Process for electrodeposition preparation of orientated short fiber reinforced metal -base composite materials

A technology of short fiber reinforcement and composite materials, applied in electrolytic coatings, electrolytic processes, electrolytic components, etc., can solve problems such as high cost, complicated equipment, and large fiber damage, and achieve convenient operation, wide applicability, and low cost. Effect

Inactive Publication Date: 2009-12-02
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Current research mainly focuses on methods such as hot pressing sintering, extrusion molding, and filter press molding, but these methods require complex equipment, high cost, and secondary processing will cause great damage to fibers, such as Huang Yueshan in "Material Development and "Application" (Vol.14 No.61999) published "Preparation and Performance Research of Short Fiber Directional Reinforced Metal Matrix Composites", which used the mixed slurry extrusion method to prepare preforms with parallel distribution of short fibers, and then pressed The composite material with directional distribution of short fibers is obtained by impregnation. The process is complex and cumbersome, and the extrusion process will damage the fibers, which is not conducive to the improvement of the performance of the composite material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Oriented distribution of Ni-SiC w Preparation of composite materials

[0017] Prepare the plating solution according to the following formula: nickel sulfamate 400g / L, nickel chloride 5g / L, boric acid 40g / L, place in a beaker after preparation, and heat to about 50°C in a water bath. The nickel processed into a round rod is used as the anode, which is fixed on the rotator, and a carbon brush is used to realize the conduction of the rotating anode. The content of silicon carbide whiskers is 10g / L. After the whiskers are washed and pickled, add 2g / L of cetyltrimethylammonium bromide, a surfactant, ultrasonically oscillate, add to the plating solution, stir evenly, and adjust the pH Standby around 4.0. The cathode is made of stainless steel plate, and the current density is controlled at 5.0A / dm 2 , the rotational speed of the anode is 2000r / min. After 5 hours of plating, take it off to get the Ni-SiC with the desired directional distribution w composite material.

Embodiment 2

[0019] Oriented distribution of Ni-Al 2 o 3w Preparation of composite materials

[0020] The plating solution formula is the same as that in Example 1: 400 g / L of nickel sulfamate, 5 g / L of nickel chloride, and 40 g / L of boric acid, which are placed in a beaker after being prepared, and the temperature is controlled at about 50° C. Pure nickel is used as the anode, and the cathode stainless steel processed into a round rod is fixed on the rotator, and carbon brushes are also used to realize the conduction of the rotating cathode. The content of alumina whiskers is 5g / L. After the whiskers are washed with water and pickled, 1g / L of surfactant sodium lauryl sulfate is added, ultrasonically oscillated, then added to the plating solution, stirred evenly, and the pH is adjusted to about 4.0. use. The current density is controlled at 2.5A / dm 2 , the cathode rotation speed is 1500r / min. After 3 hours of plating, take it off to get the desired directional distribution of Ni-Al 2...

Embodiment 3

[0022] Oriented distribution of Cu-SiC w Preparation of composite materials

[0023] The formula of the plating solution is: copper sulfate 200g / L, sulfuric acid 60g / L, put it in a beaker after preparation, and heat it to about 25°C in a water bath. Pure copper is used as the anode, stainless steel plate is used as the cathode, and the plating solution is rotated by a mechanical stirrer. The silicon carbide whisker content is 1g / L. After pretreatment, add sodium polyacrylate 0.1g / L, ultrasonically oscillate, add to the plating solution, stir well and set aside. The current density is controlled at 0.5A / dm 2 , the rotation speed is 500r / min. After 2 hours of plating, take it off to get Cu-SiC with desired orientation distribution w composite material.

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PUM

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Abstract

The invention relates to a method for preparing oriented short fiber reinforced metal matrix composite materials by electrodeposition. A circular container is selected as a plating tank, short fibers and surfactants are added to the plating solution and stirred evenly, and the plating solution is rotated during composite electrodeposition , while controlling the current density and plating time, the required oriented short fiber reinforced metal matrix composites can be obtained. On the basis of composite electrodeposition, the present invention uses a stirring device to obtain a stable rotating flow field, utilizes the regular movement of short fibers in the plating solution to realize the directional arrangement of short fibers, and then through the composite electrodeposition of matrix metal and short fibers , prepared directional distribution of short fiber reinforced metal matrix composites. The method is simple, easy to implement, low in cost and wide in applicability.

Description

technical field [0001] The invention relates to a method for preparing oriented short fiber-reinforced metal-matrix composite materials by electrodeposition, in particular to a new method for preparing metal-matrix composite materials by using the electrodeposition method to align short fibers by flow field induction. The invention belongs to the technical field of composite electrodeposition preparation. Background technique [0002] The composite electrodeposition process has great advantages compared with the traditional metal matrix composite preparation process, such as simple process operation, no need to prepare at high temperature, low cost, etc. Optimal design of the process can also obtain uniform reinforcement phase distribution. Composite coating and composite materials with larger thickness (ie composite electroforming). At the same time, composite electrodeposition can prepare not only single metal composite materials but also multiple alloy composite material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D21/10
Inventor 刘磊唐谊平胡文彬沈彬仵亚婷
Owner SHANGHAI JIAOTONG UNIV
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