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A Process for Electroless Nickel-Phosphorus Alloy Plating on the Surface of Aluminum-Silicon Carbide Composite Material

A composite material and surface chemical technology, applied in the field of electroless nickel-phosphorus alloy plating process, can solve the problems of complex process and high cost, and achieve the effect of simple process, low cost and bright coating

Active Publication Date: 2011-12-14
HUNAN HANGTIAN CHENGYUAN PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the relatively mature electroless nickel-phosphorus plating process for aluminum-silicon carbide composite materials in China is mainly aimed at high-volume-fraction aluminum-silicon carbide composite materials. In the lactic acid system, the electroless nickel-phosphorus plating process is controlled at 4.5 and the phosphorus content is 5.8%. The coating process when the aluminum silicon carbide composite material is used to prepare the reflector adopts zinc immersion twice, after alkaline electroless nickel and phosphorus plating, and then acidic electroless nickel and phosphorus plating, the pH is controlled at 4 to 4.5, and the phosphorus content in the coating reaches more than 11%. Re-plating AR coating, the process is more complicated and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Electroless nickel-phosphorus alloy plating is performed on the surface of an aluminum-silicon carbide composite material with a silicon carbide content of 36%, and the steps are as follows:

[0022] (1) Pretreatment of the workpiece to be plated: the surface of the workpiece to be plated (aluminum silicon carbide composite material workpiece with a silicon carbide content of 36%) is polished, placed in a polishing machine containing alumina medium, polished for 30 minutes, and washed ;

[0023] (2) Degreasing: Place the workpiece to be plated after step (1) in an aqueous solution containing 10% sodium silicate, ultrasonically clean it for 25 minutes, then wash it with deionized water and dry it;

[0024] (3) Coarsening: Soak the workpiece to be plated after step (2) in a solution composed of hydrofluoric acid, nitric acid, hydrogen peroxide and deionized water. In the soaking solution, hydrofluoric acid, nitric acid, peroxide The volume ratio of hydrogen peroxide to d...

Embodiment 2

[0029] Embodiment 2: Carry out electroless nickel-phosphorus alloy plating on the surface of an aluminum-silicon carbide composite material with a silicon carbide content of 70%, the steps are as follows:

[0030] (1) Pretreatment of the workpiece to be plated: the surface of the workpiece to be plated (aluminum silicon carbide composite material workpiece with a silicon carbide content of 70%) is polished, placed in a polishing machine containing alumina medium, polished for 40 minutes, and washed ;

[0031] (2) Degreasing: Place the workpiece to be plated after step (1) in an aqueous solution containing 12% sodium silicate, ultrasonically clean it for 35 minutes, then wash it with deionized water and dry it;

[0032] (3) Coarsening: Soak the workpiece to be plated after step (2) in a solution composed of hydrofluoric acid, nitric acid, hydrogen peroxide and deionized water. In the soaking solution, hydrofluoric acid, nitric acid, peroxide The volume ratio of hydrogen peroxi...

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Abstract

The invention discloses a process for chemical nickel-phosphorus alloy plating on the surface of an aluminum and silicon carbide composite material, which comprises the following steps: pretreating the surface of a workpiece, removing oil, roughening, activating, plating and performing heat treatment, wherein chemical plating solution consists of a nickel salt, a reducer, a complexing agent, a stabilizer, a brightener and deionized water. The process disclosed by the invention is simple, convenient for operation, low in cost, high in efficiency, widely applicable, environment-friendly and capable of realizing industrial production; and the obtaining plating is bright, flat, uniform and compact.

Description

technical field [0001] The invention relates to an electroless nickel-phosphorus alloy plating process, in particular to an electroless nickel-phosphorus alloy plating process on the surface of an aluminum-silicon carbide composite material. Background technique [0002] When aluminum silicon carbide composite materials are used in the field of electronic packaging, in addition to requiring high thermal conductivity and low thermal expansion coefficient properties, they also require weldability; when applied to optical systems as reflectors, in addition to requiring structural stability, they also require Thicker coating; therefore, a metal film needs to be deposited on the AlSiC composite. [0003] At present, the relatively mature electroless nickel-phosphorus plating process for aluminum-silicon carbide composite materials in China is mainly aimed at high-volume-fraction aluminum-silicon carbide composite materials. In the lactic acid system, the electroless nickel-phosph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/34
Inventor 舒阳会胡娟刘韵妍万绍平海春英秦国超胡盛青
Owner HUNAN HANGTIAN CHENGYUAN PRECISION MACHINERY
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