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High-throughput preparation method of loose ceramic preform

A prefabricated, high-throughput technology, applied in the field of wear-resistant material preparation, can solve the problems of limited bonding ability between the composite layer and the substrate, the peeling off of the composite layer along the bonding surface, and affecting the popularization and application of composite materials.

Active Publication Date: 2021-04-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The composite layer of the traditional surface composite material is distributed on the surface of the component in the form of an entire layer. This kind of surface partial composite material still has deficiencies in the service process: if the composite layer contains a large amount of ceramic particles, the hardness is extremely high, which can significantly improve the wear resistance of the composite material. The higher the content of ceramic particles, the greater the brittleness, which may break or peel off in advance during service, which seriously affects the popularization and application of this type of composite material; The shrinkage of the liquid metal during the infiltration process and the mismatch between the physical properties of the reinforcing phase and the base metal material will generate a large stress, which will easily cause the peeling of the composite layer along the joint surface under high impact loads, and the composite layer cannot be fully utilized. High wear resistance
[0003] ZTA particle-reinforced steel-based composite materials still have high manufacturing costs, complex processes, difficult control, high brittleness of the surface layer, and limited bonding ability between the composite layer and the matrix, so the current application range is still very limited.

Method used

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  • High-throughput preparation method of loose ceramic preform

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preparation example Construction

[0035] A high-throughput preparation method of a loose-packed ceramic preform of the present invention comprises the following steps:

[0036] S1. Soak the ZTA ceramic particles in ethanol for 10-30 minutes, ultrasonically clean them for 5-15 minutes, then wash them with deionized water, and rinse them with alcohol, and dry them in an electric constant temperature blast drying oven with a controlled drying temperature of 100-110°C. 1~1.5h standby;

[0037] S2, mix the active element titanium and the inorganic salt according to the mass ratio of 1:(6~7.5), add the ZTA particles after the drying treatment in step S1 and stir evenly, the ZTA particles account for 80% of the mass fraction, and then perform heat preservation annealing treatment, Under the conditions of high temperature and molten salt, titanium is deposited on the surface of the particles, and the process of salt bath titanium plating is completed. After holding the temperature for 45-135 minutes at 850°C, take it ...

Embodiment 1

[0051] 1) Ultrasonic cleaning of ZTA particles for 14 minutes, followed by deionized water cleaning, and alcohol rinsing, and drying in an electric heating constant temperature blast drying oven;

[0052] 2) Quantitatively weigh 60g of potassium chloride, 40g of sodium chloride, 42g of calcium chloride, 23g of titanium powder, and 122g of cleaned and dried ZTA particles, mix them evenly, put them into a crucible, place them in a heat treatment furnace, and heat them at 850°C , after 45min heat preservation and annealing treatment, take it out, wash it with deionized water, rinse it with alcohol and then dry it. It is observed that the titanium layer is 4 μm;

[0053] 3) Mix 47ml of 37% hydrochloric acid and 47ml of deionized water to form an etching solution, heat to 65°C, place the particles in step 2 in the etching solution, and keep warm for 5 minutes;

[0054] 4) Take 680ml / L ethylene glycol, 32g / L ammonium bifluoride, 18g / L nickel chloride, 45g / L boric acid, 170ml / L glaci...

Embodiment 2

[0059] 1) Ultrasonic cleaning of ZTA particles for 14 minutes, followed by deionized water cleaning, and alcohol rinsing, and drying in an electric heating constant temperature blast drying oven;

[0060] 2) Quantitatively weigh 68g of potassium chloride, 54g of sodium chloride, 49g of calcium chloride, 23g of titanium powder, and 115g of washed and dried ZTA particles, mix them evenly, put them into a crucible, place them in a heat treatment furnace, and heat them at 860°C , after 65min heat preservation and annealing treatment, take it out, wash it with deionized water, rinse it with alcohol and then dry it. It is observed that the titanium layer is 6 μm;

[0061] 3) Mix 52ml of 37% hydrochloric acid and 52ml of deionized water to form an etching solution, heat to 68°C, place the particles in step 2 in the etching solution, and keep warm for 6 minutes;

[0062] 4) Take 690ml / L ethylene glycol, 34g / L ammonium bifluoride, 19g / L nickel chloride, 48g / L boric acid, 175ml / L glacia...

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Abstract

The invention discloses a high-throughput preparation method of loose ceramic preform. The method comprises the following steps: mixing high-purity titanium powder with inorganic salt, adding ZTA ceramic particles, and carrying out heat preservation annealing treatment to obtain ZTA particles with the surfaces plated with titanium layers; immersing the ZTA particles plated with the titanium layers into an etching solution for acid pickling; then putting the ZTA particles into a nickel dipping solution to be heated and carrying out heat preservation treatment; and putting the ZTA particles into a chemical plating solution, carrying out magnetic stirring to obtain ZTA particles pre-plated with Ti-Ni layers, mixing the ZTA particles pre-plated with the Ti-Ni layers with Ni-Ti alloy powder, and carrying out vacuum sintering to obtain the loose ceramic preform of a honeycomb structure. According to the method, salt bath titanium plating and chemical nickel plating are used, the situation that electroplating pollutes the environment is avoided, the production efficiency is greatly improved through the high-flux technology, and the combination of particles and a base body is improved through the double-plating-layer structure.

Description

technical field [0001] The invention belongs to the technical field of preparation of wear-resistant materials, and in particular relates to a high-throughput preparation method of loose-packed ceramic preforms. Background technique [0002] The composite layer of the traditional surface composite material is distributed on the surface of the component in the form of an entire layer. This kind of surface partial composite material still has deficiencies in the service process: if the composite layer contains a large amount of ceramic particles, the hardness is extremely high, which can significantly improve the wear resistance of the composite material. The higher the content of ceramic particles, the greater the brittleness, which may break or peel off early in the service process, seriously affecting the popularization and application of this type of composite material; During the infiltration process, the shrinkage of the liquid metal and the mismatch between the physical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/02C23C24/08C23C18/36B22F3/11
CPCC23C28/023C23C24/087C23C18/36B22F3/11
Inventor 郑巧玲赵子龙李烨飞张创举牛瑞霞
Owner XI AN JIAOTONG UNIV