A composite treatment method for diamond surface metallization

A technology for surface metal and composite treatment, applied in the field of diamond particle surface modification, can solve the problems of diamond surface metallization that have not been publicly reported, and achieve the effects of shortening treatment time, simple equipment and low deposition temperature

Inactive Publication Date: 2015-11-04
SOUTHWEST PETROLEUM UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, microwave energy is widely used in the heat treatment, synthesis and sintering research of inorganic materials, organic polymers and metal materials, but there is no public report on the use of microwave heating for diamond surface metallization

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A composite treatment method for diamond surface metallization
  • A composite treatment method for diamond surface metallization
  • A composite treatment method for diamond surface metallization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The Ni-Cr-P coating is prepared on the diamond surface by chemical plating, and the diamond particles are 150-180 μm. figure 1 Its stereomicroscopic appearance. Bath composition includes NiSO 4 ·7H 2 O 10-20g / L, CrCl 3 ·6H 2 O 10-15g / L, NaH 2 PO 2 ·H 2 O 35-45g / L, C 6 H 8 O 7 ·H 2 O 30-35g / L, C 3 H 6 O 3 10-20g / L, NH 4 Cl 30-50g / L, use ammonia water and 30% acetic acid to adjust the pH value of the plating solution to 7-9, introduce diamond particles into the plating solution, apply ultrasonic plating with mechanical stirring, the temperature of the water bath is 85 ° C, the time is 1 hour, take out after cooling Electroless plated diamond particles, washed with water and dried. Mix the diamond particles with the zirconia ball mill to make the diamond particles completely embedded, then place the mixture in a corundum crucible with a capacity of 500ml to cover, and then place it in a vacuum microwave heating furnace for 20 minutes, and the microwave powe...

Embodiment 2

[0024] The Ni-Cr-W-P coating is prepared on the diamond surface by electroless plating, the diamond particles are 150-180 μm, and the composition of plating solution 1 includes NiSO 4 ·7H 2 O 20-30g / L, Na 2 WO 4 ·2H 2 O 50-70g / L, NaH 2 PO 2 ·H 2 O 15-25g / L, Na 3 C 6 H 5 O 7 ·H 2 O 100-110g / L, (NH 4 ) 2 SO 4 30-35g / L, pH value is 8.8-9.2, temperature is 90℃; the composition of bath 2 is CrF 3 10-20 g / L, NaH 2 PO 2 ·H 2 O 5-10 g / L, Na 3 C 6 H 5 O 7 ·H 2 O 5-10g / L, CrCl 3 ·6H 2O 1-5 g / L, pH 8-10, mix the two plating solutions and stir well, and place in a water bath thermostat with a temperature of 90 °C. The diamond particles were introduced into the plating solution, plated by ultrasonic and mechanical stirring, and the temperature of the water bath was kept at 90° C. for 1 hour. After cooling, the electroless diamond particles were taken out, washed with water and dried. Mix the diamond particles with the zirconia ball mill to make the diamond partic...

Embodiment 3

[0026] The Ni-P coating is prepared on the diamond surface by chemical plating, the diamond particles are 150-180μm, and the composition of the plating solution includes NiSO 4 ·6H 2 O 20-30g / L, NaAc 40-50 g / L, NaH 2 PO 2 ·H 2 O 30-40 g / L, CH 3 COONH 4 10-20 g / L, a small amount of sulfuric acid, adjust the pH value of the plating solution to 5-6, introduce the diamond particles into the plating solution, apply ultrasonic and mechanical stirring for plating, the water bath temperature is 80 °C, and the time is 1 hour. After cooling, take out the electroless diamond plating Granules, washed with water and dried. Mix the diamond particles with the zirconia ball mill to make the diamond particles completely embedded, then place the mixture in a corundum crucible with a capacity of 500ml to cover, and then place it in a vacuum microwave heating furnace for 20 minutes, with a microwave power of 1.5 KW, sintering temperature 800℃, vacuum degree 1.3×10 -3 Pa, and finally coole...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a composite processing method for realizing metallization of the surfaces of diamonds. The method comprises the following steps: performing chemical plating processing on diamond particles to enable the surfaces of the diamond particles to be uniformly coated with chemical plating layers; performing metallized processing on the surfaces of the diamond particles, packing a wave-absorbing material and the diamond particles subjected to chemical plating into a ball mill jar for realizing uniform material mixing, filling a corundum crucible with the mixture, sealing the surface of the corundum crucible and placing the corundum crucible in a vacuum micro-wave heating oven, and slowly rotating the oven for heating and insulating, wherein the heating temperature is 750-900 DEG C, the heating and insulating process takes 10-30 minutes, and the vacuity is 1.3*10<-3>Pa; separating the diamond particles from the wave-absorbing material. According to the invention, the chemical plating technology and the vacuum microwave quick heating technology are combined, so that the deposition temperature of the chemical plating becomes low, and obtained plating can be more uniform and compact; heat energy can be more effectively utilized through vacuum micro-wave heating; moreover, metallurgy diffusion reaction rate is promoted, the processing time is shortened, and graphitization of the diamonds can be well prevented in a vacuum processing environment.

Description

technical field [0001] The invention relates to a treatment method for surface metallization of polycrystalline diamond particles in the field of surface modification of diamond particles. Background technique [0002] For metal bond diamond tools, the physical and chemical compatibility of the matrix and diamond is one of the key factors to achieve the performance of the tool. Diamond tools are mostly prepared by sintering in vacuum or protective atmosphere, the purpose of which is to prevent premature graphitization of diamond in the presence of an oxidizing atmosphere. However, when the diamond and cemented carbide are mixed and welded on the steel tooth oil drill bit by surfacing welding technology, because it is carried out in the air environment, the flame temperature is high, which will easily lead to the graphitization of the diamond part and reduce its compressive strength. Greatly affect the use of diamond tools. Therefore, preventing diamond at high temperature ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/32C23C18/50
Inventor 张进薛屺晋勇黄敏李松霞
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap