Effect of Electrochemical Treatment on the Surface Structure and Tensile Strength of Carben Coated CVD SiC Fiber

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CVD (chemical vapor deposition) SiC continuous fiber is used as reinforcement of metal matrix composites because of its high strength, high stiffness and elevated temperature stability. In this work, anodic oxidation method was used to treat the surface of carbon coated SiC fiber. Then the surface of treated fiber was compared with untreated one by scan electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). SiC was detected on the surface of untreated carbon-rich coating. It is proved by XPS that SiC was transformed into SiO2 after treatment. About 100~200nm thick oxidation layer was detected on the surface of carbon-rich coating and the structure of double coatings formed. Because the surface of fiber became smooth and the tensile stress on it was relaxed after treatment, the tensile strength of fiber was improved by 8%~20% average and the dispersing ratio of it was reduced.

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Periodical:

Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.

Pages:

1571-1574

Citation:

L. Ji et al., "Effect of Electrochemical Treatment on the Surface Structure and Tensile Strength of Carben Coated CVD SiC Fiber", Materials Science Forum, Vols. 546-549, pp. 1571-1574, 2007

Online since:

May 2007

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$38.00

[1] K.T. Venkateswara Rao, S.C. Siu and R.O. Ritchie: Failue Mechanisms in SiC-Fiber Reinforced 6061 Al Alloy Composites under Monotonic and Cyclic loading�metallurgical transactions A, Volume 24A. March 1993-721.

DOI: https://doi.org/10.1007/bf02656640

[2] NL Shi: Aviation Engineering &Maintenance, 1988, 5, 23.

[3] NL. Shi: Chinese Journal of Space Science�Vol. 16�Supp�1996�68.

[4] Shojiro Ochiai And KoZo Osamura: A Computer Simulation of strength of Metal Matrix Compoites with a Reaction Layer at the Interface, Metallurgical Transactions A, Volume 18A. April 1987, 673-679.

DOI: https://doi.org/10.1007/bf02649483

[5] Shojiro Ochiai and Kozo Osamura: Influences of Matrix Ductility, Interfaial Bonding Strength , and Fiber Volume Fraction on Tensile Strength of Unidirectional Metal Matrix Composite, Metallurgical Transactions A, Volume 21A, April 1990, 971-977.

DOI: https://doi.org/10.1007/bf02656581

[6] K. Luo, NL. Shi: Chinese Journal of Materials Research, 2001, 15(1), 105-109.

[7] Kun LUO, Nanlin SHI, Yapei ZU: CVD SiC Fiber Electrochemically Treated by AC Current, JMST Vol. 19, No. 3, (2003).

DOI: https://doi.org/10.4028/www.scientific.net/msf.437-438.73

[8] Z.M. Zhu, N.L. Shi, Z.G. Wang, Y. Liang: Acta Metallurgica Sinica,. 1996, 32(9). 1003-1008 � Chinese�.