CN102304678A - Gd-Co-Al-Y block metal glass and preparation method thereof - Google Patents
Gd-Co-Al-Y block metal glass and preparation method thereof Download PDFInfo
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- CN102304678A CN102304678A CN201110295609A CN201110295609A CN102304678A CN 102304678 A CN102304678 A CN 102304678A CN 201110295609 A CN201110295609 A CN 201110295609A CN 201110295609 A CN201110295609 A CN 201110295609A CN 102304678 A CN102304678 A CN 102304678A
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- 229910018138 Al-Y Inorganic materials 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 title claims description 34
- 239000002184 metal Substances 0.000 title claims description 34
- 239000011521 glass Substances 0.000 title claims description 33
- 239000000956 alloy Substances 0.000 claims abstract description 56
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 56
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000005300 metallic glass Substances 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 239000010949 copper Substances 0.000 claims abstract description 9
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 38
- 229910052786 argon Inorganic materials 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 14
- 239000007791 liquid phase Substances 0.000 claims description 9
- 238000004781 supercooling Methods 0.000 claims description 9
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 7
- 229910017052 cobalt Inorganic materials 0.000 claims description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 7
- 238000010926 purge Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- 238000003723 Smelting Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 6
- 239000010936 titanium Substances 0.000 abstract description 6
- 229910052719 titanium Inorganic materials 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract description 3
- 239000012300 argon atmosphere Substances 0.000 abstract 1
- 239000008204 material by function Substances 0.000 abstract 1
- 238000005057 refrigeration Methods 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 238000002441 X-ray diffraction Methods 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 238000000113 differential scanning calorimetry Methods 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 229910020639 Co-Al Inorganic materials 0.000 description 4
- 229910020675 Co—Al Inorganic materials 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000005275 alloying Methods 0.000 description 1
- 230000005492 condensed matter physics Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004455 differential thermal analysis Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
本发明涉及一种Gd-Co-Al-Y块体金属玻璃及其制备方法。该合金以钆为主要组元，其组成可用公式表示为：GdaCobAlcYd，其中51.0≤a≤53.2、17.0≤b≤18.5、25.0≤c≤29.0、1.0≤d≤4.0，且a+b+c+d=100。该合金是将纯度均不低于99.5%（质量百分比）的Gd、Co、Al、Y按规定原子百分比配料，在钛吸附的氩气氛电弧熔中将合金反复熔化至成分均匀，获得母合金铸锭，然后采用水冷铜模吸铸法获得最大直径为8毫米的块体金属玻璃。本发明提供的Gd-Co-Al-Y块体金属玻璃，具有很高的非晶形成能力和热稳定性，在磁致冷功能材料及结构材料方面有广阔的应用前景。
The invention relates to a Gd-Co-Al-Y bulk metallic glass and a preparation method thereof. The alloy uses gadolinium as the main component, and its composition can be expressed as: Gd a Co b Al c Y d , where 51.0≤a≤53.2, 17.0≤b≤18.5, 25.0≤c≤29.0, 1.0≤d≤4.0, And a+b+c+d=100. The alloy is made of Gd, Co, Al and Y with a purity of not less than 99.5% (mass percentage) according to the specified atomic percentage, and the alloy is repeatedly melted in the argon atmosphere arc melting with titanium adsorption until the composition is uniform, and the master alloy casting is obtained. Ingots, and then adopt the water-cooled copper mold suction casting method to obtain bulk metallic glasses with a maximum diameter of 8 mm. The Gd-Co-Al-Y bulk metallic glass provided by the invention has high amorphous forming ability and thermal stability, and has broad application prospects in magnetic refrigeration functional materials and structural materials.
Description
Technical field
The present invention relates to the block metal glass field, particularly relating to a kind of is the bulk metallic glass materials and preparation method thereof of matrix with the rare earth.
