CN107267842A - A kind of high-melting-point high-entropy alloy and preparation method thereof - Google Patents
A kind of high-melting-point high-entropy alloy and preparation method thereof Download PDFInfo
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- CN107267842A CN107267842A CN201710492113.1A CN201710492113A CN107267842A CN 107267842 A CN107267842 A CN 107267842A CN 201710492113 A CN201710492113 A CN 201710492113A CN 107267842 A CN107267842 A CN 107267842A
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Abstract
The present invention relates to a kind of high-melting-point high-entropy alloy and preparation method thereof, belong to technical field of alloy material.First raw material is used as from Hf, Nb, Ta, Ti, Zr, Mo and W；Raw material is smelted into by foundry alloy button ingot under high-purity argon gas protection using high vacuum non-consumable arc-melting furnace；Lattice structure is determined by X-ray diffractometer；Quasistatic compression experiment is carried out at room temperature.Described two high-entropy alloys are respectively provided with two-phase BCC structures, and room temperature compresses lower yield strength more than 1550MPa, and compression strength reaches 2300MPa, and plasticity can reach 26%.The alloy also has certain plasticity while high intensity is kept, and is adapted to popularization and application.
Description
Technical field
The present invention relates to a kind of high-melting-point high entropy alloy material and preparation method thereof, belong to technical field of alloy material.
Background technology
High-entropy alloy be a kind of content at least containing five kinds of main metal elements and every kind of element 5%~35% it
Between, according to wait atomic ratio or close to wait atomic ratio design proportion, make the alloy entropy of mixing higher than alloy melting entropy a class alloy
Material.
The entropy of mixing of alloy increases and increased with alloy system constituent element number, so as to suppress the shape of intermetallic compound
Into, promote alloy formation solid solution.High-entropy alloy is more than or equal to 5 due to its component, and is coordinated according to equimolar ratio,
Cause the entropy of mixing of high-entropy alloy very high, so as to promote the generation of simple solid solution, it is suppressed that the formation of intermetallic compound,
So that high-entropy alloy has many performances for being better than other alloys.High-entropy alloy component number is more, and is formed again
Solid solution structure, this inevitably results in solid solution structure and there is certain distortion of lattice, and atomic size difference is bigger, distortion of lattice
It is more serious.Serious distortion of lattice can cause high solution strengthening, add the effect of atom sluggishness diffusion so that high-entropy alloy exhibition
Revealed good performance, such as excellent mechanical property, good wearability etc., with good Research Prospects.
2010, Senkov.O.N prepare first the WNbMoTa that is made up of completely refractory metal element and
WNbMoTaV high-melting-point high-entropy alloys.Two kinds of high-entropy alloy fusing points are all higher than 2600 DEG C, mechanical behavior under high temperature and traditional high temperature
Nickel-base alloy is compared to not a halfpenny the worse, but temperature-room type plasticity is poor, and breaking strain is only 2% and 1.5%., Senkov.O.N etc. in 2011
People improves obtained HfNbTaTiZr high-entropy alloys on the basis of WNbMoTaV high-entropy alloys, although plastic strain is brought up to
More than 50%, but the reduction of its room temperature compression yield strength is to only 929MPa.Then updating the high-melting-point with invention
In high-entropy alloy, breaking strain of most of high-melting-point high-entropy alloy under room temperature compression is less than 10%, and processing characteristics is poor, limit
The application of material is made.
The content of the invention
The problem of strong plasticity coordinates poor at room temperature it is an object of the invention to solving high-melting-point high-entropy alloy, there is provided one kind
High-melting-point high entropy alloy material and preparation method thereof, chooses seven kinds of dystectic metallic elements of Hf, Nb, Ta, Ti, Zr, Mo and W
Prepare two kinds of high-melting-point high-entropy alloys of HfNbTaTiZrW and HfNbTaTiZrMoW.
The purpose of the present invention is achieved by the following technical solution.
A kind of preparation method of high-melting-point high-entropy alloy, comprises the following steps：
Step 1: being made from seven kinds of elements of six kinds of elements of Hf, Nb, Ta, Ti, Zr, W or Hf, Nb, Ta, Ti, Zr, Mo, W
Dispensing is carried out for raw material, wherein the atom number of every kind of element in the alloy is equal.
Step 2: raw material to be sequentially placed into the water jacketed copper crucible of vacuum arc melting furnace according to the order of fusing point from low to high
In.
Step 3: closing fire door, burner hearth is vacuumized, high-purity argon gas is filled with afterwards as protective atmosphere.
Step 4: the striking melting under the protection of high-purity argon gas, is made foundry alloy button ingot, i.e., by raw material melt back time
Obtain high-melting-point high-entropy alloy.
Selected Hf, Nb, Ta, Ti, Zr, Mo, W raw metal purity is higher than 99.9wt.% in above-mentioned steps one.
Burner hearth vacuum is 2.5 × 10 in above-mentioned steps three-3MPa。
The pressure for being filled with argon gas atmosphere in above-mentioned steps three in smelting furnace is 0.06MPa.
Melting electric current is 450A~550A in above-mentioned steps four.
Alloy is kept for the time of liquid be at least 40 minutes in above-mentioned steps four.
Beneficial effect
A kind of high-melting-point high entropy alloy material that the present invention is provided, mainly uses Hf, Nb, Ta, Ti, Zr, Mo and W etc.
Refractory metal is made, and the Alloy At Room Temperature lower yield strength is more than 1550MPa, and breaking strain has reached 26%.
Brief description of the drawings
Fig. 1 is the X-ray diffractogram of the alloy HfNbTaTiZrW ingot castings of embodiment 1；
Fig. 2 is the alloy HfNbTaTiZrW room temperatures quasistatic compression engineering stress of embodiment 1-strain curve；
Fig. 3 is the X-ray diffractogram of the 2-in-1 golden HfNbTaTiZrMoW ingot castings of embodiment；
Fig. 4 is the 2-in-1 golden HfNbTaTiZrMoW room temperatures quasistatic compression engineering stress-strain curve of embodiment.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
High-melting-point high-entropy alloy HfNbTaTiZrW and preparation method thereof
The HfNbTaTiZrW high-entropy alloys that the present embodiment is provided, are made up of, the atom of the element of each in alloy six kinds of elements
Number is equal.
Comprise the following steps：
(1) raw material, wherein Hf, Nb, Ta, Zr and W metallic particles are used as from Hf, Nb, Ta, Ti, Zr and W metallic particles
Purity be 99.95wt.%, the purity of Ti particles is 99.999wt.%；
(2) above-mentioned metallic particles is compared 1 by atom number:1:1:1:1:1 ratio progress dispensing, i.e. w (Hf)=
22.0211g, w (Nb)=11.4627g, w (Ta)=22.3246g, w (Ti)=5.9096g, w (Zr)=11.2542g, w (W)
=22.6811g；
(3) above-mentioned metallic particles is pressed into fusing point from low to high, i.e. the order of Ti, Zr, Hf, Nb, Ta, W are put into smelting furnace
In water jacketed copper crucible；
(4) to being evacuated to 2.5 × 10 in vacuum arc melting furnace-3MPa, the high-purity argon gas for being then charged with 0.06MPa is made
For protective atmosphere；
(5) striking under high-purity argon gas protective atmosphere, melting electric current be 450A, during each melting alloy keep liquid when
Between be 5min, melting 8 times is overturn repeatedly, it is well mixed, foundry alloy button ingot is made.
Fig. 1 is the XRD spectrum of HfNbTaTiZrW high-entropy alloys prepared by embodiment 1, and the alloy is as can be seen from Figure
Two-phase BCC structures.Fig. 2 is stress of the HfNbTaTiZrW high-entropy alloys under room temperature quasistatic compression-should prepared by embodiment 1
Varied curve.The yield strength of the alloy is 1550MPa.There is obvious strain hardening effect to occur after yielding stage, final resistance to compression
Intensity reaches 2324MPa, and breaking strain is 26%.
Embodiment 2
High-melting-point high-entropy alloy HfNbTaTiZrMoW and preparation method thereof
The HfNbTaTiZrMoW high-entropy alloys that the present embodiment is provided, are made up of, the original of the element of each in alloy seven kinds of elements
Sub- number is equal.
Comprise the following steps：
(1) raw material, wherein Hf, Nb, Ta, Zr, Mo and W gold are used as from Hf, Nb, Ta, Ti, Zr, Mo and W metallic particles
The purity of metal particles is 99.95wt.%, and the purity of Ti particles is 99.999wt.%；
(2) above-mentioned metallic particles is pressed into atomic ratio 1:1:1:1:1:1:1 ratio progress dispensing, i.e. w (Hf)=
18.2842g, w (Nb)=9.5175g, w (Ta)=18.5362g, w (Ti)=4.9068g, w (Zr)=9.3444g, w (Mo)
=9.8279g, w (W)=18.8322g；
(3) above-mentioned metallic particles is pressed into fusing point from low to high, i.e. the order of Ti, Zr, Hf, Nb, Mo, Ta, W are put into smelting furnace
Water jacketed copper crucible in；
(4) to being evacuated to 2.5 × 10 in vacuum arc melting furnace-3MPa, the high-purity argon gas for being then charged with 0.06MPa is made
For protective atmosphere；
(5) striking under high-purity argon gas protective atmosphere, melting electric current be 550A, during each melting alloy keep liquid when
Between be 5min, melting 10 times is overturn repeatedly, it is well mixed, foundry alloy button ingot is made.
Fig. 3 is the XRD spectrum of HfNbTaTiZrMoW high-entropy alloys prepared by embodiment 2, as can be seen from Figure the alloy
For two-phase BCC structures.Fig. 4 is HfNbTaTiZrMoW high-entropy alloys answering under room temperature quasistatic compression prepared by embodiment 2
Force-strain curve.The yield strength of the alloy is 1636MPa, and compression strength is 2045MPa, and breaking strain is 16%.
Above is the explanation of preferred embodiment for the present invention.Here, it should be noted is that, not office of the invention
It is limited to above example, can be to this hair in the case where meeting the area requirements such as claims, the content of the invention and accompanying drawing
Bright made any modification, equal replacement or improvement etc., should be included within the scope of the present invention.
Claims (8)
1. a kind of high-melting-point high-entropy alloy, it is characterised in that：It is made up of six kinds of elements of Hf, Nb, Ta, Ti, Zr, W, every kind of element exists
Atom number in alloy is equal.
2. a kind of high-melting-point high-entropy alloy, it is characterised in that：It is made up of seven kinds of elements of Hf, Nb, Ta, Ti, Zr, Mo, W, Mei Zhongyuan
The atom number of element in the alloy is equal.
3. a kind of preparation method of high-melting-point high-entropy alloy, it is characterised in that：Comprise the following steps：
Step 1: being used as original from seven kinds of elements of six kinds of elements of Hf, Nb, Ta, Ti, Zr, W or Hf, Nb, Ta, Ti, Zr, Mo, W
Material carries out dispensing, wherein the atom number of every kind of element in the alloy is equal；
Step 2: raw material is sequentially placed into the water jacketed copper crucible of vacuum arc melting furnace according to the order of fusing point from low to high；
Step 3: closing fire door, burner hearth is vacuumized, high-purity argon gas is filled with afterwards as protective atmosphere；
Step 4: the striking melting under the protection of high-purity argon gas, is made foundry alloy button ingot by raw material melt back time, that is, obtains
High-melting-point high-entropy alloy.
