J. Mater. Sci. Technol. ›› 2012, Vol. 28 ›› Issue (3): 234-240.

• Reviews • 上一篇    下一篇

Preparation of SiC fiber reinforced nickel matrix composite

张露,石南林,宫骏,孙超   

  1. 中国科学院金属研究所
  • 收稿日期:2011-03-07 修回日期:2011-06-23 出版日期:2012-03-31 发布日期:2012-03-31
  • 通讯作者: 孙超

Preparation of SiC Fiber Reinforced Nickel Matrix Composite

Lu Zhang, Nanlin Shi, Jun Gong, Chao Sun   

  1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2011-03-07 Revised:2011-06-23 Online:2012-03-31 Published:2012-03-31

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摘要： The preparation of SiC fiber reinforced nickel matrix composite is presented in this paper. Continues (Al+Al2O3)-coated SiC fiber was used to prepare the precursor wire by magnetron sputtering depositing Ni on the surface of the fiber. Ni coating combines well with the (Al+Al2O3) coating. The measured tensile strength of precursor wires is 1.18GPa and is lower than the theoretical value, which is attributed to the physical bonding between (Al+Al2O3)-coated SiC fiber and matrix coating. SiC fiber reinforced nickel matrix composite has been prepared by Solid-State Diffusion Bonding process with volume ratio of (Al+Al2O3)-coated SiC fiber of about 37%. The optimized solid-state diffusion bonding process parameters were temperature of 870℃, pressure of 50MPa and holding time of 2h. The precursor wires could diffuse well, columnar crystal of nickel disappeared after SDB process and trend to grow on (111) for nickel crystal becomes less apparent. Composite of full density was formed and barrier effect of (Al+Al2O3) coating maintains. It demonstrated that (Al+Al2O3) coating effectively restricted the reaction between SiC fiber and nickel matrix.

Abstract: A method of preparing continuous (Al+Al2O3)-coated SiC fiber reinforced nickel matrix composite was presented, in which the diffusion between SiC fiber and nickel matrix could be prevented. Magnetron sputtering is used to deposit Ni coating on the surface of the (Al+Al2O3)-coated SiC fiber in preparation of the precursor wires. It is shown that the deposited Ni coating combines well with the (Al+Al2O3) coating and has little negative effect on the tensile strength of (Al+Al2O3)-coated SiC fiber. Solid-state diffusion bonding process is employed to prepare the (Al+Al2O3)-coated SiC fiber reinforced nickel matrix with 37% fibers in volume. The solid-state diffusion bonding process is optimized and the optimum parameters are temperature of 870°, pressure of 50 MPa and holding time of 2 h. Under this condition, the precursor wires can diffuse well, composite of full density can be formed and the (Al+ Al2O3) coating is effective to restrict the reaction between SiC fiber and nickel matrix.

Key words: SiC fiber, Composite, Diffusion barrier layer, Precursor wire