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Ceramic bonding agent, preparation method and application thereof and diamond grinding tool

A ceramic bond, diamond technology, applied in the manufacture of tools, abrasives, grinding devices, etc., can solve the problems of reducing the strength of diamond abrasive tools, affecting the microstructure of the bond, and short service life, and achieves improved service life and low price. , the effect of improving the reactivity

Active Publication Date: 2018-04-24
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vitrified bond is a mixture of multiple components, and its refractory temperature is high. If the sintering temperature is lowered, it is difficult to melt into a melt with uniform composition, which will affect the microstructure of the bond and reduce the strength of the diamond abrasive.
Therefore, the currently produced vitrified bonded diamond abrasive tools have low bending strength and short service life, which limits their application in industrial production, scientific research, aerospace and other fields.

Method used

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  • Ceramic bonding agent, preparation method and application thereof and diamond grinding tool
  • Ceramic bonding agent, preparation method and application thereof and diamond grinding tool

Examples

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preparation example Construction

[0022] A method for preparing a vitrified bond according to an embodiment includes the following steps S1-S3.

[0023] Step S1: providing raw materials, including zinc nitrate, lithium nitrate, aluminum nitrate, magnesium nitrate, zirconium nitrate, silica sol, organic fuel, dispersant and organic carbon source.

[0024] Zinc nitrate, lithium nitrate, aluminum nitrate, magnesium nitrate, zirconium nitrate and silica sol in the raw materials provide aggregate for the vitrified bond, and the metal nitrate in the raw material is used as an oxidant in the combustion reaction in step S2, and the organic fuel is used in the reaction As a reducing agent, once the raw material is ignited, it will trigger a violent redox reaction.

[0025] Part of the silica sol is simultaneously converted into silicon carbide nano-whiskers in step S3, English abbreviation: SiC nw , SiC nw play a reinforcing role. The dispersant plays a role in preventing metal nitrate and silica sol from precipitat...

Embodiment 1

[0055] Weigh 0.01mol of zinc nitrate, 0.04mol of lithium nitrate, 0.02mol of aluminum nitrate, 0.01mol of magnesium nitrate, 0.01mol of zirconium nitrate, 0.1mol of silica sol, 0.2mol of urea, 0.025mol of ammonium nitrate, 1.2g of polyacrylamide, and 0.01mol of glucose . The above raw materials are dissolved in water to obtain a mixed solution. After the mixed liquid is ultrasonically sprayed, a large number of fine and dispersed liquid droplets are obtained, and the combustion powder product is obtained after the liquid droplets initiate a combustion reaction at 700 °C in an argon atmosphere furnace. The combustion powder product is subjected to carbothermal reduction reaction at 1400°C and the flow rate of argon gas is 1L / min for 2 hours, so that part of the silicon oxide in the combustion powder product is transformed into SiC nw . The powder of the carbothermal reduction product was incubated in the air at 600 °C for 2 h to obtain the in situ SiC nw Doped vitrified powd...

Embodiment 2

[0057] Weigh 0.01mol of zinc nitrate, 0.042mol of lithium nitrate, 0.022mol of aluminum nitrate, 0.011mol of magnesium nitrate, 0.01mol of zirconium nitrate, 0.11mol of silica sol, 0.3mol of urea, 0.05mol of ammonium nitrate, 1.8g of polyacrylamide, and 0.012mol of glucose . Each of the above was dissolved in an aqueous solution to obtain a mixed solution. After the mixed liquid is ultrasonically sprayed, a large number of fine and dispersed liquid droplets are obtained, and the combustion powder product is obtained after the liquid droplets initiate a combustion reaction at 700 °C in an argon atmosphere furnace. Carbothermal reduction reaction of the combustion powder product at 1300°C and argon flow rate of 1L / min for 4 hours, so that part of the silicon oxide in the combustion powder product is transformed into SiC nw . The powder of the carbothermal reduction product was incubated in the air at 500 °C for 3 h to obtain the in situ SiC nw Doped vitrified powder. Then mi...

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Abstract

The invention relates to a ceramic bonding agent, a preparation method and application thereof and a diamond grinding tool. The preparation method comprises the following steps that raw materials areprovided, wherein the raw materials comprise zinc nitrate, lithium nitrate, aluminum nitrate, magnesium nitrate, zirconium oxide, silica sol, organic fuel, a dispersing agent and an organic carbon source; the raw materials are dissolved in a solvent to form a mixed solution, and then the mixed solution is atomized and subjected to a combustion reaction so as to obtain a combustion powder product;and heat preservation treatment is carried out on the combustion powder product in inert gas atmosphere, so that partial silicon oxide in the combustion powder product and carbon elementary substancesare subjected to a carbothermal reduction reaction and a silicon carbide nanometer crystal whisker is grown in situ, and then calcination treatment is carried out on the combustion powder product under oxidizing atmosphere, so that carbide except for the silicon carbide nanometer crystal whisker formed in the carbothermic reduction process is oxidized to obtain the ceramic bonding agent. The ceramic bonding agent prepared by the method is small in particle size, is uniformly mixed and uniformly doped with SiCnw, and is capable of reducing the sintering temperature of the diamond grinding tool, capable of improving bending strength of the diamond grinding tool and capable of prolonging the service life of the diamond grinding tool.

Description

technical field [0001] The invention relates to the technical field of manufacturing diamond abrasive tools, in particular to a vitrified bond, its preparation method, application and diamond abrasive tools. Background technique [0002] As an indispensable tool in mechanical processing, diamond abrasive tools have the characteristics of strong grinding force, low grinding temperature, small abrasive wear and long service life compared with ordinary corundum abrasive tools and silicon carbide abrasive tools. It is widely used in precision grinding of new engineering materials such as glass-ceramics, structural ceramics, and hard alloys, and has broad application prospects. [0003] Diamond abrasive tools are usually made of diamond abrasives and metal powder, resin powder, ceramics or electroplated metal as a binder. Vitrified bonded diamond abrasive tools are made by firmly bonding diamond abrasives at a certain sintering temperature with ceramic materials as the bonding a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/14B24D18/00
CPCB24D3/14B24D18/0009
Inventor 储爱民王志谦郭晨光王龙赵玉萍
Owner HUNAN UNIV OF SCI & TECH
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