Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Polycrystalline diamond compact and manufacturing method thereof

A technology of polycrystalline diamond and composite sheet, which is applied in metal material coating process, gaseous chemical plating, coating, etc., which can solve the problems of poor wear resistance of composite sheet, larger Co volume, and increased distortion energy. , to achieve the effect of prolonging the service life, increasing the total surface area, and enhancing the anti-coating peeling ability

Active Publication Date: 2016-02-24
FUNIK ULTRAHARD MATERIAL
View PDF8 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still has the following shortcomings: that is, because Co still exists inside the polycrystalline diamond compact, and the CVD temperature is generally 800-1000°C, when the temperature is higher than 400°C, Co begins to expand between the diamond grains, and the volume of Co becomes larger, the thermal stress leads to an increase in the distortion energy of the contact part with the diamond, and a large number of thermal defects appear inside the polycrystalline diamond, resulting in a decrease in performance
[0006] There are also studies that point out that the polycrystalline diamond compact uses a Co-free binder. Although the influence of residual Co on the thermal stability of the polycrystalline diamond compact is excluded, the polycrystalline diamond compact is not DD bonded. The wear resistance of the composite sheet becomes poor

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
  • Polycrystalline diamond compact and manufacturing method thereof
  • Polycrystalline diamond compact and manufacturing method thereof
  • Polycrystalline diamond compact and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A polycrystalline diamond composite sheet, such as figure 1 with Figure 4 As shown, it includes a cylindrical composite sheet substrate and a working end surface 3. The composite sheet substrate includes a cemented carbide base layer 1 and a polycrystalline diamond layer 2 covered on the upper surface of the cemented carbide base layer 1, a cemented carbide base layer 1 and a polycrystalline diamond layer 2 It is sintered into a whole through high temperature and high pressure; the working end face 3 is located on the upper end face of the polycrystalline diamond layer 2, and the working end face 3 is coated with a multilayer nano-diamond layer 4, and the total thickness of the multilayer nano-diamond layer 4 is 6 μm.

[0040] Each nano-diamond layer 4 includes a nanocrystalline layer 5 with an average grain size of 20 nm and a nanocrystalline layer 6 with an average grain size of 60 nm. The thickness of each nanocrystalline layer is 0.3um.

[0041] The preparation method i...

Embodiment 2

[0052] Such as figure 2 As shown, in this embodiment, the working end surface of the composite sheet substrate and the side surface of the polycrystalline diamond layer are both coated with multiple nano-diamond layers. The total thickness of the multiple nano-diamond layers 4 is 16 μm, and each nano-diamond layer 4 It includes two nanocrystalline layers with an average grain size of 40nm and 60nm respectively. The thickness of each nanocrystalline layer is 0.4um. The rest is the same as in Example 1.

[0053] The preparation method includes the following steps:

[0054] (1) Preparation of the composite sheet substrate: mix the diamond powder and the binder, and sinter with the hard aluminum alloy substrate at 5.5GPa, 1400°C for 8 minutes to obtain the composite sheet substrate blank. The composite sheet substrate blank is processed by grinding and finishing. After treatment, a composite sheet substrate blank with a polycrystalline diamond layer on the upper surface of the cemen...

Embodiment 3

[0064] In this embodiment, such as image 3 As shown, the working end surface of the polycrystalline diamond layer and the side surface of the composite sheet substrate are both coated with a multilayer nano-diamond layer 4, and the total thickness of the multilayer nano-diamond layer 4 is 20 μm. Each nano-diamond layer 4 includes two nano-crystalline layers with an average crystal grain size of 40 nm and 80 nm, respectively. The rest is the same as in Example 1.

[0065] The preparation method includes the following steps:

[0066] (1) Preparation of composite sheet: Mix diamond powder and binder, and sinter with hard aluminum alloy matrix at 5.5GPa, 1550℃ for 6min to obtain the composite sheet base blank, and the composite sheet base blank is processed by grinding and finishing. Afterwards, a composite sheet substrate blank with the upper surface of the cemented carbide base layer covered with a polycrystalline diamond layer is obtained. The composite sheet substrate blank is pr...

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
Total thicknessaaaaaaaaaa
Average grain sizeaaaaaaaaaa
Average grain sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a polycrystalline diamond compact and a manufacturing method thereof. The polycrystalline diamond compact comprises a cylindrical compact base body and a working end face. The compact base body comprises a hard alloy base layer and a polycrystalline diamond layer covering the upper surface of the hard alloy base layer. The working end face is located on the upper end face of the polycrystalline diamond layer and provided with multiple nanodiamond layers. Each nanodiamond layer comprises two nanocrystalline layers of different average grain sizes. The manufacturing method of the polycrystalline diamond compact includes the steps of firstly, compact base body manufacturing, secondly pretreatment, thirdly CVD film coating and fourthly nanodiamond layer surface polishing after which the compact is obtained. The outer layer of the compact is coated with the nanodiamond layers, the abrasion resistance, impact resistance and toughness of the polycrystalline diamond compact are improved, and the service life of the compact is prolonged; and the polycrystalline diamond compact manufactured through the method is good in abrasion resistance, high-temperature resistance and impact resistance.

Description

technical field [0001] The invention specifically relates to a polycrystalline diamond composite sheet and a preparation method thereof. Background technique [0002] Polycrystalline Diamond Compact (Polycrystalline Diamond Compact, hereinafter referred to as PDC composite sheet) is a composite material composed of a polycrystalline diamond layer covered on the surface of a cemented carbide substrate. It has the advantages of high wear resistance of polycrystalline diamond layer and toughness and weldability of cemented carbide, so it becomes an efficient cutting tool material and excellent wear-resistant material, and is widely used in petroleum and geological drilling and machinery processing and other fields. [0003] In practical applications, since the catalyst of polycrystalline diamond compact (PDC) contains Co, Ni, Fe, etc., the presence of Co makes the composite sheet unable to withstand the high temperature of 700 ° C under normal pressure, and Co exists in the di...

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
IPC IPC(8): C23C16/27C23C16/46
CPCC23C16/271
Inventor 李翠
Owner FUNIK ULTRAHARD MATERIAL
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com