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Preparation method of zirconium tungstate-containing aluminum-based composite material with high comprehensive performance

A technology of aluminum-based composite materials and comprehensive performance, which is applied in the field of preparation of aluminum-based composite materials, can solve the problems of large thermal expansion coefficient and low strength of composite materials, and achieve the goal of increasing strength, improving comprehensive performance, and facilitating industrial production and application Effect

Active Publication Date: 2022-03-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is in order to solve existing ZrW 2 o 8 / Al composites have low strength, and the γ-ZrW 2 o 8 Too much content leads to the problem of large thermal expansion coefficient of composite materials, and a high comprehensive performance ZrW-containing 2 o 8 Preparation method of aluminum matrix composite material

Method used

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  • Preparation method of zirconium tungstate-containing aluminum-based composite material with high comprehensive performance
  • Preparation method of zirconium tungstate-containing aluminum-based composite material with high comprehensive performance
  • Preparation method of zirconium tungstate-containing aluminum-based composite material with high comprehensive performance

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specific Embodiment approach 1

[0040] Specific implementation mode one: ZrW containing ZrW with high comprehensive performance in this implementation mode 2 o 8 The preparation method of the aluminum matrix composite material is carried out according to the following steps:

[0041] 1. Weighing:

[0042] Weigh ZrW 2 o 8 powder, high-strength ceramic powder and aluminum matrix as raw materials;

[0043] The volume fraction of the aluminum matrix in the raw material is 5-40%, the volume fraction of the high-strength ceramic powder is 0.1-15%, and the ZrW 2 o 8 Powder is the balance;

[0044] The average particle size of the high-strength ceramic powder is 0.5-15 μm; ZrW 2 o 8 The powder consists of 2-5 kinds of ZrW with different average particle sizes 2 o 8 Powder mixed, ZrW 2 o 8 The average particle size of powder is 0.5~200μm;

[0045] The high-strength ceramic powder is SiC powder, B 4 C powder, Al 2 o 3 One or a combination of several powders;

[0046] 2. Preparation of reinforcement pref...

specific Embodiment approach 2

[0064] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the aluminum substrate in step 1 is pure aluminum or aluminum alloy; the aluminum alloy is Al-Si alloy, Al-Si-Cu alloy, Al-Cu -Mg alloy, Al-Zn-Cu alloy, Al-Zn-Mg-Cu alloy, Al-Si-Cu-Mg alloy or a combination of several of them.

specific Embodiment approach 3

[0065] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the ball milling process described in step two is: the ball-to-material ratio is (5-20):1, the rotating speed is 100-250rpm, and the time is 1-15h .

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Abstract

The invention discloses a preparation method of a zirconium tungstate-containing aluminum-based composite material with high comprehensive performance, and relates to a preparation method of a ZrW2O8 aluminum-based composite material. The problems that an existing ZrW2O8 / Al composite material is low in strength, and the thermal expansion coefficient of the composite material is large due to the fact that the content of gamma-ZrW2O8 is too high are solved. The method comprises the following steps: weighing ZrW2O8 powder, high-strength ceramic powder and an aluminum matrix as raw materials; the preparation method comprises the following steps: mixing high-strength ceramic powder and ZrW2O8 powder, carrying out ball milling, pre-pressing to obtain a reinforcement preform, preheating, preparing a molten metal matrix, carrying out liquid aluminum infiltration, and carrying out annealing treatment on the composite material. The volume fraction of a reinforcement is increased by adopting a mixing ratio of various particle sizes, internal stress is reduced through stress relief annealing treatment, so that the thermal expansion coefficient of the composite material is reduced, and the comprehensive performance of the composite material is improved.

Description

technical field [0001] The invention relates to a high comprehensive performance ZrW-containing 2 o 8 A method for the preparation of aluminum matrix composites. Background technique [0002] Most solid materials expand and contract when the ambient temperature changes. The thermal expansion and contraction of materials will reduce the structural stability of the device, thereby reducing the safety and reliability and shortening the service life. Therefore, it is necessary to develop low thermal expansion materials. Take the fiber optic gyroscope as an example. As the key to the navigation system, it requires extremely high precision. Low-expansion materials are mainly used in inertial navigation instruments such as fiber optic skeletons in fiber optic gyroscopes. Optical fibers are wound on the skeletons to form fiber optic coils. In the working temperature range of the fiber optic gyroscope (-40°C to 60°C), the fiber skeleton needs to maintain thermal matching with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C21/00C22C29/00C22C30/00C22F1/00C22F1/04B22D23/04
CPCC22C1/1005C22C21/00C22C30/00C22C29/005C22F1/04C22F1/00B22D23/04
Inventor 张强祝平周勇孝周畅武高辉修子扬姜龙涛陈国钦
Owner HARBIN INST OF TECH
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