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Fe-Cr-Ni-Ti micropowder coated honeycomb ZTA ceramic preform as well as preparation and application thereof

A fe-cr-ni-ti, honeycomb technology, used in ceramic products, applications, other household appliances, etc., can solve the problems of ceramic preform size limit, composite interface tearing, non-wetting, etc., to improve Interfacial bonding properties, improving metallurgical bonding strength, and improving wettability

Active Publication Date: 2018-12-21
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor wettability between the composite metal or metal compound and the ceramic reinforcement, or no wetting at all, the interface bonding quality between the metal and the ceramic in the prepared composite material is poor, and tearing often occurs at the composite interface In addition, the bonding strength between ceramic particles is the decisive factor for the resistance to thermal shock and thermal shock of the metal solution. At present, the ceramic particles are mainly sintered by pressureless sintering technology near the melting point of the metal powder, and finally the bonding between the particles Molding, the process of this method is relatively complicated, it is difficult to guarantee the quality of the molding, and there are certain restrictions on the size and specifications of the ceramic preform

Method used

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  • Fe-Cr-Ni-Ti micropowder coated honeycomb ZTA ceramic preform as well as preparation and application thereof
  • Fe-Cr-Ni-Ti micropowder coated honeycomb ZTA ceramic preform as well as preparation and application thereof
  • Fe-Cr-Ni-Ti micropowder coated honeycomb ZTA ceramic preform as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1) Take Fe, Cr, Ni, Ti powder with a purity of about 99.99%, particle size less than 200 mesh, Fe: 75%, Cr: 10.8%, Ni: 13.3%, Ti: 0.90% by weight, and alloy Chemical treatment, main mechanical alloying parameters: ball diameter: 5mm, ball to material ratio 10:1, speed 400r / min, ball milling time 48h. Usually the whole process of ball milling and powder filling is carried out under the environment of inert gas;

[0050] 2) In a 30mm×20mm×10mm cavity and a through Φ10mm cylindrical mold, add the Fe, Cr, Ni, Ti micropowder and ZTA ceramic particles obtained in step (1), then add water glass, and then add 10~ 12 purpose paraffin, wherein choose Fe, Cr, Ni, Ti mixed micropowder 2.4g, ZTA ceramic particles (ZrO 2 20wt.%, Al 2 o 3 Accounting for 80wt.%) 30g, the amount of water glass is 0.12g, 10-12 mesh paraffin wax particles are added as 0.65g as a pore-forming agent, the four are evenly mixed and processed, and the whole process is carried out in a protective atmosphere....

Embodiment 2

[0056] 1) Take Fe, Cr, Ni, Ti powder with a purity of about 99.99%, particle size less than 200 mesh, Fe: 78%, Cr: 10.0%, Ni: 11.0%, Ti: 1.0% by weight, and alloy Chemical treatment, main mechanical alloying parameters: ball diameter: 5mm, ball to material ratio 10:1, speed 400r / min, ball milling time 48h. Usually the whole process of ball milling and powder filling is carried out under the environment of inert gas;

[0057] 2) In a 30mm×20mm×10mm cavity and a through Φ10mm cylindrical mold, first add the Fe, Cr, Ni, Ti micropowder and ZTA ceramic particles obtained in step (1), then add water glass, and then add 10 ~12 purpose paraffin wax, wherein choose Fe, Cr, Ni, Ti mixed micropowder 2.4g, ZTA ceramic particles (ZrO 2 20wt.%, Al 2 o 3 Accounting for 80wt.%) 30g, the amount of water glass is 0.12g, 0.65g of 10-12 mesh paraffin particles are added as a pore-forming agent, and the four are uniformly mixed and processed, and the whole process is carried out in a protective...

Embodiment 3

[0062] 1) Take Fe, Cr, Ni, Ti powder with a purity of about 99.99%, particle size less than 200 mesh, Fe: 78.3%, Cr: 10%, Ni: 10.5%, Ti: 1.2% by weight, and mix the powder for alloying Chemical treatment, main mechanical alloying parameters: ball diameter: 5mm, ball to material ratio 10:1, speed 400r / min, ball milling time 48h. Usually the whole process of ball milling and powder filling is carried out under the environment of inert gas;

[0063] 2) In a 30mm×20mm×10mm cavity and a through Φ10mm cylindrical mold, add the Fe, Cr, Ni, Ti micropowder and ZTA ceramic particles obtained in step (1), then add water glass, and then add 10~ 12 purpose paraffin, wherein choose Fe, Cr, Ni, Ti mixed micropowder 2.4g, ZTA ceramic particles (ZrO 2 20wt.%, Al 2 o 3 Accounting for 80wt.%) 30g, the amount of water glass is 0.12g, 0.65g of 10-12 mesh paraffin particles are added as a pore-forming agent, the four are uniformly mixed, and the whole process is carried out in a protective atmos...

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Abstract

The invention belongs to the field of material processing, and discloses a Fe-Cr-Ni-Ti micropowder coated honeycomb ZTA ceramic preform as well as a preparation method and application thereof. Fe, Crand Ni are main elements in chromium-based cast iron and high-manganese steel; after the Fe, the Cr and the Ni are subjected to alloying treatment together with Ti powder, the reduction of the meltingtemperature of pure Ti powder is facilitated, and molten Ti is more easily formed in a liquid casting process at the high temperature of 1500+ / -20 DEG C; by means of a diffusion reaction of Ti and the oxygen in ZTA ceramic, a metal ceramic bonding interface with a higher bonding strength is realized. In addition, water glass reacts with CO2 so as to form silicic acid with certain connection strength, so that the bonding between ZTA ceramic particles and the shaping of the preform are promoted, and the resistance to scouring of poured liquid metal of the preform is improved. In addition, paraffin is used as a pore-forming agent, so that the uniform distribution and communication of holes in the preform can be facilitated. Therefore, the Fe-Cr-Ni-Ti micropowder coated honeycomb ZTA ceramicpreform can be well applied to preparation of metal-based composite materials.

Description

technical field [0001] The invention belongs to the field of material processing, and in particular relates to a honeycomb ZTA ceramic prefabricated body coated with Fe-Cr-Ni-Ti micropowder and its preparation method and application. Background technique [0002] Ceramic reinforced metal matrix composites, with high strength, heat resistance, and excellent composite properties of metal and ceramics, have attracted more and more attention, especially in the field of wear reduction and wear resistance. The application prospect is huge. Usually, the process of preparing ZTA ceramic / high chromium cast iron composite mainly includes two processes: first, the preparation of ZTA ceramic preform; secondly, the pressureless infiltration process of high chromium cast iron ZTA ceramic preform in molten state. The prefabricated body is the basis for the preparation of composite materials and is also the decisive factor for the performance of composite materials. Due to the poor wettab...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/10C04B35/622C04B35/626B22F1/02C22C38/50
CPCC22C38/50C04B35/10C04B35/622C04B35/62605C04B38/068C04B2235/3427C04B2235/3244B22F1/16C04B38/0074
Inventor 涂小慧李卫郑宝超徐方伟林怀俊张鹏
Owner JINAN UNIVERSITY
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