

Expand
  • (State Key Lab of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China)

Received date: 2009-11-25

  Revised date: 2010-01-14

  Online published: 2010-07-19

Abstract

Continuous silicon carbide (SiC) fiber with carbon coating was fabricated by three-stage chemical vapor deposition (CVD) on W filament heated by direct current (DC), using CH3SiCl3 as gaseous reactant for SiC as well as C2H2 for the outmost carbon coating. Young’s modulus and tensile strength of the fiber were tested at room temperature, while Weibull distribution was conducted for evaluation of the tensile properties of the fiber. Fracture morphology, phase structure and microstructure of the fiber were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD) and transmission electron microscope (TEM). Results show that the SiC fiber, from W core to outside, exhibits a W/SiC interfacial reaction layer with a thickness of about 0.35μm, two layers of SiC and an even carbon coating. XRD pattern indicates that the SiC layers are all composed of β-SiC, which corresponds to diffraction angle of 35.6°, 60.1°, 72.1° and 75.7°. The mean tensile strength and Weibull modulus of the fiber reach 3266 MPa and 16.3, respectively. Furthermore, fracture mechanism of the fiber is discussed.

Cite this article

ZHANG Rong-Jun, YANG Yan-Qing, SHEN Wen-Tao . Preparation and Tensile Test of SiC Fiber Fabricated by Three-stage Chemical Vapor Deposition[J]. Journal of Inorganic Materials, 2010 , 25(8) : 840 -844 . DOI: 10.3724/SP.J.1077.2010.00840

References

[1]杨延清, 朱 艳, 陈 彦, 等(YANG Yan-Qing, et al). SiC纤维增强Ti基复合材料的制备及性能. 稀有金属材料与工程(Rare Metal Mat.Eng.), 2002, 31(3): 201-204.
[2]Preuss M, Rauchs G, Withers P J, et al. Interfacial shear strength of Ti/SiC fibre composites measured by synchrotron strain measurement.Composites A,2002, 33(10):1381-1385
[3]Luo X, Yang Y Q, Liu C X, et al. The fabrication and property of SiC fiber reinforced copper matrix composites.Mater. Sci. Eng. A,2007, 459(1/2):244-250
[4]Ning X J, Pirous P. The microstructure of SCS-6 SiC fiber.J. Mater. Res,1991, 6(10):2234-2248
[5]Cheng T T, Jones I P, Shatwell R A, et al. The microstructure of sigma 1140+ SiC fibres.Mater. Sci. Eng. A,1999, 260(1/2):139-145
[6]石南林, 刘清民, 常新春(SHI Nan-Lin, et al). SiC纤维的强度与表面微观形貌. 金属学报(Acta Metall. Sin.), 1990, 26(3): 225-228.
[7]杨延清, 文 琼, 马志军, 等. SiC/Ti-6Al-4V复合材料界面反应的扫描电镜分析. 稀有金属快报, 2004, 23(7): 22-25.
[8]徐 婷, 杨延清, 刘翠霞, 等. CVD法SiC纤维的强度测试及评价. 西北工业大学学报, 2006, 24(3): 342-345.
[9]蔡 杉, 李占一, 董 妍, 等. SiC纤维直流电阻加热CVD工艺研究. 材料工程, 2005(10): 47-51.
[10]García-Leiva M C, Oca-a I, Martín-Meizoso A, et al. Fracture mechanics of Sigma SM1140+ fibre.Engineering Fracture Mechanics,2002, 69(9):1007-1013
[11]Guo S Q, Kagawa Y, Tanaka Y, et al. Microstructure and role of outermost coating for tensile strength of SiC fiber.Acta Mater,1998, 46(14):4941-4945
[12]罗恒军, 杨延清, 黄 斌, 等. C涂层对SiC纤维增强Ti基复合材料界面行为的影响. 材料工程, 2009(3): 13-17.
[13]Chollon G, Naslain R, Rrentice C, et al. High temperature properties of SiC and diamond CVD-monofilaments.Journal of the European Ceramic Society,2005, 25(11):1929-1942
[14]Nyutu K E, Suib L S. Experimental design in the deposition of BN interface coatings on SiC fibers by chemical vapor deposition.Surface and Coating Technology,2006, 201(6):2741-2748
[15]乔生儒. 复合材料细观力学性能. 西安: 西北工业大学出版社, 1997: 22-24.
[16]Guo C Y, Zhang C B, He L L, et al. Microstructure characterization of long W core SiC fiber.J. Mater. Sci. Technol,2007, 23(5):677-684

Outlines

/