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High-temperature-oxidation-resistance diphasic tungsten composite material and preparation method thereof

A high-temperature oxidation-resistant composite material technology, which is applied in the field of high-temperature oxidation-resistant dual-phase tungsten composite materials and its preparation, can solve the problems of serious energy consumption, low output not enough to meet the actual production and application requirements, and the introduction of impurities.

Active Publication Date: 2018-05-01
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional mechanical alloying process has many disadvantages, such as serious energy consumption; low output is not enough to meet the needs of actual production applications; incomplete mechanical alloying; the introduction of impurities, etc.
However, using WSi 2 Doped W-Cr alloy has not been reported

Method used

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  • High-temperature-oxidation-resistance diphasic tungsten composite material and preparation method thereof
  • High-temperature-oxidation-resistance diphasic tungsten composite material and preparation method thereof
  • High-temperature-oxidation-resistance diphasic tungsten composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] High temperature oxidation resistance (WSi 2 ) 0.005 (W 0.67 Cr 0.33 ) 0.995 Dual-phase tungsten alloy composite material, the doped alloy dual-phase component is WSi 2 With W 0.67 Cr 0.33 , Where each component is composed of atomic percentage: WSi 2 0.5%, W 0.67 Cr 0.33 99.5%.

[0022] High temperature oxidation resistance (WSi 2 ) 0.005 (W 0.67 Cr 0.33 ) 0.995 The preparation method of dual-phase tungsten alloy composite is as follows:

[0023] 1. Flour milling: the proportion of WSi 2 With W 0.67 Cr 0.33 The alloy powder is stirred for 2 hours in a powder mixer at 400 rpm to obtain a two-phase composite powder; the original powder particle size is: WSi 2 The average particle size is 4.0 microns, W 0.67 Cr 0.33 The average particle size is 5.2 microns.

[0024] 2. Sintering: Put the two-phase composite powder into the graphite mold, and then put the mold into the spark plasma sintering furnace. Vacuum the sintering furnace at room temperature. After 8.5 minutes, it will be ...

Embodiment 2

[0028] High temperature oxidation resistance (WSi 2 ) 0.015 (W 0.67 Cr 0.33 ) 0.985 Dual-phase tungsten alloy composite material, the doped alloy dual-phase component is WSi 2 With W 0.67 Cr 0.33 , Where each component is composed of atomic percentage: WSi 2 1.5%, W 0.67 Cr 0.33 98.5%.

[0029] High temperature oxidation resistance (WSi 2 ) 0.015 (W 0.67 Cr 0.33 ) 0.985 The preparation method of dual-phase tungsten alloy composite is as follows:

[0030] 1. Flour milling: WSi 2 With a certain percentage of W 0.67 Cr 0.33 The alloy powder is stirred for 2 hours in a powder mixer at 400 rpm to obtain a two-phase composite powder; the original powder particle size is: WSi 2 The average particle size is 4.0 microns, W 0.67 Cr 0.33 The average particle size is 5.2 microns.

[0031] 2. Sintering: Put the two-phase composite powder into the graphite mold, then put the mold into the spark plasma sintering furnace, vacuum the sintering furnace at room temperature, heat up to 1450℃ for 1 minut...

Embodiment 3

[0035] High temperature oxidation resistance (WSi 2 ) 0.01 (W 0.67 Cr 0.33 ) 0.99 Dual-phase tungsten alloy composite material, the doped alloy dual-phase component is WSi 2 With W 0.67 Cr 0.33 , Where each component is composed of atomic percentage: WSi 2 1%, W 0.67 Cr 0.33 99%.

[0036] High temperature oxidation resistance (WSi 2 ) 0.01 (W 0.67 Cr 0.33 ) 0.99 The preparation method of dual-phase tungsten alloy composite is as follows:

[0037] 1. Flour milling: WSi 2 With a certain percentage of W 0.67 Cr 0.33 The alloy powder is stirred for 2 hours in a powder mixer at 400 rpm to obtain a two-phase composite powder; the original powder particle size is: WSi 2 The average particle size is 4.0 microns, W 0.67 Cr 0.33 The average particle size is 5.2 microns.

[0038] 2. Sintering: Put the two-phase composite powder into the graphite mold, and then put the mold into the spark plasma sintering furnace. Vacuum the sintering furnace at room temperature. After 8.5 minutes, it will be hea...

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Abstract

The invention discloses a high-temperature-oxidation-resistance diphasic tungsten composite material and a preparation method thereof. Alloy diphasic components mixed in the high-temperature-oxidation-resistance diphasic tungsten composite material comprise, by atomic percent, 0.5-1.5% of WSi<2>, and 98.5-99.5% of W<0.67>Cr<0.33>. WSi<2> alloy powder and W<0.67>Cr<0.33>(W-12wt.%Cr) alloy powder which is prepared through self propagating are proportionally mixed, and an alloy sample is prepared through spark plasma sintering. Under the diphasic synergistic effect, the high temperature oxidationresistance of tungsten-base alloy is remarkably improved, and moreover, the mechanical properties of the tungsten-base composite material at the high temperature are 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 dual-phase tungsten composite material and a preparation method thereof. Background technique [0002] Controlled thermonuclear fusion energy is the ideal energy source for the future of human society, and is considered to be one of the main ways to effectively solve the future energy needs of mankind. Tungsten has the characteristics of high melting point, high thermal conductivity, minimal adsorption of deuterium and tritium, low radioactivity, non-reaction with H, and strong sputtering resistance. From the current research, tungsten is considered to be the most promising PFMs ( Plasma FacingMaterials). But when the fusion reactor has a coolant failure accident, the air will enter the vacuum reactor, and the PFMs will withstand an instantaneous temperature of 1200°C. In practical applications, the synergistic effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/02C22C1/05
CPCC22C1/05C22C29/005C22C29/02
Inventor 罗来马黄科刘家琴昝祥刘东光朱晓勇吴玉程
Owner HEFEI UNIV OF TECH