Background technology
Generally, solid metal and alloy thereof all exist with crystalline state.Nineteen sixty Duwez finds that under quick refrigerative condition, AuSi is that liquid alloy forms non-crystalline state in process of setting, causes the great attention of material supply section educational circles.Preparing three-dimensional dimension in late 1980s is the developing important milestone of non-crystaline amorphous metal greater than the block metal glass of 1mm all.Different with traditional amorphous thin ribbon that utilizes fast quenching to get rid of the preparation of band method, block metal glass mainly is the composition design through alloy, rather than relies on quick refrigerative technology to obtain.At present, the foundry engieering of routine under the speed of cooling condition that can reach, kind of alloy system can be prepared block metal glass surplus in the of existing tens.Result of study in recent years shows, rare earth based block metal glass, for example Gd
60Co
26Al
14, Ho
30Y
26Al
24Co
20, Er
50Al
24Co
20Y
6Deng, have big magnetic entropy to become and relative refrigerating duty, be suitable as very much magnetic refrigerating working medium and use.Yet limited amorphous formation ability and lower thermostability become rare earth based block metal glass huge obstruction on practical applications.Therefore, further promote of the application of rare earth based block metal glass, also must continue to improve the amorphous formation ability and the thermostability thereof of alloy, prepare larger sized non-crystaline amorphous metal at the magnetic refrigerating field.In addition, the research of block metal glass is that some great problem in science also provide new opportunity in Materials science and the Condensed Matter Physics.
Existing result of study shows, adopts water cooled copper mould to inhale the method for casting, can be Gd with composition
52.5Co
18.5Al
29Alloy to form the greatest circle column diameter be the block metal glass of 3mm, and this alloy also has big magnetic entropy and becomes and refrigerating duty relatively.Therefore, in this alloy system, mousing out a kind of method prepares the Gd-Co-Al metallic glass with better amorphous formation ability and has very important significance.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; Adopt the method for alloying; Through on the basis of Gd-Co-Al block metal glass composition, adopting ytterbium to substitute the method for part aluminium; A kind of Gd-Co-Al-Y block metal glass with better amorphous formation ability and thermostability and preparation method thereof is provided, makes it be more suitable for using as magnetic refrigerating working medium.
The present invention realizes through following technical scheme, is specially:
Its composition of Gd-Co-Al-Y block metal glass of the present invention and atomic percent are: Gd
aCo
bAl
cY
d, wherein 51.0≤a≤53.2,17.0≤b≤18.5,25.0≤c≤29.0,1.0≤d≤4.0, and a+b+c+d=100.
Gd-Co-Al-Y block metal glass of the present invention, its component and atomic percent thereof are preferably: Gd
51.7Co
18.2Al
26.6Y
3.5
Gd-Co-Al-Y block metal glass of the present invention, its component and atomic percent thereof can also be Gd
53.2Co
17.1Al
28.7Y
1.0
Gd-Co-Al-Y bulk-metallic glass of the present invention, its maximum diameter are 8 millimeters, and maximum supercooling liquid phase region width is 77K.
The preparation method of Gd-Co-Al-Y block metal glass of the present invention, it comprises following steps:
(1) presses Gd
51.0 ~ 53.2Co
17.0 ~ 18.5Al
25.0 ~ 29.0Y
1.0 ~ 4.0The chemical formula weighing; Wherein gadolinium, cobalt, aluminium, ytterbium purity of raw materials are more than 99.5% (mass percent);
(2) will be set by step (1) raw material of preparing put into non-consumable arc furnace, be evacuated to 3 * 10
-5More than the torr; After high-purity argon gas purging method cleaning 1 ~ 2 time, the melting 4 ~ 6 times of under 1 atmospheric high-purity argon gas protection, overturning repeatedly is till smelting temperature melts with raw material;
(3) will be set by step (2) melted mother alloy put into vacuum arc fumace and inhale the cast copper crucible, cast cylindric sample with inhaling behind the alloy melting.
The invention has the advantages that: Gd-Co-Al-Y block metal glass provided by the present invention; Can form diameter is the above single non-crystal structure of 4mm; Its maximum critical diameter can reach 8mm, and it is much larger than the diameter of the non-crystal structure of Gd-Co-Al metallic glass formation.And the Gd-Co-Al-Y block metal glass that invention is provided has higher thermostability, and supercooling liquid phase region width maximum can reach 77K, and it is compared the Gd-Co-Al metallic glass and has higher thermostability.
The preparation method of Gd-Co-Al-Y block metal glass provided by the invention in addition has that preparation technology is simple, the material microstructure structure is advantages such as single non-crystal structure.
Description of drawings
Fig. 1 is the Gd of the embodiment of the invention 1,2,3,4 preparations
53.2Co
17.1Al
28.7Y
1.0, Gd
51.5Co
18.0Al
28.5Y
2.0, Gd
51.7Co
18.2Al
26.6Y
3.5, Gd
52.5Co
18.5Al
25.0Y
4.0The X-ray diffraction spectrum of block metal glass;
Fig. 2 is the Gd of the embodiment of the invention 1,2,3,4 preparations
53.2Co
17.1Al
28.7Y
1.0, Gd
51.5Co
18.0Al
28.5Y
2.0, Gd
51.7Co
18.2Al
26.6Y
3.5, Gd
52.5Co
18.5Al
25.0Y
4.0The differential thermal analysis curve of block metal glass.
Embodiment
Embodiment 1:Gd
53.2Co
17.1Al
28.7Y
1.0The preparation of block metal glass and thermostability
Purity is pressed Gd greater than gadolinium, cobalt, aluminium, the ytterbium raw material of 99.5% (weight percent)
53.2Co
17.1Al
28.7Y
1.0The chemical formula weighing is put into the argon atmospher non-consumable arc furnace of titanium absorption with the raw material for preparing, and utilizes mechanical pump and DP two-stage vacuum device to be evacuated to 3 * 10
-5More than the torr; After utilizing the high-purity argon gas purging method to clean 1 ~ 2 time, the melting of under a standard atmospheric pressure or the high-purity argon gas protection a little more than 1 standard atmospheric pressure, overturning is repeatedly processed mother alloy 4 ~ 6 times; To put into the vacuum arc fumace water-cooled by the melted mother alloy of above-mentioned steps and inhale the cast copper crucible, to cast diameter be 4 millimeters cylindrical sample with inhaling behind the alloy melting.X-ray diffraction analysis shows in the diffraction spectra of alloy does not find any crystalline diffraction peak, explains that alloy is made up of amorphous phase.Differential scanning calorimetry shows the second-order transition temperature (T of alloy
g) be 598 Kelvins, the initial crystallization temperature (T of alloy
x) be 666 Kelvins, the supercooling liquid phase region width of alloy (Δ T=T
x-T
g) be 77 Kelvins.
Embodiment 2:Gd
51.5Co
18.0Al
28.5Y
2.0The preparation of block metal glass and thermostability
Purity is pressed Gd greater than gadolinium, cobalt, aluminium, the ytterbium raw material of 99.5% (weight percent)
51.5Co
18.0Al
28.5Y
2.0The chemical formula weighing is put into the argon atmospher non-consumable arc furnace of titanium absorption with the raw material for preparing, and utilizes mechanical pump and DP two-stage vacuum device to be evacuated to 3 * 10
-5More than the torr; After utilizing the high-purity argon gas purging method to clean 1 ~ 2 time, the melting of under a standard atmospheric pressure or the high-purity argon gas protection a little more than 1 standard atmospheric pressure, overturning is repeatedly processed mother alloy 4 ~ 6 times; To put into the vacuum arc fumace water-cooled by the melted mother alloy of above-mentioned steps and inhale the cast copper crucible, to cast diameter be 4 millimeters cylindrical sample with inhaling behind the alloy melting.X-ray diffraction analysis shows in the diffraction spectra of alloy does not find any crystalline diffraction peak, explains that alloy is made up of amorphous phase.Differential scanning calorimetry shows the second-order transition temperature (T of alloy
g) be 615 Kelvins, the initial crystallization temperature (T of alloy
x) be 676 Kelvins, the supercooling liquid phase region width of alloy (Δ T=T
x-T
g) be 61 Kelvins.
Embodiment 3: Gd
51.7Co
18.2Al
26.6Y
3.5The preparation of block metal glass and thermostability
Purity is pressed Gd greater than gadolinium, cobalt, aluminium, the ytterbium raw material of 99.5% (weight percent)
51.5Co
18Al
28.5Y
3.5The chemical formula weighing is put into the argon atmospher non-consumable arc furnace of titanium absorption with the raw material for preparing, and utilizes mechanical pump and DP two-stage vacuum device to be evacuated to 3 * 10
-5More than the torr; After utilizing the high-purity argon gas purging method to clean 1 ~ 2 time, the melting of under a standard atmospheric pressure or the high-purity argon gas protection a little more than 1 standard atmospheric pressure, overturning is repeatedly processed mother alloy 4 ~ 6 times; To put into the vacuum arc fumace water-cooled by the melted mother alloy of above-mentioned steps and inhale the cast copper crucible, to cast diameter be 8 millimeters cylindrical sample with inhaling behind the alloy melting.X-ray diffraction analysis shows in the diffraction spectra of alloy does not find any crystalline diffraction peak, explains that alloy is made up of amorphous phase.Differential scanning calorimetry shows the second-order transition temperature (T of alloy
g) be 593 Kelvins, the initial crystallization temperature (T of alloy
x) be 663 Kelvins, the supercooling liquid phase region width of alloy (Δ T=T
x-T
g) be 70 Kelvins.
