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W-Si-Al-Ti-Zr-Y multi-element lightweight composite resistant to high-temperature oxidation and preparation method thereof

A technology for resisting high temperature oxidation and composite materials, applied in the field of metal composite materials and their preparation, can solve the problems of inability to overcome brittleness, inability to maintain passivation, and large differences in melting point.

Active Publication Date: 2019-01-01
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cr elements are preferentially oxidized to form a dense oxide layer Cr in the oxidation process of W-Cr alloy 2 o 3 , but long-term exposure to high temperature oxidation environment Cr 2 o 3 The oxide layer is difficult to maintain stability and cannot maintain long-term passivation
Due to the inability to overcome the brittle phase problem, W-Si alloy was rejected at home and abroad in the early stage of research, and W-Al alloy was not reported due to its huge difference in melting point (W melting point 3410 ° C, Al melting point 660 ° C)

Method used

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  • W-Si-Al-Ti-Zr-Y multi-element lightweight composite resistant to high-temperature oxidation and preparation method thereof
  • W-Si-Al-Ti-Zr-Y multi-element lightweight composite resistant to high-temperature oxidation and preparation method thereof
  • W-Si-Al-Ti-Zr-Y multi-element lightweight composite resistant to high-temperature oxidation and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] In this embodiment, the high temperature oxidation resistant W-Si-Al-Ti-Zr-Y multi-element lightweight composite material, wherein each component constitutes by mass percentage: WSi 2 40%, Al 15%, Ti 4%, Zr 2%, Y 3%, W 36%.

[0023] (chemical formula is W-9.3Si-15Al-4Ti-2Zr-3Y)

[0024] The original powder particle size is: WSi 2 The particle size of the powder is 5 microns, the particle size of the W powder is 2 microns, the particle size of the Ti powder is 3 microns, the particle size of the Al alloy powder is 3 microns, the particle size of the Y powder is 5 microns, and the particle size of the Zr powder is 5 microns.

[0025] The preparation method of high temperature oxidation resistant W-Si-Al-Ti-Zr-Y composite material in this embodiment comprises the following steps:

[0026] 1. Powder making: W-50wt.% Al pre-alloyed powder is obtained by using inert gas atomization method to make W-50wt.%Al pre-alloyed powder by mass ratio of 15% tungsten powder and mass r...

Embodiment 2

[0030] In this embodiment, the high temperature oxidation resistant W-Si-Al-Ti-Zr-Y multi-element lightweight composite material, wherein each component constitutes by mass percentage: WSi 2 50%, W 28.5%, Al 11.5%, Ti 4%, Zr 4%, Y 2%.

[0031] (Chemical formula is W-11.5Si-11.5Al-4Ti-4Zr-2Y)

[0032] The original powder particle size is: WSi 2 The particle size of the powder is 5 microns, the particle size of the W powder is 2 microns, the particle size of the Ti powder is 3 microns, the particle size of the Al alloy powder is 3 microns, the particle size of the Y powder is 5 microns, and the particle size of the Zr powder is 5 microns.

[0033] In this embodiment, the preparation method of the high-temperature oxidation-resistant W-Si-Al-Ti-Zr-Y multi-element lightweight composite material includes the following steps:

[0034] 1. Powder making: W-50wt.% Al pre-alloyed powder is obtained by using inert gas atomization method to make 11.5% tungsten powder and 11.5% aluminum...

Embodiment 3

[0038] In this embodiment, the high temperature oxidation resistant W-Si-Al-Ti-Zr-Y multi-element lightweight composite material, wherein each component constitutes by mass percentage: WSi2 60%, W 20%, Al 8%, Ti 6%, Zr 5%, Y 1%.

[0039] (chemical formula is W-14Si-8Al-6Ti-5Zr-1Y)

[0040] The original powder particle size is: WSi 2 The particle size of the powder is 5 microns, the particle size of the W powder is 2 microns, the particle size of the Ti powder is 3 microns, the particle size of the Al alloy powder is 3 microns, the particle size of the Y powder is 5 microns, and the particle size of the Zr powder is 5 microns.

[0041] The preparation method of high temperature oxidation resistant W-Si-Al-Ti-Zr-Y composite material in this embodiment comprises the following steps:

[0042] 1. Powder making: W-50wt.% Al pre-alloyed powder is obtained by using an inert gas atomization method to prepare tungsten powder with a mass ratio of 8% and aluminum powder with a mass rati...

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Abstract

The invention discloses a W-Si-Al-Ti-Zr-Y multi-element lightweight composite resistant to high-temperature oxidation and a preparation method thereof. The W-Si-Al-Ti-Zr-Y multi-element lightweight composite resistant to high-temperature oxidation is prepared from the following components in percentage by mass: 40-60% of WSi2, 15-8% of Al, 4-6% of Ti, 2-5% of Zr, 1-3% of Y and the balance of W. According to the W-Si-Al-Ti-Zr-Y multi-element lightweight composite disclosed by the invention, a W-based alloy is doped synergistically with the passivated elements Si and Al and the activated elements Y, Ti and Zr, and the resistance to high-temperature oxidation of the sintered W-Si-Al-Ti-Zr-Y multi-element lightweight composite is remarkably improved.

Description

technical field [0001] The invention relates to a metal composite material and a preparation method thereof, in particular to a high-temperature oxidation-resistant W-Si-Al-Ti-Zr-Y multi-element lightweight composite material and a preparation method thereof. Background technique [0002] Tungsten-based composite materials have excellent properties such as high melting point, high density, and high toughness, and are considered to be the most critical high-temperature structural materials in the future. However, due to poor high-temperature oxidation resistance, it cannot meet the requirements for the use of hot-end components in aerospace and other fields, and has become a key technical bottleneck restricting tungsten materials. [0003] The passivation elements Cr, Si and Al are important elements to improve the high temperature oxidation resistance of materials. At present, W-Cr alloy has been extensively studied by researchers at home and abroad. Cr elements are prefer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/18C22C1/10C22C1/03
CPCC22C1/1036C22C29/005C22C29/18
Inventor 罗来马黄科吴玉程刘东光昝祥朱晓勇
Owner HEFEI UNIV OF TECH
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