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Process for preparing aluminum-glass-coated cubic boron nitride by using dry powder hierarchical packing method

A technology of cubic boron nitride and encapsulation method, which is applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of many influencing factors, susceptibility to damage, pollution, etc., and achieve safe process routes, increased service life, good lubrication wet effect

Inactive Publication Date: 2014-04-02
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, most of the cubic boron nitride modified abrasives used in industry use chemical plating, electroplating or vacuum micro-evaporation to plate a layer of simple metal, such as copper plating, nickel plating, chrome plating, titanium plating, etc. However, chemical plating and electroplating The process is complicated and the pollution is serious. The cubic nitrogen boron abrasive for vacuum micro-evaporation titanium plating is easily damaged during the high-temperature plating process, which reduces the performance of the abrasive itself.
And the plated abrasives prepared by the above method are mostly used in the manufacture of resin bonded abrasives or metal bonded abrasives, and are not suitable for vitrified bonded abrasives due to poor wettability between the coating and vitrified bond
Cubic boron nitride modified abrasives are currently suitable for vitrified bonded abrasive tools. The modification methods used include physical vapor deposition, chemical vapor deposition, and sol-gel method, etc., but various vapor deposition methods have low single-plating batches. , The cost of plating is expensive; the sol-gel method has a long cycle and many influencing factors, which are not suitable for a large number of industrial applications

Method used

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  • Process for preparing aluminum-glass-coated cubic boron nitride by using dry powder hierarchical packing method
  • Process for preparing aluminum-glass-coated cubic boron nitride by using dry powder hierarchical packing method
  • Process for preparing aluminum-glass-coated cubic boron nitride by using dry powder hierarchical packing method

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Experimental program
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Effect test

Embodiment 1

[0039] The process of preparing aluminum-glass coated cubic boron nitride by dry powder layered wrapping method, the steps are as follows:

[0040] Step (a), wrapping the outer layer of rosin on the surface of cubic boron nitride, the specific process is:

[0041] (a1) Put 10g of rosin and 12ml of ethanol (analytically pure, the same below) in the bottle to completely dissolve the rosin to prepare the ethanol solution of rosin;

[0042] (a2) Mix the cubic boron nitride (cBN for short) with the ethanol solution of the above-mentioned rosin at a ratio of 200cts:12ml, fully stir it evenly, spread it out into an open container, put it in an oven and dry it with air at room temperature until the ethanol The volatilization is complete, the rosin is dried and hardened, and then passed through a 100-mesh sieve, and the under-sieve is cubic boron nitride (s-cBN) wrapped in a uniformly dispersed rosin outer layer; among them, cBN is 120 mesh, and rosin is 300 mesh ;

[0043] In step (...

Embodiment 2

[0071] Basically the same as embodiment 1, the difference is:

[0072] In step (a), the cubic boron nitride is 120 mesh, and the rosin is 280 mesh; the dosage of the rosin, cubic boron nitride, and ethanol is: rosin 8g, cubic boron nitride 180cts, ethanol 12ml; pass through a 80-mesh sieve;

[0073] In step (b), glass powder pretreatment: after dry grinding the glass powder for 0.5 hours, melting at 1200°C for 3 hours, drying at 40°C, crushing and dry grinding for 2 hours, passing through a 280-mesh sieve; the aluminum powder is 280 mesh; In terms of mass ratio, glass powder: aluminum powder: cubic boron nitride wrapped with rosin=0.02:0.30:1.00;

[0074] In step (c), sintering and heat preservation at 760° C. in a resistance furnace for 1 hour; passing through an 80-mesh sieve.

Embodiment 3

[0076] Basically the same as embodiment 1, the difference is:

[0077] In step (a), the cubic boron nitride is 140 mesh, and the rosin is 200 mesh; the dosage of the rosin, cubic boron nitride and ethanol is: rosin 12g, cubic boron nitride 280cts, ethanol 12ml; pass through a 100 mesh sieve;

[0078] In step (b), glass powder pretreatment: after dry grinding the glass powder for 6 hours, melting at 1400°C for 1 hour, quenching with water, drying at 80°C, crushing and dry grinding for 6 hours, passing through a 320-mesh sieve; the aluminum powder is 320 mesh; in terms of mass ratio, glass powder: aluminum powder: cubic boron nitride wrapped with rosin = 0.07: 0.90: 1.00;

[0079] In step (c), sintering and heat preservation at 700° C. for 4 hours in a resistance furnace; passing through a 100-mesh sieve.

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Abstract

The invention discloses a process for preparing aluminum-glass-coated cubic boron nitride by using a dry powder hierarchical packing method. The process comprises the following steps of: coating a rosin outer layer onto the surface of the cubic boron nitride; mixing with glass powder and aluminum powder in sequence; and sintering to obtain a cubic boron nitride surface aluminum-glass-coated compound coating. In a cubic boron nitride modified grinding material prepared by using the dry powder hierarchical packing method, an aluminum-glass compound coating exists on the surface, outer-layer aluminum is molten on the surface of the cubic boron nitride and is spread in a certain degree in the presence of a middle glass coating, the coating is tightly combined with a cubic boron nitride substrate, and a special rough structure is formed on the surface of the grinding material; the performance such as single-particle compression strength, impact strength and thermal stability of the modified cubic boron nitride grinding material are improved; and the aluminum coating is oxidized to generate aluminum oxide in the coating process, so that high wetting property between the grinding material and a ceramic bonding agent is achieved during manufacturing of a ceramic bonding agent tool, and the service life of a ceramic grinding tool can be remarkably prolonged.

Description

technical field [0001] The invention belongs to the technical field of abrasive modification, and in particular relates to a process for preparing aluminum-glass coated cubic boron nitride by a dry powder layered wrapping method. Background technique [0002] At present, most of the cubic boron nitride modified abrasives used in industry use chemical plating, electroplating or vacuum micro-evaporation to plate a layer of simple metal, such as copper plating, nickel plating, chrome plating, titanium plating, etc. However, chemical plating and electroplating The process is complicated and the pollution is serious. The cubic nitrogen boron abrasives for vacuum micro-evaporation titanium plating are easily damaged during the high-temperature plating process, which reduces the performance of the abrasive itself. And the plated abrasive prepared by the above method is mostly used in the manufacture of resin bonded abrasives or metal bonded abrasives, but is not suitable for vitrif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/14
Inventor 范冰冰郭焕焕陈德良王海龙李剑张锐卢红霞许红亮杨道媛张昕
Owner ZHENGZHOU UNIV
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