4. a kind of preparation method of high-melting-point high-entropy alloy as claimed in claim 3, it is characterised in that：Institute in the step one
Hf, Nb, Ta, Ti, Zr, Mo, W raw metal purity of selection are higher than 99.9wt.%.
5. a kind of preparation method of high-melting-point high-entropy alloy as claimed in claim 3, it is characterised in that：Stove in the step 3
Thorax vacuum is 2.5 × 10-3MPa。
6. a kind of preparation method of high-melting-point high-entropy alloy as claimed in claim 3, it is characterised in that：Melted in the step 3
The pressure that argon gas atmosphere is filled with furnace is 0.06MPa.
7. a kind of preparation method of high-melting-point high-entropy alloy as claimed in claim 3, it is characterised in that：Melted in the step 4
Refining electric current is 450A~550A.
8. a kind of preparation method of high-melting-point high-entropy alloy as claimed in claim 3, it is characterised in that：Closed in the step 4
Gold is kept for the time of liquid be at least 40 minutes.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504881A (en) * | 2018-04-09 | 2018-09-07 | 山东农业大学 | A method of improving high-entropy alloy wear-resisting property |
| CN109201736A (en) * | 2018-08-22 | 2019-01-15 | 西安理工大学 | A kind of asynchronous rolling method of high-entropy alloy |
| CN109536817A (en) * | 2018-11-19 | 2019-03-29 | 中国科学院力学研究所 | It is a kind of with armour-piercing from the tungsten high-entropy alloy and preparation method thereof of sharp effect |
| CN110423931A (en) * | 2019-08-01 | 2019-11-08 | 大连理工大学 | A kind of electron-beam smelting homogenizes the method for preparing Ti-Zr-Hf-Nb-Ta infusibility high-entropy alloy |
| CN110423933A (en) * | 2019-09-06 | 2019-11-08 | 中国航空制造技术研究院 | A kind of bio-medical Ti-Zr-Hf-Nb-Ta system's high-entropy alloy and preparation method |
| CN110643942A (en) * | 2019-10-11 | 2020-01-03 | 中国科学院兰州化学物理研究所 | Spectrum-selective high-temperature solar energy absorption coating and preparation method thereof |
| CN110699587A (en) * | 2018-10-22 | 2020-01-17 | 南京航空航天大学 | Light high-strength high-toughness NbTiVZrAlx as-cast high-entropy alloy |
| CN111235455A (en) * | 2020-03-10 | 2020-06-05 | 中国人民解放军军事科学院国防科技创新研究院 | W-Ta-Mo-Nb-Zr high-temperature high-entropy alloy and preparation method thereof |
| CN111363964A (en) * | 2020-03-10 | 2020-07-03 | 中国人民解放军军事科学院国防科技创新研究院 | W-Ta-Mo-Nb-Hf-C high-temperature high-entropy alloy and preparation method thereof |
| CN112813329A (en) * | 2020-12-30 | 2021-05-18 | 中国人民解放军国防科技大学 | High-density W-containing high-activity high-entropy alloy and application thereof |
| CN113652595A (en) * | 2021-08-23 | 2021-11-16 | 太原理工大学 | High-strength and high-toughness TiZrHfNbTaWxRefractory high-entropy alloy and preparation method thereof |
| WO2021251145A1 (en) * | 2020-06-10 | 2021-12-16 | 国立大学法人大阪大学 | Multicomponent system alloy |
| CN114411094A (en) * | 2021-12-30 | 2022-04-29 | 南京航空航天大学 | High-entropy alloy nitride nano composite coating with cavitation erosion resistance and preparation method thereof |
| CN115584424A (en) * | 2022-11-01 | 2023-01-10 | 中广核研究院有限公司 | High-temperature-resistant and irradiation-resistant high-entropy alloy and preparation method and application thereof |
