Enhancement of Corrosion Resistance of Titanium-Copper Based Metallic Glass by Methylsiloxane Coating

• Hoshikawa Yasuto

  Materials and Structures Laboratory, Tokyo Institute of Technology

• Yasuda Eiichi

  Materials and Structures Laboratory, Tokyo Institute of Technology

• Akatsu Takashi

  Materials and Structures Laboratory, Tokyo Institute of Technology

• Onoda Toru

  Materials and Structures Laboratory, Tokyo Institute of Technology

• Sugiyama Naota

  Materials and Structures Laboratory, Tokyo Institute of Technology

• Matsushita Nobuhiro

  Materials and Structures Laboratory, Tokyo Institute of Technology

• Onoki Takamasa

  Materials and Structures Laboratory, Tokyo Institute of Technology

• Akao Masaru

  Materials and Structures Laboratory, Tokyo Institute of Technology Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University

• Tanabe Yasuhiro

  Materials and Structures Laboratory, Tokyo Institute of Technology Departments of Chemical Engineering, Nagoya University

• Yoshimura Masahiro

  Materials and Structures Laboratory, Tokyo Institute of Technology Institute for Materials Research, Tohoku University

• Zhu Shengli

  Institute for Materials Research, Tohoku University

• Wang Xinmin

  Institute for Materials Research, Tohoku University

• Inoue Akihisa

  Institute for Materials Research, Tohoku University

抄録

Bulk metallic glass composed of Ti₄₀Zr₁₀Cu₃₆Pd₁₄ (Ti-Cu BMG) has superior mechanical properties compared to titanium metal, which makes it promising for new orthopedic implant applications. We studied improvement of the surface properties of Ti-Cu BMG, focusing on enhancing corrosion resistance and adding bioactivity with a methylsiloxane (MS) coating. The MS was prepared by hydrolysis polymerization of methyltriethoxysilane, and was coated onto Ti-Cu BMG by dipping and drying at 80 °C. The ability of the MS coating to reduce Cu ion elution from the Ti-Cu BMG was investigated by autoclaving coated disks at 121 °C for one hour in a hydrochloric acid solution controlled at pH 0.4 to 4. Cu ion elution from MS-coated Ti-Cu BMG was very low (less than 1000 ppb); this value was less than half that from uncoated Ti-Cu BMG. The MS coating retained sufficient adhesion to the Ti-Cu BMG even after the autoclave tests. The mechanism of Cu ion elution through the MS coating film appeared to be via steady-state diffusion, and the degree of reduction in ion elution was dependent on the coating thickness. Bioactivity was added by coating the Ti-Cu BMG with a calcium-containing methylsiloxane (MS-Ca) layer. The coating formed a double-layered structure of bone-like apatite after soaking in a simulated body fluid for 3 days. A series of tests indicated that MS-Ca and MS coatings were useful for improving corrosion resistance and for adding bioactivity. MS coated Ti-Cu BMG is therefore a promising material for biomedical applications.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 50 (6), 1334-1339, 2009

  公益社団法人 日本金属学会

キーワード

• bulk metallic glass
• bioactivity
• corrosion resistance
• methylsiloxane coating

詳細情報

• CRID: 1390001204249909504
• NII論文ID: 10024815786
• NII論文ID: 130004454253
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.me200808
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 10237148
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10237148
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/50/6/50_ME200808/_pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
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