Preparation method of nickel coated ceramic composite powder based on selective laser melting molding

A selective laser melting and ceramic powder technology, which is applied in liquid chemical plating, transportation and packaging, metal processing equipment, etc., can solve the problem of affecting the yield of nickel-coated boron nitride, hexagonal boron nitride is easy to agglomerate, and the specific surface area is small To achieve the effect of improving the plating quality, speeding up the reaction speed and increasing the specific surface area

Active Publication Date: 2020-05-22
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] CN 106623908A discloses a method for preparing micron-sized hexagonal boron nitride composite powder coated with electroless nickel plating. It uses traditional electroless nickel plating to form a coating on the surface of boron nitride, which has an obvious core-shell structure, but the hexagonal Boron nitride is easy to agglomerate during nickel plating, and the quality of nickel coating is poor
[0009] CN 109807324A discloses a preparation method of coating nano-scale hexagonal boron nitride sheet by electroless nickel plating, which aims at the defect that boron nitride is easy to agglomerate in the nickel plating process, adding materials such as dispersant, stabilizer, and complexing agent , has a good dispersion effect, but because the surface of boron nitride has not been roughened, the specific surface area is small, which affects the yield of nickel-coated boron nitride

Method used

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  • Preparation method of nickel coated ceramic composite powder based on selective laser melting molding
  • Preparation method of nickel coated ceramic composite powder based on selective laser melting molding
  • Preparation method of nickel coated ceramic composite powder based on selective laser melting molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]Take 35ml of formic acid and 4ml of 30% hydrogen peroxide, and mix them evenly to obtain an etching solution.

[0044] Add 2g Al to the etchant 2 o 3 powder, magnetically stirred for 30 minutes, filtered, washed twice with deionized water and once with absolute ethanol, and dried in an oven at 65°C for 2 hours to obtain etched Al 2 o 3 powder.

[0045] Weigh 1g of stannous chloride dihydrate, dissolve it in 2ml of concentrated hydrochloric acid, and dilute to 50ml with deionized water to obtain a sensitization solution.

[0046] Weigh 0.025g of palladium chloride, dissolve it in 0.5ml of concentrated hydrochloric acid, and dilute to 50ml with deionized water to obtain an activation solution.

[0047] The above etched Al 2 o 3 The powder was placed in the sensitizing solution, stirred magnetically for 30 minutes, centrifuged, washed twice with deionized water and once with absolute ethanol to obtain sensitized Al 2 o 3 powder.

[0048] Finally, the sensitized Al ...

Embodiment 2

[0067] Take 30ml of formic acid and 4ml of 30% hydrogen peroxide, and mix them evenly to obtain an etching solution.

[0068] Add 1.5g ZrO to the etchant 2 powder, magnetically stirred for 60 minutes, filtered, washed three times with deionized water, washed twice with absolute ethanol, and dried in an oven at 70°C for 1 hour to obtain etched ZrO 2 powder.

[0069] Weigh 0.5g of stannous chloride dihydrate, dissolve it in 1ml of concentrated hydrochloric acid, and dilute to 50ml with deionized water to obtain a sensitization solution.

[0070] Weigh 0.02g of palladium chloride, dissolve it in 0.3ml of concentrated hydrochloric acid, and dilute to 50ml with deionized water to obtain an activation solution.

[0071] The above etched ZrO 2 The powder was placed in the sensitizing solution, stirred by magnetic force for 40 minutes, centrifuged, washed 3 times with deionized water and 2 times with absolute ethanol to obtain sensitized ZrO 2 powder.

[0072] Finally, the sensit...

Embodiment 3

[0086] Take 40ml of formic acid and 4ml of 30% hydrogen peroxide, and mix them evenly to obtain an etching solution.

[0087] Add 2.5g of SiC powder into the etching solution, stir magnetically for 60min, filter, wash with deionized water 4 times, wash with absolute ethanol 3 times, and dry in an oven at 80°C for 0.5h to obtain etched SiC powder.

[0088] Weigh 2g of stannous chloride dihydrate, dissolve it in 3ml of concentrated hydrochloric acid, and dilute to 50ml with deionized water to obtain a sensitization solution.

[0089] Weigh 0.05g of palladium chloride, dissolve in 0.75ml of concentrated hydrochloric acid, and dilute to 50ml with deionized water to obtain an activation solution.

[0090] The above-mentioned etched SiC powder was placed in a sensitization solution, magnetically stirred for 50 min, centrifuged, washed 4 times with deionized water and 3 times with absolute ethanol to obtain a sensitized SiC powder.

[0091] Finally, the sensitized SiC powder was pla...

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Abstract

The invention discloses a preparation method of nickel coated ceramic composite powder based on selective laser melting molding. The preparation method comprises the following steps of etching ceramicpowder by an etching liquid composed of formic acid and hydrogen peroxide; then sensitizing and activating the etched ceramic powder by a conventional method; and putting the ceramic powder in a chemical nickel-plating solution to react to obtain uniformly coated nickel coated ceramic composite powder. The nickel coated ceramic composite powder prepared by the invention is uniform in size distribution and high in quality of a nickel plate. A cobalt-chromium alloy is modified by the nickel coated ceramic composite powder. A cobalt-chromium alloy part is prepared by selective laser melting molding. The wear rate of the cobalt-chromium alloy part is lower than that of a common cobalt-chromium alloy, and the hardness and tensile strength of the cobalt-chromium alloy part are superior to thoseof the common cobalt-chromium alloy, so that the cobalt-chromium alloy part is suitable for being used as an orthopaedic implant, in particular artificial hip joint prosthesis.

Description

technical field [0001] The invention belongs to the technical field of composite powder modification for metal matrix composite materials, and relates to a method for preparing nickel-coated ceramic composite powder. The nickel-coated ceramic composite powder prepared by the invention is used for cobalt-chromium alloy for selective laser melting and forming. modified. Background technique [0002] Selective Laser Melting (SLM) technology is based on digital model files, through software layered discrete and numerical control forming system, using laser beam to selectively melt each layer of metal powder material, and gradually stacking and forming to construct metal parts. [0003] Compared with the traditional process, the selective laser melting molding 3D printing technology is used in the preparation of medical metal implants, which can quickly and accurately customize personalized metal implants according to different bone characteristics, thereby overcoming the limitat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B33Y70/10C23C18/18C23C18/34
CPCC23C18/34C23C18/1889B33Y70/00B22F1/17
Inventor 刘炜曹玉阴建能王建宏赵占勇李忠华白培康
Owner ZHONGBEI UNIV
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