Publication number: 20110041966
Abstract: A Co-based alloy having a fundamental composition of Co—Al binary system containing 3-15% Al and having lamellar structure wherein f.c.c. structure ?-phase and ?(B2)-phase are superimposed on each other in layers, which 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 ?-phase or the ?-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%.
Type:
Application
Filed:
April 7, 2008
Publication date:
February 24, 2011
Applicant:
JAPAN SCIENCE AND TECHNOLOGY AGENCY
Inventors:
Kiyohito ISHIDA, Kiyoshi YAMAUCHI, Ryosuke KAINUMA, Yuji SUTOU, Toshihiro OMORI
Publication number: 20080185075
Abstract: A Co-based alloy being useful as a spiral spring, common spring, wire, cable guide, steel belt, build-up material, guide wire, stent, catheter, etc. There is provided a Co-based alloy having a composition of Co—Al binary system containing 3-13% Al loaded with at least one workability enhancing element selected from among 001 to 50% Ni, 0.01 to 40% Fe and 0.01 to 30% Mn and having a lamellar structure wherein f.c.c. structure ?-phase and ?(B2)-phase are repeated in layers. The lamellar structure is so regulated that the occupancy ratio of the whole structure is 30 vol. % or above and the layer spacing is 100 ?m or less. The Co-based alloy may contain at least one optional component selected from among Ga, Cr, V, Ti, Mo, Nb, Zr, W, Ta, Hf, Si, Rh, Pd, Ir, Pt, Au, B, C and P may be added in a total amount of 0.01 to 60%.
Type:
Application
Filed:
April 7, 2008
Publication date:
August 7, 2008
Applicant:
JAPAN SCIENCE AND TECHNOLOGY AGENCY
Inventors:
Kiyohito ISHIDA, Kiyoshi YAMAUCHI, Ryosuke KAINUMA, Yuji SUTOU, Toshihiro OMORI