ポーセレン前装コーヌスクローネ用合金に関する研究　第４報　チタン含有コバルトクロム合金へのＺｒ添加による物理的性質，焼付強度について

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  • Studies on Porcelain-Facing Alloys for Conical Double-Crown Telescopic Prosthesis. Part 4. Change of Physical Properties and Bond Strength with Addition of Zr in Cobalt-Chrome Alloys Containing Titanium.
  • Part 4. Change of Physical Properties and Bond Strength with Addition of Zr in Cobalt-Chrome Alloys Containing Titanium
  • 第4報チタン含有コバルトクロム合金へのZr添加による物理的性質, 焼付強度について

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To develop porcelain-facing alloys for conical double-crown telescopic prosthesis, several alloys were manufactured by adding 0.5%, 1.0%, 1.5% Zr to a Co-Cr alloy containing 2% titanium.<BR>Physical and mechanical properties and the bond strength of these alloys were examined to investigate the optimal amount.<BR>The following results were obtained:<BR>1. Oxidation at the melting point of the alloy were reduced by the addition of Zr.<BR>2. The value of Vickers hardness were reduced by the addition of Zr.<BR>3. The value of contraverse strength and elastic constant were reduced by the addition of Zr.<BR>4. The bond strength was increased by the addition of 0.5% Zr, and the optical value was obtained at 1, 050° under reduced pressure.<BR>5. The optimal additional amount was 0.5% for porcelain-facing alloys for conical double-crown telescopic prosthesis.<BR>6. The bond strength was increased by the addition of Zr, because the form of Cr2Co3and CoO at the oxide layer were restrained.

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