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Hydrothermal Surface Modification of a Low Modulus Ti-Nb Based Alloy
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Fundamental Research Fund for the Central Universities (xjj2011096); Natural Science Foundation of China (50901058); Opening Research Fund of State Key Laboratory of Porous Metal Materials (PMM-SKL-2-2012)

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    Abstract:

    A low modulus near b type titanium alloy (Ti-25Nb-3Zr-2Sn-3Mo, or TLM alloy) was subjected to hydrothermal treatments with a urea solution at different temperatures followed by heat treatment. The surface structure, the chemical composition, adhesion and hydrophilicity of the treated TLM alloy were investigated by SEM, XRD, XPS, Rockwell-C indentation test and contact angle measurement. The results show that nanosheet films of ammonium titanate can be formed at 105 and 120 °C, while the nanoparticle film of anatase TiO2 containing Nb2O5 is formed at 150 °C on the alloy surface. The subsequent annealing heat treatment at 400 °C can decompose the ammonium salts and crystallize titania. The obtained oxide films have a good adhesion. The duplex treatment has enhanced the hydrophilicity of the TLM alloy, and it would be good for its biocompatibility.

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[Fu Tao, Liu Baoguo, Dong Binghui, Su Wei, Fan Jitang, Ge Yuan. Hydrothermal Surface Modification of a Low Modulus Ti-Nb Based Alloy[J]. Rare Metal Materials and Engineering,2014,43(2):291~295.]
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  • Received:February 05,2013
  • Revised:
  • Adopted:
  • Online: June 03,2014
  • Published: