Methods are provided for modifying a porous surface of an implantable medical device by subjecting the porous surface to a modified micro-arc oxidation process to improve the ability of the medical device to resist microbial growth, to improve the ability of the medical device to adsorb a bioactive agent or a therapeutic agent, and to improve tissue in-growth and tissue on-growth of the implantable medical device.

This invention relates to a metal component, a manufacturing method thereof, and a process chamber having the metal component, and particularly to a metal component useful in a display or semiconductor manufacturing process, a manufacturing method thereof, and a process chamber having the metal component, wherein among addition elements of an aluminum alloy that constitutes the metal substrate of the metal component, the addition element existing on the surface thereof is removed, and a barrier layer having no pores is formed, thereby solving problems attributable to a conventional anodized film having a porous layer and attributable to the addition element in the form of particles on the surface of the metal substrate.

A method of growing a hierarchically structured anodized film to an aluminum substrate including growing a Phosphoric Acid Anodizing (PAA) film layer to an aluminum substrate and growing a multiple of Tartaric-Sulfuric Acid Anodizing (TSA) film layers under the Phosphoric Acid Anodizing (PAA) film layer.

A method for treating a surface of a metallic structure, the metallic structure being made of a first metallic material, the method including the steps of: (a) releasing metallic ions from the surface of the metallic structure; and (b) depositing a nano-structured metallic layer onto the surface of the metallic structure from the released metallic ions, wherein the nano-structured metallic layer includes uniform nanoparticles.

An object of the present invention is to provide a method for producing a black-colored medical device being safe for living bodies with a shortened time for applying a pulse potential. The method for producing the black-colored medical device includes a step S1 of applying a square wave pulse potential to a stainless-steel medical device immersed in an electrolytic aqueous solution as one electrode for 40 to 90 minutes to form a colored passivation film on a surface of the medical device; and a step S3 of applying silicone to the medical device after applying the pulse potential. The method may include a step of curing a part of the medical device after the step of applying the pulse potential and before the step of applying silicone.

Disclosed are a GM type cryogenic refrigerator rotary valve and a preparation method therefor. The GM type cryogenic refrigerator rotary valve comprises an aluminum alloy rotating valve and an alumina ceramic membrane. A valve body of the aluminum alloy rotating valve is provided with a first surface for arranging a working boss and a second surface opposite to the first surface; and a high-pressure hole and a low-pressure groove are both provided in the working boss, and a vent hole is provided in the first surface; the high-pressure hole and the vent hole both penetrate the valve body, and an air chamber is formed on the second surface. The alumina ceramic membrane is plated on surface of the aluminum alloy rotating valve. The preparation method comprises: plating an alumina ceramic membrane on surface of an aluminum alloy rotating valve by means of a micro-arc oxidation process.

A method of forming a corrosion-resistant ceramic coating on a metallic substrate, the method comprising providing a passivation layer on a surface of the metallic substrate by electrochemical passivation of the metallic substrate under a first electrical current and using a first electrically conducting solution; and providing the corrosion-resistant ceramic coating on an outermost surface of the metallic substrate, the outermost surface in use adapted to be exposed to a corrosive environment, by plasma electrolytic oxidation of the metallic substrate with the passivation layer, in a second electrically conducting solution and under a second electrical current having a discharge voltage. The first and the second electrically conducting solutions comprise a tetrafluoroborate compound.

Porous solid materials are provided. The porous solid materials include a plurality of interconnected wires forming an ordered network. The porous solid materials may have a predetermined volumetric surface area ranging between 2 m.sup.2/cm.sup.3 and 90 m.sup.2/cm.sup.3, a predetermined porosity ranging between 3% and 90% and an electrical conductivity higher than 100 S/cm. The porous solid materials may have a predetermined volumetric surface area ranging between 3 m.sup.2/cm.sup.3 and 72 m.sup.2/cm.sup.3, a predetermined porosity ranging between 80% and 95% and an electrical conductivity higher than 100 S/cm. The porous solid materials (100) may have a predetermined volumetric surface area ranging between 3 m.sup.2/cm.sup.3 and 85 m.sup.2/cm.sup.3, a predetermined porosity ranging between 65% and 90% and an electrical conductivity higher than 2000 S/cm. Methods for the fabrication of such porous solid materials and devices including such porous solid material are also disclosed.

Methods are provided for modifying a porous surface of an implantable medical device by subjecting the porous surface to a modified micro-arc oxidation process to improve the ability of the medical device to resist microbial growth, to improve the ability of the medical device to adsorb a bioactive agent or a therapeutic agent, and to improve tissue in-growth and tissue on-growth of the implantable medical device.

[Technical Problem] An object is to provide a heat insulation coat having a novel form/structure different from conventional ones. [Solution to Problem] The present invention provides a heat insulation coat having a spongy body that is composed of non-linear pores and a skeleton incorporating the pores. The skeleton is an amorphous body comprising Al, Si, O, and impurities and has an amorphous peak specified by X-ray diffraction analysis at a position of 3.5 Å or more as the lattice spacing. The heat insulation coat has an apparent density of 1 g/cm.sup.3 or less, a volumetric specific heat of 1,000 kJ/m.sup.3.Math.K or less, and a thermal conductivity of 2 W/m.Math.K or less. The spongy body is obtained through forming a base layer, such as by thermal-spraying an aluminum alloy that contains a large amount of Si, and performing an anodizing process by AC/DC superimposition energization on the base layer. The amount of Si in the base layer may be, for example, 16 to 48 mass % with respect to the alloy as a whole. The heat insulation coat of the present invention is excellent in the swing characteristics and may be provided on the inner wall surface of a combustion chamber of an internal combustion engine.