	US 12,264,395 B2
	Surface-modified magnesium alloy
Shuzo Yamashita, Kumamoto (JP); Makoto Sasaki, Kumamoto (JP); and Akira Wada, Kumamoto (JP)
Assigned to Japan Medical Device Technology Co., Ltd., Kumamoto (JP)
Filed by Japan Medical Device Technology Co., Ltd., Kumamoto (JP)
Filed on Sep. 27, 2021, as Appl. No. 17/486,372.
Application 17/486,372 is a continuation of application No. PCT/JP2020/013769, filed on Mar. 26, 2020.
Claims priority of application No. 2019-062875 (JP), filed on Mar. 28, 2019; and application No. 2020-001521 (JP), filed on Jan. 8, 2020.
Prior Publication US 2022/0033974 A1, Feb. 3, 2022
Int. Cl. C23C 28/04 (2006.01); A61L 31/02 (2006.01); C22C 23/04 (2006.01); C23C 16/26 (2006.01)

CPC C23C 28/04 (2013.01) [A61L 31/024 (2013.01); C22C 23/04 (2013.01); C23C 16/26 (2013.01)]

7 Claims

1. A surface-modified magnesium alloy comprising:

a magnesium alloy having an arbitrary shape;

a magnesium fluoride layer formed on the magnesium alloy via fluorination of a surface of the magnesium alloy; and

a diamond-like carbon layer formed on the magnesium fluoride layer, wherein the magnesium alloy contains, in % by mass, 0.95 to 2.00% Zn, 0.05% or more and less than 0.30% Zr, 0.05 to 0.20% Mn, and the balance consisting of Mg and unavoidable impurities, with an average crystal grain size of 1.0 to 3.0 μm and a standard deviation of grain size distribution of 0.7 or less.