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Method for preparing nickel modified hexagonal BN and sealing material of nickel modified hexagonal BN in chemical plating solution

An electroless nickel plating and electroless plating technology, which is applied in the field of preparing nickel-modified hexagonal BN and its sealing materials, can solve the problems of fast nickel particle deposition and easy agglomeration, so as to reduce agglomeration, improve wetting performance and stability Improved effect

Inactive Publication Date: 2018-08-03
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a method for preparing uniformly dispersed nickel-modified hexagonal BN in the electroless plating solution, which is used to solve the deposition of nickel particles separated out in the electroless plating process in the prior art Fast speed, easy reunion and other issues

Method used

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  • Method for preparing nickel modified hexagonal BN and sealing material of nickel modified hexagonal BN in chemical plating solution
  • Method for preparing nickel modified hexagonal BN and sealing material of nickel modified hexagonal BN in chemical plating solution
  • Method for preparing nickel modified hexagonal BN and sealing material of nickel modified hexagonal BN in chemical plating solution

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Embodiment 1

[0043] The method for preparing uniformly dispersed nickel-modified hexagonal BN in an electroless plating solution and further preparing a sealing material, the specific steps are as follows:

[0044] (1) Weigh 30 g of hexagonal BN, ultrasonically clean it with 100 mL of ethanol for 10 min, filter, then filter it, add 50 mL of deionized water, centrifuge and dry to obtain hexagonal BN particles with clean surfaces.

[0045] (2) take each raw material by 40g / L nickel sulfate (volume here refers to the final volume of electroless nickel plating solution), 30g / L sodium citrate, 25g / L sodium hypophosphite, 20g / L boric acid, and Dissolve each raw material with a small amount of deionized water respectively, then add the nickel sulfate solution into the sodium citrate solution, mix well, then add sodium hypophosphite solution and boric acid solution to the mixed solution in turn to obtain an electroless nickel plating solution , Adjust the pH of the electroless nickel plating solut...

Embodiment 2

[0050] The method for preparing uniformly dispersed nickel-modified hexagonal BN in an electroless plating solution and further preparing a sealing material, the specific steps are as follows:

[0051] (1) Weigh 60 g of hexagonal BN, wash it with 250 mL of ultrasonic ethanol for 30 min, then filter it, add 80 mL of deionized water, and centrifuge and dry to obtain hexagonal BN particles with clean surfaces.

[0052] (2) Weigh each raw material by 50g / L nickel sulfate, 40g / L sodium citrate, 33g / L sodium hypophosphite, 25g / L boric acid, and dissolve each raw material with a small amount of deionized water respectively, and then nickel sulfate The solution is added in the sodium citrate solution, after mixing, the sodium hypophosphite solution and the boric acid solution are added successively to the mixed solution to obtain an electroless nickel plating solution, and the pH of the electroless nickel plating solution is adjusted to be 9 with aqueous sodium hydroxide solution. The...

Embodiment 3

[0057] The method for preparing uniformly dispersed nickel-modified hexagonal BN in an electroless plating solution and further preparing a sealing material, the specific steps are as follows:

[0058] (1) Weigh 40 g of hexagonal BN, ultrasonically clean it with 150 mL of ethanol for 20 min, then filter it, add 60 mL of deionized water, and centrifuge and dry to obtain hexagonal BN particles with clean surfaces.

[0059] (2) Weigh each raw material according to 55g / L nickel sulfate, 35g / L sodium citrate, 40g / L sodium hypophosphite, and 30g / L boric acid, and dissolve them with a small amount of deionized water respectively, then add the nickel sulfate solution into the sodium citrate solution, and after mixing, add sodium hypophosphite solution and boric acid solution to the mixed solution in turn to obtain an electroless nickel plating solution, adjust the pH of the electroless nickel plating solution to 9.5 with ammonia monohydrate, and then add chlorine Fe-1-butyl-3-methylim...

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Abstract

The invention provides a method for preparing nickel modified hexagonal BN and a sealing material of the nickel modified hexagonal BN in a chemical plating solution. The method comprises the followingsteps that a, the cleaned hexagonal BN is weighed; b, the chemical nickel plating solution is prepared, wherein nickel sulfate, sodium citrate, sodium hypophosphite and boric acid are weighed, wateris added for preparing the chemical nickel plating solution, then ionic liquid is added, and the solution pH is adjusted to 8-10; c, the chemical nickel plating solution prepared in the step b is heated, the hexagonal BN is added, solution solid-liquid separation is conducted after plating is finished, then, nickel modified hexagonal BN powder is obtained through treatment, and after the preparednickel modified hexagonal BN powder is subjected to tabletting forming, the sealing material is obtained after roasting. According to the method, through adding of choline chloride-ethylene glycol, the interaction between nickel particles is obviously weakened, and accordingly the phenomenon of clustering is effectively reduced. The wettability of the surface of the hexagonal BN is improved through the nickel modified hexagonal BN prepared through the method, and the nickel modified hexagonal BN can be used for preparing the sealing material with the excellent comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of surface modification of non-metallic materials, in particular to a method for preparing nickel-modified hexagonal BN and its sealing material in an electroless plating solution. Background technique [0002] In recent years, the rapid development of the aviation industry has put forward higher and higher requirements for aero-engines. High thrust, high efficiency, and low energy consumption have become the overall goals of engine design and manufacture. Reducing the gap between compressor, turbine blade tip and casing is an important means to improve engine performance, and the abradable sealing material of compressor can reduce the gap to a minimum. Therefore, abradable sealing materials gradually show their unique advantages in the development of engines. Hexagonal BN is an excellent high-temperature solid lubricant with a graphite-like layered structure and good lubricity, erosion resistance, high-tem...

Claims

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Application Information

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IPC IPC(8): C23C18/36
CPCC23C18/1639C23C18/36
Inventor 冯晶杨琼连汝娟坚
Owner KUNMING UNIV OF SCI & TECH
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