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Array type ceramic preform sintering unit monomer and high-throughput pressureless sintering method

A prefabricated and arrayed technology, applied in the field of wear-resistant material preparation, can solve the problems of easy collapse of ceramic preforms, low high-temperature strength of preforms, poor applicability, etc., to achieve high-flux pressureless sintering and improve interface bonding strength. , the effect of saving the development cycle

Active Publication Date: 2021-09-07
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional methods of preparing ceramic preforms usually use organic binders for bonding, and then solidify to form preforms, which have the disadvantages of low high-temperature strength of preforms and easy collapse of ceramic preforms during pouring of molten metal.
And only using organic binders to solidify ceramic particles cannot improve the bonding characteristics of the interface between ceramic particles and iron substrates, such as wettability, interface bonding strength, etc.
[0003] In addition, the current methods for preparing various types of ceramic preforms have the disadvantages of long cycle time, high cost, and poor applicability, resulting in low production efficiency of ceramic preforms, which restricts the large-scale promotion and application of iron-based wear-resistant composite materials.

Method used

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  • Array type ceramic preform sintering unit monomer and high-throughput pressureless sintering method
  • Array type ceramic preform sintering unit monomer and high-throughput pressureless sintering method
  • Array type ceramic preform sintering unit monomer and high-throughput pressureless sintering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1) Soak ZTA ceramic particles in absolute alcohol and ultrasonically clean them for 20 minutes, and then dry them in a vacuum oven at 100°C; the selected ZTA ceramic particles range in size from 300 μm to 3 mm, with 200 μm as the interval, and 6 groups can be set Sample; Al in selected ZTA ceramic particles 2 o 3 The contents are respectively 20wt.%, 25wt.%, 30wt.%, 70wt.%, 75wt.%, 80wt.%, and 6 groups of samples can be set.

[0053] 2) Surface modification of ZTA ceramic particles was performed by a multi-arc ion coating apparatus, and three Ni 3 For Ti intermetallic compound target and α-Ti elemental target, the plating time is 3h.

[0054] 3) Combine the plated ZTA ceramic particles with Ni 3 Mix Ti powder and Ti powder evenly, the Ni used 3 Ti powder accounts for 12% of the mass fraction of ZTA ceramic particles; Ti powder accounts for 2% of the mass fraction of ZTA ceramic particles.

[0055] 4) Will figure 2 The shown ZTA ceramic particles + mixed powder ar...

Embodiment 2

[0060] 1) Soak the ZTA ceramic particles in absolute alcohol and ultrasonically clean them for 20 minutes, and then dry them in a vacuum oven at 100°C; the selected ZTA ceramic particles range in size from 1 mm to 2 mm; 2 o 3 The contents are respectively 20wt.%, 25wt.%, 30wt.%, 70wt.%, 75wt.%, 80wt.%, and 6 groups of samples can be set.

[0061] 2) Surface modification of ZTA ceramic particles was performed by a multi-arc ion coating apparatus, and three Ni 3 Ti intermetallic compound target and an α-Ti elemental target, the plating time is 2h;

[0062] 3) Mix the plated ZTA ceramic particles with Ni3Ti powder and Ti powder evenly, the Ni 3 Ti powder accounts for 10% of the mass fraction of ZTA ceramic particles; Ti powder accounts for 2% of the mass fraction of ZTA ceramic particles;

[0063] 4) Place ZTA ceramic particles + mixed powder together in figure 1 In the sintered unit of the ceramic preform shown, 3 parallel samples are set in each group;

[0064] 5) Place th...

Embodiment 3

[0068] 1) Soak the ZTA ceramic particles in absolute alcohol and ultrasonically clean them for 20 minutes, and then dry them in a vacuum oven at 100°C; the selected ZTA ceramic particles range in size from 300 μm to 1 mm; 2 o 3 The content is 80wt.%.

[0069] 2) Surface modification of ZTA ceramic particles was performed by a multi-arc ion coating apparatus, and three Ni 3 Ti intermetallic compound target and an α-Ti elemental target, the plating time is 2h;

[0070] 3) Combine the plated ZTA ceramic particles with Ni 3 Mix Ti powder and Ti powder evenly, the Ni used 3 Ti powder accounts for 14% of the mass fraction of ZTA ceramic particles; Ti powder accounts for 4% of the mass fraction of ZTA ceramic particles;

[0071] 4) Place ZTA ceramic particles + mixed powder together in figure 1 In the sintered unit of the ceramic preform shown, 3 parallel samples are set in each group;

[0072] 5) Place the sintered unit of the ceramic preform on the figure 2 The alumina tray...

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Abstract

The invention discloses an array type ceramic prefabricated body sintering unit monomer and a high-throughput pressureless sintering method. The ceramic particles are surface modified, mechanically mixed with alloy powder, and placed in a graphite mold for pre-pressing to form a sintered monomer. . Then it is sintered in a high-throughput vacuum pressureless sintering furnace. The present invention realizes the preparation of a single-batch, high-throughput ceramic particle preform by controlling the ceramic particle components, dimensions, surface modification method, alloy powder composition and addition amount in the sintering unit of the ceramic preform. The prepared prefabricated body can be widely used in the wear-resistant layer required for the preparation of wear-resistant composite materials such as grinding rollers, blow bars, hammer heads, bucket teeth, liners, impellers, and reamer heads. At the same time, it has the advantages of simple operation, low cost, The advantage of high efficiency.

Description

technical field [0001] The invention belongs to the technical field of preparation of wear-resistant materials, and in particular relates to a sintering unit monomer of an array type ceramic preform and a high-throughput pressureless sintering method. Background technique [0002] Iron-based composite materials are widely used in key sectors of the national economy such as metallurgy and mining, and ceramic prefabricated bodies are important reinforcements for iron-based composite materials. Conventional methods for preparing ceramic preforms usually use organic binders for bonding, and then solidify to form preforms, which have the disadvantages of low high-temperature strength of preforms and easy collapse of ceramic preforms during pouring of molten metal. Moreover, only the method of solidifying ceramic particles with an organic binder cannot improve the bonding characteristics of the interface between the ceramic particles and the iron matrix, such as wettability and in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/48C04B35/628C04B35/64
CPCC04B35/10C04B35/48C04B35/62842C04B35/64C04B2235/404C04B2235/668
Inventor 李烨飞李书文郑巧玲李海生牛瑞霞赵四勇
Owner XI AN JIAOTONG UNIV
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