A kind of single crystal diamond abrasive grain and preparation method thereof

A single crystal diamond and abrasive grain technology, which is applied in chemical instruments and methods, other chemical processes, polishing compositions containing abrasives, etc., can solve the problem of low self-sharpening, few contact points, and large concave on the surface of single crystal diamond particles. pits and other problems, to achieve the effect of shortening the process cycle, high self-sharpening, and saving raw materials

Active Publication Date: 2017-05-10
盘锦国瑞升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of single crystal diamond particle with high self-sharpening and its preparation method, to solve the problem of single crystal diamond by mixing and pressing metal powder and single crystal diamond powder with the same order of magnitude in the prior art. When the surface is metal-coated, it is difficult to form a complete and uniform metal coating layer on the surface of the single-crystal diamond particles, so that the surface of the final single-crystal diamond particles presents large pits, and there are few contact points during the grinding process. Low sharp technical issues

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  • A kind of single crystal diamond abrasive grain and preparation method thereof
  • A kind of single crystal diamond abrasive grain and preparation method thereof
  • A kind of single crystal diamond abrasive grain and preparation method thereof

Examples

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Embodiment 1

[0055] The present embodiment provides a kind of single crystal diamond abrasive grain, and its preparation method comprises the following steps:

[0056] 1) Take 4g of single crystal diamond with a particle size of 15-25μm and 16g of iron powder with a particle size of 1-3μm according to the proportion, put them into a closed reaction furnace and mix them evenly;

[0057] 2) press the mixture obtained in step 1) into a sheet with a thickness of 3.73mm at a pressure of 6Mpa with a press;

[0058] 3) Place the sheet obtained in step 2) into a vacuum furnace for heat treatment at 950° C. for 3 hours, wherein the vacuum degree in the vacuum furnace is 4 Pa; then cool naturally to room temperature; then break into small pieces;

[0059] 4) Put 10 g of the cooled and broken flakes obtained in step 3) into a sulfuric acid solution (formed from 120 ml of concentrated sulfuric acid and 500 ml of water) for 4 hours at a treatment temperature of 56° C.; become a powdery solid); incline...

Embodiment 2

[0062] The present embodiment provides a kind of single crystal diamond abrasive grain, and its preparation method comprises the following steps:

[0063] 1) Take 4g of single crystal diamond with a particle size of 5-10μm and 16g of iron powder with a particle size of 1-3μm according to the ratio, put them into a closed reaction furnace and mix them evenly;

[0064] 2) Press the mixture obtained in step 1) into a sheet with a thickness of 4.10mm at a pressure of 3Mpa with a press;

[0065] 3) Put the flakes obtained in step 2) into a vacuum furnace for heat treatment at 900° C. for 3 hours under the protection of a nitrogen atmosphere, wherein the vacuum degree in the vacuum furnace is 6 Pa; then cool naturally to room temperature; then break into small pieces;

[0066] 4) Put 10 g of the cooled and broken flakes obtained in step 3) into 600 ml of sulfuric acid solution with a mass concentration of 30% and treat them at room temperature for 3 hours; For the supernatant, tran...

Embodiment 3

[0069] The present embodiment provides a kind of single crystal diamond abrasive grain, and its preparation method comprises the following steps:

[0070] 1) According to the ratio, take 2g of single crystal diamond with a particle size of 20-40μm and 8g of iron powder with a particle size of 3-5μm, put them into a closed reaction furnace and mix them evenly;

[0071] 2) Press the mixture obtained in step 1) into a sheet with a thickness of 2.08mm at a pressure of 3Mpa with a press; the subsequent processing steps are the same as in Example 1.

[0072] The prepared single crystal diamond abrasive grain density of the present embodiment is 3.81g / cm 3 , the surface presents a unique rough appearance, and the median particle size (D50) is 28.54 μm; its SEM (scanning electron microscope) picture is as follows image 3 As shown, it can be seen that the surface of the single crystal diamond abrasive grain presents a unique rough shape, the surface is layered, uneven, and there will...

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Abstract

The invention relates to monocrystalline diamond grit. The monocrystalline diamond grit is prepared by, by weight, 1-4 parts of monocrystalline diamond and 6-9 parts of metal powder, and grain diameter ratio of the monocrystalline diamond to the metal powder is (2-40):(0.01-6). The preparation method includes: pressing the monocrystalline diamond and the metal powder after being mixed to be sheets in proper thickness under specific pressure; performing thermal treatment and subsequent treatment. The monocrystalline diamond grit presents a unique rough surface appearance, is high in roughness, large in grinding force and high in self-sharpening performance and presents many contact points and contact faces in the process of grinding. The preparation method is simple and convenient, process period is shortened, and the problem of environment pollution caused by the fact that conventional nickel plating methods generate a lot of heavy metal wastewater is avoided.

Description

technical field [0001] The invention relates to a single crystal diamond abrasive grain and a preparation method thereof, belonging to the technical field of grinding and polishing. Background technique [0002] Diamond is currently the hardest substance known in nature, its absolute hardness is 1000 times that of quartz, so diamond is widely used in the technology of processing and grinding various hard materials due to its unparalleled high hardness and excellent mechanical and physical properties field. Diamond micropowder is a fine superabrasive. Usually submillimeter-sized diamond single crystal is used as raw material, and after crushing, shaping and a series of physical and chemical treatments, abrasives with regular particle shape and a certain particle size distribution are produced. It is the most advanced and precise superabrasive in the world, widely used in various fields such as machinery, electronics, metallurgy, construction and national defense. It is oft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/14C09G1/02
Inventor 王院卫楚亚卿张航海
Owner 盘锦国瑞升科技有限公司
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