| CN116065076A (en) * | 2021-11-04 | 2023-05-05 | 哈尔滨工业大学 | Low-density refractory multi-principal element alloy and preparation method and application thereof |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504881A (en) * | 2018-04-09 | 2018-09-07 | 山东农业大学 | A method of improving high-entropy alloy wear-resisting property |
| CN109201736A (en) * | 2018-08-22 | 2019-01-15 | 西安理工大学 | A kind of asynchronous rolling method of high-entropy alloy |
| CN110699587A (en) * | 2018-10-22 | 2020-01-17 | 南京航空航天大学 | Light high-strength high-toughness NbTiVZrAlx as-cast high-entropy alloy |
| CN109536817B (en) * | 2018-11-19 | 2020-07-07 | 中国科学院力学研究所 | Tungsten high-entropy alloy with armor-piercing self-sharpening effect and preparation method thereof |
| CN109536817A (en) * | 2018-11-19 | 2019-03-29 | 中国科学院力学研究所 | It is a kind of with armour-piercing from the tungsten high-entropy alloy and preparation method thereof of sharp effect |
| CN110423931A (en) * | 2019-08-01 | 2019-11-08 | 大连理工大学 | A kind of electron-beam smelting homogenizes the method for preparing Ti-Zr-Hf-Nb-Ta infusibility high-entropy alloy |
| CN110423933A (en) * | 2019-09-06 | 2019-11-08 | 中国航空制造技术研究院 | A kind of bio-medical Ti-Zr-Hf-Nb-Ta system's high-entropy alloy and preparation method |
| CN110643942A (en) * | 2019-10-11 | 2020-01-03 | 中国科学院兰州化学物理研究所 | Spectrum-selective high-temperature solar energy absorption coating and preparation method thereof |
| CN110643942B (en) * | 2019-10-11 | 2021-07-20 | 中国科学院兰州化学物理研究所 | Spectrum-selective high-temperature solar energy absorption coating and preparation method thereof |
| CN111363964A (en) * | 2020-03-10 | 2020-07-03 | 中国人民解放军军事科学院国防科技创新研究院 | W-Ta-Mo-Nb-Hf-C high-temperature high-entropy alloy and preparation method thereof |
| CN111235455A (en) * | 2020-03-10 | 2020-06-05 | 中国人民解放军军事科学院国防科技创新研究院 | W-Ta-Mo-Nb-Zr high-temperature high-entropy alloy and preparation method thereof |
| CN111363964B (en) * | 2020-03-10 | 2021-08-20 | 中国人民解放军军事科学院国防科技创新研究院 | W-Ta-Mo-Nb-Hf-C high-temperature high-entropy alloy and preparation method thereof |
| WO2021251145A1 (en) * | 2020-06-10 | 2021-12-16 | 国立大学法人大阪大学 | Multicomponent system alloy |
| CN112813329A (en) * | 2020-12-30 | 2021-05-18 | 中国人民解放军国防科技大学 | High-density W-containing high-activity high-entropy alloy and application thereof |
| CN113652595A (en) * | 2021-08-23 | 2021-11-16 | 太原理工大学 | High-strength and high-toughness TiZrHfNbTaWxRefractory high-entropy alloy and preparation method thereof |
| CN116065076A (en) * | 2021-11-04 | 2023-05-05 | 哈尔滨工业大学 | Low-density refractory multi-principal element alloy and preparation method and application thereof |
| CN116065076B (en) * | 2021-11-04 | 2024-04-12 | 哈尔滨工业大学 | Low-density refractory multi-principal element alloy and preparation method and application thereof |
| CN114411094A (en) * | 2021-12-30 | 2022-04-29 | 南京航空航天大学 | High-entropy alloy nitride nano composite coating with cavitation erosion resistance and preparation method thereof |
| CN115584424A (en) * | 2022-11-01 | 2023-01-10 | 中广核研究院有限公司 | High-temperature-resistant and irradiation-resistant high-entropy alloy and preparation method and application thereof |
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Application publication date: 20171020 |