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Functional member from co-based alloy and process for producing the same

外国特許コード F110005298
整理番号 A281-08WO
掲載日 2011年8月31日
出願国 アメリカ合衆国
出願番号 09877108
公報番号 20110041966
公報番号 8021499
出願日 平成20年4月7日(2008.4.7)
公報発行日 平成23年2月24日(2011.2.24)
公報発行日 平成23年9月20日(2011.9.20)
優先権データ
  • 特願2005-296848 (2005.10.11) JP
  • 2006WO-JP320689 (2006.10.11) WO
発明の名称 (英語) Functional member from co-based alloy and process for producing the same
発明の概要(英語) (US8021499)
A Co-based alloy having a fundamental composition of Co—Al system containing 3-15% Al and having lamellar structure wherein f.c.c. structure α-phase and &bgr;(B2)-phase are superimposed on each other in layers, and the Co-based alloy is modified so as to have a porous surface layer region effective for chemical retaining capability, sustained release, biocompatibility, etc. through selective removal of either the α-phase or the &bgr;-phase from the surface layer.
As a third component, at least one member selected from among Ni, Fe, Mn, Ga, Cr, V, Ti, Mo, Nb, Zr, W, Ta, Hf, Si, Rh, Pd, Ir, Pt, Au, B, C and P may be contained in a total amount of 0.001 to 60%.
特許請求の範囲(英語) [claim1]
1. A functional member from a Co-based alloy comprising: a base member of a Co -- Al alloy containing 3 to 15% by mass of Al; and
a lamellar structure wherein the occupancy ratio is 30% by volume or more, a f.c.c. structure alpha -phase and beta (B2)-phase with an interlayer spacing of 100 mu m or less are repeated in layers, and the surface of the base member is modified so as to have a porous surface layer region through selective removal of the alpha -phase or the beta (B2)-phase.
[claim2]
2. The functional member from a Co-based alloy according to claim 1, further comprising a base member of a Co-based alloy having a composition which comprises, on the basis of mass percent, 3 to 15% of Al and further comprises one or more members selected from the following: 0.01 to 50% of Ni, 0.01 to 40% of Fe, 0.01 to 30% of Mn, 0.01 to 40% of Cr, 0.01 to 30% of Mo, 0.01 to 5% of Si, 0.01 to 30% of W, 0.01 to 10% of Zr, 0.01 to 15% of Ta, 0.01 to 10% of Hf, 0.01 to 20% of Ga, 0.01 to 20% of V, 0.01 to 12% of Ti, 0.01 to 20% of Nb, 0.001 to 3% of C, 0.01 to 20% of Rh, 0.01 to 20% of Pd, 0.01 to 20% of Ir, 0.01 to 20% of Pt, 0.01 to 10% of Au, 0.001 to 1% of B, and 0.001 to 1% of P in a total of 0.001 to 60% and with inevitable impurities.
[claim3]
3. The functional member from a Co-based alloy according to claim 1, wherein the porous surface layer region has a depth of 500 nm or more below the surface of the base member and the area of the porous surface layer region is 1.5 times more than that of the surface area before porous formation.
  • 発明者/出願人(英語)
  • ISHIDA KIYOHITO
  • YAMAUCHI KIYOSHI
  • KAINUMA RYOSUKE
  • SUTOU YUJI
  • OMORI TOSHIHIRO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
参考情報 (研究プロジェクト等) CREST The Innovation of Simulation Technology and the Construction of Foundations for Its Practical Use AREA
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