Method for preparing nano composite material by supercritical fluid electroforming

Abstract

The invention discloses a method for preparing nano composite material by supercritical fluid electroforming, which comprises the following steps of: (1) adding metal salt solution, nano granules and composite additive into a reactor of an electroforming device, stirring uniformly, introducing carbon dioxide gas, and stirring at the temperature of between 35 and 50 DEG C under the pressure of 8 to 20MPa to generate supercritical fluid electroforming solution containing the nano granules; (2) setting pulse interval at 1 to 5 microseconds, setting the pulse width at 10 to 30 microseconds, setting the current density at 1 to 3A / dm<2>, switching on a direct-current power supply, and making the metal ions and the nano granules in the metal salt solution deposited on a cathode template togetherto obtain a nano composite electroforming layer; and (3) after the deposition is completed, obtaining the nano composite material by corresponding treatment. The method can electroform the nano composite material electroforming layer with uniform nano granule dispersion, flat surface, compact tissue, fine crystal grain and excellent performance.

Description

technical field [0001] The invention belongs to the field of electrochemical processing, and in particular relates to a method for preparing nanocomposite materials by supercritical fluid electroforming. Background technique [0002] The principle of the composite electroforming process is to add particles with special properties such as ceramics and diamonds into the electroforming solution, use the conductive original mold (or metal parts) as the cathode, and use the metal plate for electroforming as the anode. Under the action of the electric field, the metal ions continuously capture the particles, reduce them to metal at the cathode, and deposit on the surface of the cathode together. During this period, the anode metal continuously turns into ions and dissolves into the electroforming solution for replenishment, so that the concentration of metal ions in the solution remains constant. When the composite electroformed layer of the cathode original mold gradually reache...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a supercritical fluid with uniform dispersion of nanoparticles, smooth surface, dense structure, fine grains and excellent performance in view of the problems that nanoparticles are easy to agglomerate in the electroforming process and the uniformity of the electroforming layer is not easy to control. Method for preparing nanocomposite materials by electroforming

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