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Process of plating diamond surface with composite film

A composite film and diamond technology, applied in inorganic pigment treatment, other chemical processes, chemical instruments and methods, etc., can solve the problem that the performance of vitrified bond abrasives is not significantly improved, the diamond does not have a protective effect, and the metal coating is easy to fall off, etc. problem, to achieve the effect of strong holding force, not easy to fall off, and good wettability

Active Publication Date: 2015-04-01
GUILIN CHAMPION UNION DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unlike metal bonded diamond abrasives and resin bonded diamond abrasives, which adopt the hot pressing sintering process, the preparation process of vitrified bonded diamond abrasives is cold pressing and then sintered at high temperature. Due to the long sintering time, the active metal coated on the diamond surface Oxidation reaction will occur. Under the action of external force, the metal coating is easy to fall off, which cannot protect the diamond. In addition, during the sintering process, the vitrified bond and the metal on the surface of the diamond cannot be wetted, which improves the performance of the vitrified bonded abrasive tool. not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Soak the diamond abrasive in 1mol / L hydrochloric acid solution for 1 hour, rinse it with deionized water until it is neutral, dry it, put it in acetone solution, soak it under ultrasonic conditions for 1 hour, and finally rinse it with deionized water, dry it Dry;

[0019] 2) Mix barium acetate and glacial acetic acid at a molar ratio of 1:1, add distilled water 50 times the weight of the mixture, heat under reflux at 60°C, and stir at a high speed at 2000 rpm to prepare a stable BaO sol, and BaO sol Place it at room temperature for 6 hours, then impregnate the surface-treated diamond abrasive with BaO sol once for 1 min. After the impregnation, remove the abrasive from the BaO sol and dry it at 80°C. Calcined at 400°C for 0.5h, cooled to obtain a diamond abrasive coated with a BaO film;

[0020] 3) Mix chromium nitrate and citric acid at a molar ratio of 1:1, add distilled water 50 times the weight of the mixture, heat under reflux at 60°C, and stir at a high speed...

Embodiment 2

[0022] 1) Soak the diamond abrasive in 1mol / L hydrochloric acid solution for 1.5h, rinse it with deionized water until neutral, dry it, put it in acetone solution, soak it under ultrasonic conditions for 1.5h, and finally rinse it with deionized water ,drying;

[0023] 2) Mix barium acetate and glacial acetic acid at a molar ratio of 1:1, add distilled water 100 times the weight of the mixture, heat under reflux at 80°C, and stir at a high speed at 4000 rpm to prepare a stable BaO sol, and BaO sol Place it at room temperature for 24 hours, then impregnate the surface-treated diamond abrasive with BaO sol for 3 times, each time for 5 minutes, after each impregnation, remove the abrasive from the BaO sol and dry it at 120°C to complete the process. After the impregnation and drying process, the abrasive was calcined at 600°C for 1.5h and cooled to obtain a diamond abrasive coated with a BaO film;

[0024] 3) Mix chromium nitrate and citric acid at a molar ratio of 1:1, add dist...

Embodiment 3

[0026] 1) Soak the diamond abrasive in 1mol / L hydrochloric acid solution for 1.2h, rinse it with deionized water until neutral, dry it, put it in acetone solution, soak it under ultrasonic conditions for 1.2h, and finally rinse it with deionized water ,drying;

[0027] 2) Mix barium acetate and glacial acetic acid in a molar ratio of 1:1, add distilled water 80 times the weight of the mixture, heat under reflux at 75°C, and stir at a high speed at 3000 rpm to prepare a stable BaO sol, and BaO sol Place it at room temperature for 12 hours, then impregnate the surface-treated diamond abrasive with BaO sol twice, each time for 3 minutes, after each impregnation, remove the abrasive from the BaO sol and dry it at 100°C to complete After the impregnation and drying process, the abrasive is calcined at 500°C for 1 hour and cooled to obtain a diamond abrasive coated with a BaO film;

[0028] 3) Mix chromium nitrate and citric acid at a molar ratio of 1:1, add distilled water 150 tim...

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Abstract

The invention discloses a process of plating a diamond surface with a composite film. The process comprises the following steps: 1) performing surface treatment on a diamond grinding material; 2) mixing barium acetate with glacial acetic acid to prepare stable BaO sol, soaking the grinding material with the BaO sol, and drying and roasting the grinding material to obtain the diamond grinding material plated with a BaO film; 3) mixing chromic nitrate with glacial acetic acid to prepare stable Cr2O3 sol, soaking the grinding material with Cr2O3, drying and roasting the grinding materials to obtain the diamond grinding material coated with a BaO / Cr2O3 film. According to the process, the surface of the diamond grinding material can be plated with a layer of compact composite film, so that harmful chemical reaction on the diamond grinding material and ceramic bond in a sintering process can be avoided, the wettability of the diamond grinding material and the ceramic bond can also be improved, the holding force on the diamond grinding material by the ceramic bond is increased, and the service life of a grinding tool is prolonged.

Description

technical field [0001] The invention relates to a diamond abrasive surface modification process, in particular to a process for coating a composite film on the diamond surface. Background technique [0002] Synthetic diamonds are mainly in the form of granules and powders. Usually, it is necessary to consolidate diamond abrasives with the aid of binders and other auxiliary materials to prepare abrasive tools, which are installed on various mechanical equipment to achieve grinding processes with different requirements. According to different types of bond, diamond abrasive tools are often divided into three categories, resin bond diamond abrasive tools, metal bond diamond abrasive tools and vitrified bond diamond abrasive tools. [0003] The diamond crystal structure is composed of carbon atoms with covalent bonds. Each carbon atom in the crystal structure is connected with four carbon atoms in the surrounding space in the form of saturated covalent bonds, forming a regular t...

Claims

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Application Information

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IPC IPC(8): C09C1/44C09C3/06C09K3/14
Inventor 蔡元沛龙慧玲梁安宁郭新玲宿恒
Owner GUILIN CHAMPION UNION DIAMOND CO LTD
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