Method for connecting superhard materials by silicification of phenolic resin

A superhard material and phenolic resin technology, which is applied in the field of phenolic resin siliconization to connect superhard materials, can solve the problems of low bonding strength and inability to apply high temperature environments, and achieve the effects of low cost, high bonding strength and simple process

Inactive Publication Date: 2015-07-29
ZHONGYUAN ENGINEERING COLLEGE
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing superhard material metal binder, which has low bonding strength and cannot be applied to high-temperature environments, and provides a binder that uses a mixture of phenolic resin and graphite or petroleum coke to form silicon carbide through silicification. Phase, method to achieve strong bonding of superhard materials

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Weigh 0.5g of cubic boron nitride, 0.5g of petroleum coke powder, mix evenly, add 0.3g of phenolic resin, mix evenly, after molding, dry at 100°C. Then move it into a vacuum sintering furnace covered with silicon powder and sinter at 1650°C for 1 hour, keep it warm under an argon atmosphere, and then raise the temperature to 1700°C and keep it under vacuum for 0.5 hours to obtain a superhard material product. The bending strength of the product is 350MPa.

Embodiment 2

[0013] Weigh 0.2g of diamond powder and 0.8g of petroleum coke powder, mix them evenly, add 0.4g of phenolic resin, mix them evenly, mold them, and dry them at 100°C. Then move it into a vacuum sintering furnace covered with silicon powder and sinter at 1650°C for 1.2 hours, keep it warm under an argon atmosphere, then raise the temperature to 1700°C and keep it under vacuum for 0.6 hours to obtain a superhard material product. The bending strength of the product is 550MPa.

Embodiment 3

[0015] A method for connecting superhard materials by silicification of phenolic resin, adding phenolic resin to cubic boron nitride, the amount of phenolic resin added is 2% of the mass of cubic boron nitride, molding or extruding after mixing, at 30 °C Drying under conditions to obtain the billet; move the billet into a vacuum sintering furnace covered with silicon powder, the quality of the silicon powder is 1% of the mass of cubic boron nitride, and sinter at 1450°C for 0.2 hours to carry out the silicification reaction, and Insulate at 1550°C for 0.2 hours, vacuum out excess silicon, and obtain a superhard material. The bending strength of the product is 400MPa.

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
flexural strengthaaaaaaaaaa
flexural strengthaaaaaaaaaa
flexural strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for connecting a superhard material by a phenolic resin silicification method. The method comprises the following steps of adding 2-40% by mass of phenolic resin into the superhard material, carrying out mixing, carrying out molding or extrusion forming, carrying out drying at a temperature of 30-200 DEG C to obtain a blank material, transferring the blank material into a vacuum sintering furnace paved with silicon powder, wherein the mass of the silicon powder is 1-30% that of the superhard material, carrying out sintering at a temperature of 1450-1750 DEG C for 0.2-2h so that a silicification reaction occurs, keeping the temperature of 1550-1850 DEG C for 0.2-1.5h, and carrying out vacuum removal of redundant silicon so that the superhard material is obtained. The method realizes connection of the superhard material by the phenolic resin silicification method. According to the method, a mixture of phenolic resin and graphite or petroleum coke is used as a binder for forming of superhard material particles, the superhard material particles are subjected to silicification in vacuum to form a silicon carbide phase so that superhard material firm-bonding is realized and thus the superhard material product having bending strength of 350-550MPa is obtained.

Description

technical field [0001] The invention relates to a method for connecting superhard materials by silicification of phenolic resin, and to the technical field of improving the connection strength and applicable temperature of superhard materials. Background technique [0002] General superhard materials refer to artificial diamond and artificial CBN. The simultaneous existence of these two materials plays a complementary role and can cover the processing of various new materials developed at present and in the future, which is extremely beneficial to the entire field of cutting processing. Natural single crystal diamond is the hardest substance in the world, so its performance as an abrasive and cutting tool is unparalleled. Take the diamond turning tool as an example, the radius of its cutting edge can be sharpened to the point that even scanning electron microscope, SEM, and It cannot be detected, and until now there is no material that can replace it. Using it for cutting a...

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): C04B35/52C04B35/5831C04B35/565C04B35/65
Inventor 张小立张旺玺刘英汤峰张瑞杰
Owner ZHONGYUAN ENGINEERING COLLEGE
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