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Tensile strength of plasma-sprayed alumina and/or zirconia coatings on titanium

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Abstract

The heat treatment effect on the characteristics and tensile strength of plasma-sprayed alumina, yttria-stabilized zirconia (YSZ), and mixtures of alumina and YSZ coatings on titanium was investigated. The as-sprayed structures of alumina and YSZ coatings consists of a and y alumina phases, and cubic and tetragonal zirconia phases, respectively. The tensile strength of the coatings containing a large amount of YSZ is increased from 25 to 50 MPa by heat treatment at 800 °C. The 60% YSZ-AI2O3 coating showed the highest tensile strength. The tensile strength increase of the YSZ-containing coating by heat treatment is caused by formation of 10 to 100 nm wide microcracks. The interface adhesion strength between the heat-treated titanium substrate and the alumina-containing coating is increased by chemical reaction at the in-terface. Thus, a heat-treated alumina and zirconia mixture coating may be favorable in obtaining high tensile strength due to microcrack formation in the coating and the chemical reaction at the interface.

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Authors and Affiliations

  1. Department of Material Science and Engineering, Faculty of Engineering, Kyushu Institute of Technology, 804, Kitakyushu, Japan

    K. Kishitake, H. Era & S. Baba

Authors
  1. K. Kishitake
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  2. H. Era
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  3. S. Baba
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Additional information

During this work, S. Baba was a graduate student at Kyushu Institute of Technology, Sumitomo Metal Ind. Ltd., Osaka, Japan.

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Kishitake, K., Era, H. & Baba, S. Tensile strength of plasma-sprayed alumina and/or zirconia coatings on titanium. JTST 4, 353–357 (1995). https://doi.org/10.1007/BF02648635

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  • DOI: https://doi.org/10.1007/BF02648635

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