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Preparation method of high toughness metal ceramic

A cermet, high toughness technology, applied in chemical instruments and methods, crystal growth, self-solids, etc., can solve the problems of low fracture toughness, unsatisfactory toughening effect, poor compatibility between toughening filler and technical matrix, etc. , to achieve the effect of improving toughening effect and improving compatibility

Active Publication Date: 2018-02-23
江苏英特耐机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a high-toughness cermet for the defect that the fracture toughness of the current cermet material is low, and the compatibility between the toughening filler and the technical matrix is ​​poor, resulting in the toughening effect not reaching the expectation. Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Mix the rice husk and 30% sodium hydroxide solution with a mass fraction of 1:3, heat and boil for 30 minutes, filter to obtain the filter residue after boiling, rinse 3 times with clean water, and then filter the filter residue with a mass fraction of 35%. Soak in sodium silicate solution for 10 hours to obtain the soaked filter residue; mix the soaked filter residue with 1mol / L hydrochloric acid at a mass ratio of 1:5, put it into an ultrasonic oscillator, and treat it with ultrasonic oscillation at a frequency of 30kHz for 20min, and the ultrasonic oscillation treatment is completed Afterwards, filter and separate to obtain the oscillating filter residue; put the oscillating filter residue into a carbonization furnace, and keep carbonization at a temperature of 700 °C for 1 hour under nitrogen protection to obtain a carbonized filter residue, and then put the carbonized filter residue into a vacuum sintering furnace, and use 50 mL / Inject argon gas into the furnace at...

example 2

[0027]According to the mass ratio of 1:3, the rice husk and the 30% sodium hydroxide solution were mixed, heated and boiled for 35 minutes, filtered to obtain the filter residue after boiling, rinsed with water for 4 times, and then the filter residue was mixed with a mass fraction of 35%. Soak in sodium silicate solution for 11 hours to obtain the soaked filter residue; mix the soaked filter residue with 1mol / L hydrochloric acid at a mass ratio of 1:5, put it into an ultrasonic oscillator, and treat it with ultrasonic oscillation at a frequency of 35kHz for 25min, and the ultrasonic oscillation treatment is completed Finally, filter and separate to obtain the oscillating filter residue; put the oscillating filter residue in a carbonization furnace, and keep carbonized at a temperature of 750°C for 1 hour under nitrogen protection to obtain a carbonized filter residue, and then put the carbonized filter residue into a vacuum sintering furnace, and use 50mL / Pass argon gas into ...

example 3

[0029] According to the mass ratio of 1:3, rice husk and 30% sodium hydroxide solution were mixed, heated and boiled for 40 minutes, filtered to obtain filter residue after boiling, rinsed with water for 5 times, and then filtered with 35% mass fraction Soak in sodium silicate solution for 12 hours to obtain the soaked filter residue; mix the soaked filter residue with 1mol / L hydrochloric acid at a mass ratio of 1:5, put it into an ultrasonic oscillator, and treat it with ultrasonic oscillation at a frequency of 40kHz for 30min, and the ultrasonic oscillation treatment is completed Finally, filter and separate to obtain the oscillating filter residue; put the oscillating filter residue in a carbonization furnace, and keep carbonization at a temperature of 800°C for 2 hours under the protection of nitrogen to obtain a carbonized filter residue, and then put the carbonized filter residue into a vacuum sintering furnace at a rate of 50 mL / Pass argon gas into the furnace at a rate...

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Abstract

The invention relates to the technical field of metal ceramic preparation, and in particular to a preparation method of high toughness metal ceramic. According to the preparation method of the high toughness metal ceramic, a rice husk pore is enlarged through soda boiling firstly; then a sodium silicate solution is immerged into rice husks; hydrochloric acid and sodium silicate react to generate gelatinous orthosilicic acid, and then the rice husks are carbonized and sintered to obtain porous silicon carbide whiskers with the high specific surface area; then the silicon carbide whiskers, lemonsmashing materials rich in organic carboxylic acid and grape skin rich in saccharomycetes are mixed and fermented; organic carboxylic acid is degraded and free carboxyl groups are generated under theeffect of microorganism; the free carboxyl groups are introduced to the surface of porous silicon carbide whiskers under the self-crosslinking effect of microorganism; nickel ions are chelated and absorbed by using the chelating property of carboxyl; at last, under the effect of high temperature sintering, the carboxyl is disintegrated and the nickel ions are exposed again; the nickel ions are reduced to nickel simple substance. By using the characteristic that the nickel simple substance has unlimited compatibility with metal molybdenum and metal titanium, the compatibility of the silicon carbide whiskers and a metal base body is improved; and the toughening effect of the silicon carbide is improved.

Description

technical field [0001] The invention relates to the technical field of cermet preparation, in particular to a preparation method of high-toughness cermet. Background technique [0002] Cermet has high hardness, wear resistance, red hardness, and extremely low friction coefficient, so it has attracted widespread attention at home and abroad, and is a kind of tool material with great potential. Fracture toughness is an important performance index of ceramic materials. The fracture toughness of cermets has been greatly improved compared with ordinary ceramics, but it is still insufficient. In order to further exert the excellent properties of cermets and expand their application range, it is necessary to further improve their fracture toughness. [0003] SiC whiskers have excellent characteristics in terms of elasticity, strength, heat resistance, and chemical stability. Adding them as reinforcing materials can improve the mechanical properties of cermet materials and show a g...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C29/10C30B29/62C30B29/36C30B1/10C30B33/00
CPCC22C1/051C22C29/067C22C29/10C30B1/10C30B29/36C30B29/62C30B33/00
Inventor 林茂兰
Owner 江苏英特耐机械制造有限公司
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