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Method for increasing surface roughness of man-made diamond single crystal

A surface roughness and artificial diamond technology, applied in the field of abrasives and grinding, can solve the problems of self-sharpening of diamond tools, inability to apply diamond tools, and grinding wheels without edges, etc., to improve grinding efficiency and processing quality, Improves the effect of easy shedding and prolongs the service life

Inactive Publication Date: 2015-04-22
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is reflected in: the self-sharpening of diamond tools will be affected; the formula of the bonding agent needs to be adjusted, otherwise the grinding wheel will not be edged, blocked, or burn the workpiece; the surface coating and the coating layer are not bonded firmly to the diamond, and it is easy to delaminate ; In addition, it is not suitable for all types of bonded diamond tools

Method used

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  • Method for increasing surface roughness of man-made diamond single crystal
  • Method for increasing surface roughness of man-made diamond single crystal
  • Method for increasing surface roughness of man-made diamond single crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Cobalt oxalate powder is evenly wrapped on the diamond surface according to the mass ratio of 1:1, so that the two are in full contact.

[0044] The coated diamond is then loaded into a ceramic crucible or boat and placed in a tube furnace. Adjust the sintering process curve, the heating rate is 3°C / min, the final sintering temperature is 800°C, and the holding time is 1h. During the heating process, nitrogen gas is introduced when the temperature rises to 200 °C, hydrogen gas is introduced when the temperature is 500 °C, hydrogen gas is stopped when the temperature drops to 500 °C during the cooling process, nitrogen gas is stopped at 200 °C, and the flow rate of hydrogen gas is adjusted to 1 L / min. The flow rate of nitrogen is 2.7L / min.

[0045] Finally, carry out pickling operation, prepare aqua regia with the ratio of nitric acid: hydrochloric acid = 1:3, and then carry out acid treatment on the corroded diamond, and then wash it with water until it is neutral, and...

Embodiment 2

[0047] Wrap the iron oxalate powder on the surface of the diamond according to the mass ratio of 1:1, so that the two can fully contact.

[0048] The coated diamond is then loaded into a ceramic crucible or boat and placed in a tube furnace. Adjust the sintering process curve, the heating rate is 3°C / min, the final sintering temperature is 800°C, and the holding time is 1h. In the process of heating up, nitrogen is introduced when the temperature rises to 200°C, hydrogen is introduced at 500°C, hydrogen is stopped when the temperature drops to 500°C during the cooling process, nitrogen is stopped at 200°C, and the flow rate of hydrogen is adjusted to 1L / min. The flow rate is 2.7L / min.

[0049] Finally, carry out pickling operation, prepare aqua regia with the ratio of nitric acid: hydrochloric acid = 1:3, then carry out acid treatment on the corroded diamond, and then wash it with water until it is neutral, and dry it.

Embodiment 3

[0051] Wrap the iron oxalate powder on the surface of the diamond according to the mass ratio of 1:1, so that the two can fully contact.

[0052] The coated diamond is then loaded into a ceramic crucible or boat and placed in a tube furnace. Adjust the sintering process curve, the heating rate is 3°C / min, the final sintering temperature is 650°C, and the holding time is 1h. In the process of heating up, nitrogen is introduced when the temperature rises to 200°C, hydrogen is introduced at 500°C, hydrogen is stopped when the temperature drops to 500°C during the cooling process, nitrogen is stopped at 200°C, and the flow rate of hydrogen is adjusted to 1L / min. The flow rate is 2.7L / min.

[0053] Finally, carry out pickling operation, prepare aqua regia with the ratio of nitric acid: hydrochloric acid = 1:3, then carry out acid treatment on the corroded diamond, and then wash it with water until it is neutral, and dry it.

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Abstract

The invention discloses a method for increasing surface roughness of a man-made diamond single crystal. The method comprises the following steps: packaging a diamond with oxalate, putting the packaged diamond in a reducing atmosphere, heating and sintering, pickling, washing and drying sintering products, thereby obtaining diamond with improved surface roughness. The method is used for processing the diamond surface, so that the uniformly-distributed corrosion morphology is shown in the surface, the surface roughness of the diamond is increased, the specific surface area and the surface energy of the diamond are improved, the mechanical holding force of a binder in a diamond tool on the diamond surface is strengthened, the condition that the diamond is easy to separate in a practical grinding process is improved, and the service life of the diamond tool is prolonged. The method has the advantages of being low in equipment requirement, simple in operation process, economical and practical, obvious in effect, and the like.

Description

technical field [0001] The invention relates to a method for improving the surface roughness of an artificial diamond single crystal, belonging to the technical field of abrasives and grinding tools. Background technique [0002] Due to a series of excellent physical and chemical properties such as high hardness, high strength, high wear resistance, and small linear expansion coefficient, diamond, as an abrasive, is increasingly widely used in the field of grinding. However, in the actual use process, it is prone to the problem that the diamond will fall off seriously if it is not fully utilized, reducing the utilization rate of the diamond. In this regard, the traditional method adopts the surface plating of Ni, Ti, Cu and other metals and their alloys, and the surface coating of TiO 2 , AlO 3 etc., or modify the diamond surface by treating with silane coupling agent. But these methods still have some limitations. It is reflected in: the self-sharpening of diamond tools...

Claims

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Application Information

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IPC IPC(8): C04B41/00
Inventor 万隆周肖璇陈静王俊沙张磊欣
Owner HUNAN UNIV
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