動電位分極実験ならびに組織観察によるパラジウム無添加歯科用貴金属合金の耐食性評価

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  • Corrosion resistance evaluation of Pd-free precious dental alloys by potentiodynamic polarization measurements and microstructure observation

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Corrosion resistance of nine experimental Pd-free Ag-Au-Pt-Cu dental alloys and a commercial Ag-Pd-Cu-Au alloy containing 12% Au in a 0.9% NaCl solution was evaluated by means of potentiodynamic polarization measurement. Microstructures of the sample surface after the forward scanning up to 1.0 V were observed by an optical microscope and a scanning electron microscope (SEM). It was found that the corrosion resistance of the experimental Pd-free Ag-Au-Pt-Cu dental alloys was controlled by Ag-Au-rich matrix phase and these alloys have the potential of the clinical application from the viewpoint of corrosion resistance.

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  • 歯科材料・器械

    歯科材料・器械 28 (5), 231-, 2009-09-10

    一般社団法人日本歯科理工学会

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