公开(公告)号：US09155816B2

公开(公告)日：2015-10-13

申请号：US13709519

申请日：2012-12-10

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Sachiko Hiromoto ,  Akiko Yamamoto ,  Norio Maruyama ,  Toshiji Mukai ,  Hidetoshi Somekawa

IPC: A61L27/00 ,  A61L27/04 ,  A61L27/32 ,  A61L27/58 ,  C23C22/22

CPC classification number: A61L27/00 ,  A61L27/047 ,  A61L27/32 ,  A61L27/58 ,  C23C22/22

Abstract: A magnesium-based medical device which can adjust a degree of corrosion within a wide range of period such that the device can maintain a sufficient strength only during a desired period and disappears within a desired period thereafter and a manufacturing method thereof are provided. A magnesium-based medical device of the present invention is a magnesium-based medical device in which a base material is made of magnesium or a magnesium alloy, wherein a corrosion-resistant film is formed on a surface of the base material, and variation in surface hardness of the formed corrosion-resistant film in the in-plane direction is less than 21 in terms of a dispersion value of Vickers hardness.

Abstract translation: 一种可以在宽范围内调节腐蚀程度的镁基医疗装置，使得该装置只能在期望的时间段内保持足够的强度并在此后期望的时间内消失，并提供其制造方法。 本发明的镁系医疗装置是基材由镁或镁合金制成的镁基医疗装置，其中，在基材的表面上形成耐腐蚀性膜， 所形成的耐腐蚀膜在面内方向的表面硬度以维氏硬度的分散值计小于21。