Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2010, Vol. 31 ›› Issue (2): 225-227+240.DOI: -

• OriginalPaper • Previous Articles     Next Articles

Coating Al2O3 on short graphite fibers by sol-gel method

Hua, Zhong-Sheng (1); Yao, Guang-Chun (1); Ma, Jia (1); Wang, Lei (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-02-15 Published:2013-06-20
  • Contact: Hua, Z.-S.
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Abstract: Taking the aluminium isopropoxide as starting material, the Al2O3 coating about 1~2 μm thick was successfully deposited on short graphite fibers by a sol-gel method. The appropriate process conditions for the Al2O3 coating were obtained, i.e., pH value is 6, concentration of boehmite sol 0.4 mol/L and coating time 16 hr. The coating was characterized by XRD and SEM, and the results showed that the coating is pure with thickness uniformly distributed, and bonded closely to the surfaces of graphite fibers. The results of antioxidation test indicated that the antioxidability of graphite fibers is improved obviously after coating Al2O3.

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