チタン研磨面の表面分析 Analysis of Polished Surfaces of Titanium Castings

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著者

    • 三浦 英司 MIURA Eiji
    • 鶴見大学歯学部歯科補綴学第一講座 The First Department of Prosthetic Dentistry, Tsurumi University School of Dental Medicine
    • 高山 慈子 TAKAYAMA Yasuko
    • 鶴見大学歯学部歯科補綴学第一講座 The First Department of Prosthetic Dentistry, Tsurumi University School of Dental Medicine
    • 川井 善之 KAWAI Yoshiyuki
    • 鶴見大学歯学部歯科補綴学第一講座 The First Department of Prosthetic Dentistry, Tsurumi University School of Dental Medicine
    • 細井 紀雄 HOSOI Toshio
    • 鶴見大学歯学部歯科補綴学第一講座 The First Department of Prosthetic Dentistry, Tsurumi University School of Dental Medicine
    • 水野 行博 MIZUNO Yukihiro
    • 鶴見大学歯学部歯科技工研修科 Dental Technician Training Institute, Tsurumi University School of Dental Medicine

抄録

目的: 本研究は, 当大学で行われているチタン鋳造体の研磨法を用いた研磨面について, その表面性状の客観的な把握を目的とし, 分析を行ったものである.<BR>方法: 3種純チタンを用いた鋳造体に, 鏡面研磨および適合性を重視した研磨 (以後, 適合研磨面とする) を施し, その表面性状を検索した. as cast試料を含めた各試料は, 表面粗さの測定, 電子プローブマイクロアナライザーを用いた定性分析, 面分析を行った. また断面試料を製作し, 面および線分析を行った. as cast試料についてはビッカース硬さの測定を行った. またコントロールとして, 白金加金合金およびコバルトクロム合金試料を製作し, それぞれ分析を行った.<BR>結果: チタン適合研磨面の中心線平均粗さは1.52μmで鏡面研磨の約4倍, 白金加金およびコバルトクロム合金の約2倍であった. チタン鏡面研磨面の定性分析では, インゴット成分元素の他にC, Si, Alが, 適合研磨面ではさらにPが検出された. チタンas cast試料のビッカース硬さは最表層部が最も硬く, 表面から100-150μmまでの範囲では急激に減少した.<BR>結論: 本学のチタン研磨法による鏡面研磨面は貴金属合金と同等の研磨面が得られていると思われた. しかし, 適合研磨面は反応層や埋没材由来の元素が残存していることが確認された.

Purpose: The aim of this research was to obtain an objective grasp of the surface properties of titanium castings which are polished using a titanium polishing method developed by our university.<BR>Methods: The specimens were cast conventionally using commercially pure (CP) titanium (Grade 3, T-alloy H, GC). The cast surfaces were polished using two methods; a conventional procedure for mirror surfaces and a modified procedure consisting of minimal grinding foracceptable fit of the inner surface. The center line average roughness (Ra) wasmeasured, and then qualitative analysis and map analysis were performed using Electron Probe X-ray Microanalysis. In addition, map and line analysis on sections of the as-cast titanium specimens was performed, and the Vickers hardness of the surface was measured. As controls, Au-Pt alloy and Co-Cr alloy specimens were analyzed.<BR>Results: The Ra on the titanium inner surface was 1.52 μm, which was approximately four times higher than that on the mirror surface, and approximately two times higher than that for the Au-Pt alloy and Co-Cr alloy. The qualitative analysis of the titanium mirror surface detected elements such as C, Si, and Al as well as the ingot element. In addition, P was also detected on the titanium inner surface. The Vickers hardness was highest on the outermost surface layer, which decreased remarkably until a depth of 100-150 μm.<BR>Conclusions: It was considered that the mirror surface formed by the titanium polishing method in our university obtained a level equivalent to that of precious metals. However, a reaction layer and elements derived from the investment material remained in the titanium inner surface.

収録刊行物

  • 日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society  

    日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society 51(1), 11-21, 2007-01-10 

    Japan Prosthodontic Society

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各種コード

  • NII論文ID(NAID)
    10018731332
  • NII書誌ID(NCID)
    AN00197911
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03895386
  • データ提供元
    CJP書誌  J-STAGE 
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