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Surface-modified magnesium alloy

A surface modification and magnesium alloy technology, which is applied in the coating process of metal materials, prosthesis, superimposed layers, etc., can solve the problems of medical devices that cannot function normally, and achieve excellent mechanical properties, excellent deformation properties, Excellent elongation effect

Active Publication Date: 2021-11-16
JAPAN MEDICAL DEVICE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] On the other hand, the degradation rate of biodegradable materials in the organism must be proportional to the regeneration rate of the tissue. If the degradation rate of the magnesium alloy is too fast, it will lose its stability before the damaged tissue recovers, and it will not be able to function normally. The original function of the device, on the other hand, if the degradation rate is too slow, it will cause problems such as complications

Method used

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manufacture example

[0121] As materials, high-purity raw metal lumps of Mg, Zn, Mn, and Zr were prepared. These high-purity raw material metal ingots were weighed and put into crucibles so that the respective metals had the component concentrations shown in Table 1, and the melts obtained by melting and stirring at 730°C were cast to produce ingots. , to obtain the magnesium alloys of Production Example 1 and Production Example 2 in which the proportion of the main components is within the scope of the present invention. Rare earth elements and aluminum, which are unavoidable impurities, are not contained in the raw materials used. As the magnesium raw metal block, a magnesium raw material block with a low concentration of impurity Cu and a purity of 99.99% is used, and iron and nickel are removed from the molten metal by performing iron removal treatment in a furnace. The impurity concentration of the sample obtained as described above was measured using an ICP emission spectrometer (manufactur...

manufacture example 3

[0131] As materials, high-purity raw metal lumps of Mg, Zn, Mn, and Zr were prepared. These high-purity raw metal ingots were weighed and put into crucibles so that each metal had the component concentrations described below, and the melts obtained by melting and stirring at 730° C. were cast to produce ingots. Rare earth elements and aluminum, which are unavoidable impurities, are not contained in the raw materials used.

[0132]As the magnesium raw metal block, a magnesium raw metal block with a low concentration of impurity Cu and a purity of 99.9% was used, and iron removal treatment was performed in a furnace to remove iron and nickel from the molten metal.

[0133] The impurity concentration of the obtained ingot was measured using an ICP emission spectrometer (manufactured by Agilent Technologies, Inc., AGILENT 720 ICP-OES).

[0134] The component concentration (mass %) of the obtained ingot was as follows, and did not contain aluminum and rare earth.

[0135] The rem...

Embodiment 1

[0148] The mirror-like magnesium alloy substrate A was immersed in a 27M hydrofluoric acid aqueous solution and shaken at 100 rpm. The sample taken out after 24 hours was sufficiently ultrasonically cleaned with water and acetone, and then dried at 60° C. for 24 hours under reduced pressure to obtain a sample in which a magnesium fluoride layer (thickness 1 μm) was formed. A diamond-like carbon layer was formed to a thickness of 1 μm on this sample by the CVD method, thereby obtaining a sample having a diamond-like carbon layer on a magnesium fluoride layer.

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Abstract

Provided are: a magnesium alloy of which the surface is modified so as to improve the corrosion resistance of the magnesium alloy; and a method for manufacturing the magnesium alloy. (1) A surface-modified magnesium alloy comprising a magnesium alloy having an arbitrary shape, a magnesium fluoride layer formed by fluorinating the surface of the magnesium alloy, and diamond-like carbon layer formed on the magnesium fluoride layer. (2) A method for manufacturing a surface-modified magnesium alloy, the method comprising: fluorinating the surface of a magnesium alloy having an arbitrary shape to form a magnesium fluoride layer on the surface of the magnesium alloy; placing the magnesium alloy having the magnesium fluoride layer formed thereon in a high-frequency plasma CVD device; and introducing a raw material gas containing carbon into the device to form diamond-like carbon layer on the magnesium fluoride layer.

Description

[0001] related application [0002] This application claims the priority of Japanese Patent Application No. 2019-62875 filed in Japan on March 28, 2019 and Japanese Patent Application No. 2020-001521 filed in Japan on January 8, 2020, the entire contents of which are incorporated herein by reference It is incorporated as part of this application. technical field [0003] The invention relates to a surface-modified magnesium alloy (also called coated modified magnesium alloy) which protects the surface of the biodegradable magnesium alloy by coating the surface of the biodegradable magnesium alloy with a corrosion inhibiting layer. The surface-modified magnesium alloy of the present invention can be used as an implant in orthopedic surgery, oral surgery, orthopedic surgery, cardiovascular surgery or brain surgery, and the like. Background technique [0004] In modern medical technology, implants are widely used as supports for surgical purposes, or for attaching or fixing ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C23C28/04A61L31/02A61L31/08A61L31/12A61L27/04A61L27/30
CPCC22C23/04C23C28/04C23C28/00C23C28/046C23C8/80C23C8/40C23C8/42C23C16/26C23C16/505A61L27/047A61L27/303A61L27/34A61L27/58A61L2400/18A61L2430/02A61L31/028A61L31/084A61L31/10A61L31/148A61L31/16A61L27/54C08L67/04A61L31/024
Inventor 山下修藏佐佐木诚和田晃
Owner JAPAN MEDICAL DEVICE TECH
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