Method for producing open-pore shaped bodies made of metal with modified surfaces and shaped bodies produced using this method
A technology of hole forming and molding, which is applied in metal material coating process, liquid chemical plating, coating, etc.
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example 1
[0039] As in Working Example 1, a semi-finished part with an average pore size of 450 µm, a porosity of 95%, a size of 70 mm × 63 mm and a thickness of 1.6 mm, obtained by electrochemical coating of a porous foam composed of polyurethane The open-cell shaped body was heat-treated to remove organic components, and the open-cell shaped body was made of silver.
[0040] Subsequently, the surface of the semi-finished part, from which organic components have been removed, is coated by spraying a suspension with the following composition:
[0041] - 48% Ag 2 O metal oxide powder,
[0042] - 1.5% polyvinylpyrrolidone (PVP) binder,
[0043] - 49.5% water as solvent,
[0044] - 1% dispersant.
[0045] For this purpose, the powdered binder is first dissolved in water, then all other ingredients are added and mixed in a Speedmixer at 2000 rpm for 2 x 30 seconds to obtain a suspension.
[0046] The prepared powder suspension is sprayed several times on both sides of the semi-finished ...
example 2
[0053] A semi-finished product consisting of nickel, with an average pore diameter of 450 µm and a porosity of about 95%, with dimensions of 200 mm × 80 mm, and a thickness of 1.6 mm as an open-cell shaped body (produced by electrolytic deposition of Ni on PU foam) Part, mass 15 g MoS with mean particle size 2 Powder, a volume of 20 ml of 1% strength polyvinylpyrrolidone in water.
[0054] The semi-finished part consisting of nickel is sprayed on one side with a binder solution so that the previously opened holes are closed on one side by the binder. The semi-finished product wetted with adhesive is then fixed in a vibrating device and the side coated with adhesive is sprinkled with MoS 2 powder. The pore spaces near this surface are completely filled with agglomerate formations. Due to the vibrations, the powder is also partially distributed into the interior of the semi-finished part. The underside of the semifinished product that has been coated in this way remains uncoa...
example 3
[0066] An open-cell shaped body composed of nickel with an average pore diameter of 580 µm, a porosity of about 95%, dimensions of 75 mm × 70 mm, and thickness of 1.9 mm (made by electrolytic deposition of Ni on PU foam) was used as a semi-finished part, Titanium hydride TiH with an average particle size of 2 A powder, a mass of 0.12 g of stearamide wax with an average particle size of <80 μm was used as powder, and a volume of 20 ml of a 1% strength aqueous solution of polyvinylpyrrolidone was used as binder.
[0067] The powder and stearamide wax were mixed for 10 minutes using a Turbula mixer.
[0068] Spray the adhesive solution on both sides of the semi-finished part. The semi-finished part is then fixed in a vibrating device, and titanium hydride powder is sprinkled on both sides. Due to the vibration, the powder is distributed in the porous network of the semi-finished part. The coating with binder and powder was repeated five times so that the pore spaces had been co...
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Abstract
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