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A high density y 2 o 3 Preparation method of doped w-re alloy

A high-density and high-precision technology, applied in the field of preparation of high-density Y2O3-doped W-Re alloys, can solve the problems of easy doping impurities, the influence of bulk properties, etc., to improve the bonding force of grain boundaries and improve the pinning effect. , the effect of improving toughness

Active Publication Date: 2022-04-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The composite powder prepared by the traditional mechanical alloying method is easy to be doped with impurities, which will have a certain impact on the properties of the bulk prepared by subsequent sintering

Method used

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  • A high density y <sub>2</sub> o <sub>3</sub> Preparation method of doped w-re alloy
  • A high density y <sub>2</sub> o <sub>3</sub> Preparation method of doped w-re alloy

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Embodiment 1

[0019] In this embodiment, the preparation method of the alloy element and rare earth oxide doped tungsten-based composite material is as follows:

[0020] Step 1: Preparation of precursor powder

[0021] A certain amount of yttrium nitrate hexahydrate (Y(NO 3 ) 3 ·6H 2 O, Aladdin, purity ≥ 99.9%), ammonium rhenate (NH 4 ReO 4 , purity ≥ 99.9%) and surfactant triethanolamine oleate (C 16 h 22 N 4 o 3 , purity ≥ 99%) were dissolved in a certain amount of deionized water, and then the three solutions were mixed and stirred evenly; then added ammonium metatungstate (AMT, Aladdin, purity ≥ 99.95%) solution dissolved in a certain amount of deionized water Then put it into a magnetic stirrer to heat and stir well, and finally add a certain amount of oxalic acid dihydrate (C 2 h 2 o 4 2H 2 O, analytically pure) as a precipitant, the mixed solution was heated at a constant temperature in a magnetic stirrer at 120°C to evaporate the liquid, and then put into an oven for dry...

Embodiment 2

[0028]In this embodiment, the preparation method of the alloy element and rare earth oxide doped tungsten-based composite material is as follows:

[0029] Step 1: Preparation of precursor powder

[0030] A certain amount of yttrium nitrate hexahydrate (Y(NO 3 ) 3 ·6H 2 O, Aladdin, purity ≥ 99.9%), ammonium rhenate (NH 4 ReO 4 , purity ≥ 99.9%) and surfactant triethanolamine oleate (C 16 h 22 N 4 o 3 , purity ≥ 99%) were dissolved in a certain amount of deionized water, and then the three solutions were mixed and stirred evenly; then added ammonium metatungstate (AMT, Aladdin, purity ≥ 99.95%) solution dissolved in a certain amount of deionized water Then put it into a magnetic stirrer to heat and stir well, and finally add a certain amount of oxalic acid dihydrate (C 2 h 2 o 4 2H 2 O, analytically pure) as a precipitant, the mixed solution was heated at a constant temperature in a magnetic stirrer at 140°C and evaporated to dryness, and then put into an oven for dr...

Embodiment 3

[0037] In this embodiment, the preparation method of the alloy element and rare earth oxide doped tungsten-based composite material is as follows:

[0038] Step 1: Preparation of precursor powder

[0039] A certain amount of yttrium nitrate hexahydrate (Y(NO 3 ) 3 ·6H 2 O, Aladdin, purity ≥ 99.9%), ammonium rhenate (NH 4 ReO 4 , purity ≥ 99.9%) and surfactant triethanolamine oleate (C 16 h 22 N 4 o 3 , purity ≥ 99%) were dissolved in a certain amount of deionized water, and then the three solutions were mixed and stirred evenly; then added ammonium metatungstate (AMT, Aladdin, purity ≥ 99.95%) solution dissolved in a certain amount of deionized water Then put it into a magnetic stirrer to heat and stir well, and finally add a certain amount of oxalic acid dihydrate (C 2 h 2 o 4 2H 2 O, analytically pure) as a precipitant, the mixed solution was heated at a constant temperature in a magnetic stirrer at 130 ° C to evaporate the liquid, and then put into an oven for d...

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Abstract

The invention discloses a high density Y 2 o 3 Preparation method of doped W‑Re alloy, using a combination of wet chemical method and hydrogen reduction to prepare W‑Re‑Y 2 o 3 Composite powder, add dispersant triethanolamine oleate to make HReO 4 and Y 2 o 3 It is more evenly distributed in the precursor powder and the subsequent hydrogen reduction powder; and then the block is prepared by spark plasma sintering technology. During the sintering process, the Re element dissolves into the tungsten matrix, and the Y 2 o 3 The particles can pin the dislocations, which can significantly refine the grains and improve the plasticity of the tungsten-based composites.

Description

technical field [0001] The present invention relates to a kind of high density Y 2 o 3 Preparation method of doped W-Re alloy, using wet chemical method and hydrogen reduction to prepare nanoscale Y 2 o 3 Doping W-Re alloy powder, and then using spark plasma sintering to obtain high-density W-Re-Y 2 o 3 alloy. Background technique [0002] Medical CT machines are mainly used to comprehensively detect various organs and tissue lesions of the human body, and help doctors analyze and treat them. The X-ray generator is a key component of CT equipment, and the anode target is an important part of the X-ray generator. When X-rays are irradiated, they will gather at a certain focus on the target surface and generate high heat. The local temperature of the target surface is as high as 2600°C, and the average temperature of the entire anode target is also above 1300°C. Therefore, the anode in the X-ray tube The target faces a harsh working environment. Due to its high melting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C27/04C22C1/10B22F3/105B22F9/22
CPCC22C1/05C22C27/04B22F9/22B22F3/105
Inventor 罗来马吴玉程黄胜猛昝祥朱晓勇
Owner HEFEI UNIV OF TECH
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