Embodiment 4:Gd
52.5Co
18.5Al
25.0Y
4.0The preparation of block metal glass and thermostability
Purity is pressed Gd greater than gadolinium, cobalt, aluminium, the ytterbium raw material of 99.5% (weight percent)
52.5Co
18.5Al
25.0Y
4.0The chemical formula weighing is put into the argon atmospher non-consumable arc furnace of titanium absorption with the raw material for preparing, and utilizes mechanical pump and DP two-stage vacuum device to be evacuated to 3 * 10
-5More than the torr; After utilizing the high-purity argon gas purging method to clean 1 ~ 2 time, the melting of under a standard atmospheric pressure or the high-purity argon gas protection a little more than 1 standard atmospheric pressure, overturning is repeatedly processed mother alloy 4 ~ 6 times; To put into the vacuum arc fumace water-cooled by the melted mother alloy of above-mentioned steps and inhale the cast copper crucible, to cast diameter be 3 millimeters cylindrical sample with inhaling behind the alloy melting.X-ray diffraction analysis shows in the diffraction spectra of alloy does not find any crystalline diffraction peak, explains that alloy is made up of amorphous phase.Differential scanning calorimetry shows the second-order transition temperature (T of alloy
g) be 599 Kelvins, the initial crystallization temperature (T of alloy
x) be 653 Kelvins, the supercooling liquid phase region width of alloy (Δ T=T
x-T
g) be 54 Kelvins.
Embodiment 5 ~ 10:Gd
53.0Co
17.0Al
29.0Y
1.0, Gd
52.5Co
18.5Al
27.5Y
1.5, Gd
52.5Co
18.5Al
26.5Y
2.5, Gd
52.7Co
17.0Al
28.3Y
2.0Gd
52.2Co
18.5Al
26.3Y
3.0, Gd
51.0Co
18.0Al
28.0Y
3.0The preparation of block metal glass and thermostability
Purity is pressed Gd respectively greater than gadolinium, cobalt, aluminium, the ytterbium raw material of 99.5% (weight percent)
53.0Co
17.0Al
29.0Y
1.0, Gd
52.5Co
18.5Al
27.5Y
1.5, Gd
52.5Co
18.5Al
26.5Y
2.5, Gd
52.7Co
17.0Al
28.3Y
2.0Gd
52.2Co
18.5Al
26.3Y
3.0, Gd
51.0Co
18.0Al
28.0Y
3.0The chemical formula weighing is put into the argon atmospher non-consumable arc furnace of titanium absorption with the raw material for preparing, and utilizes mechanical pump and DP two-stage vacuum device to be evacuated to 3 * 10
-5More than the torr; After utilizing the high-purity argon gas purging method to clean 1 ~ 2 time, the melting of under a standard atmospheric pressure or the high-purity argon gas protection a little more than 1 standard atmospheric pressure, overturning is repeatedly processed mother alloy 4 ~ 6 times; To put into the vacuum arc fumace water-cooled by the melted mother alloy of above-mentioned steps and inhale the cast copper crucible, cast cylindrical sample inhaling behind the alloy melting.X-ray diffraction analysis shows in the diffraction spectra of alloy does not find any crystalline diffraction peak, explains that alloy is made up of amorphous phase.The diameter of its cylindrical sample and the second-order transition temperature (T that shows alloy through differential scanning calorimetry
g), the initial crystallization temperature (T of alloy
x), the supercooling liquid phase region width of alloy (Δ T=T
x-T
g) like table 1.
The thermal physical property parameter of table 1:Gd-Co-Al-Y block metal glass
Annotate: 1) the symbol implication is following in the table:
DCritical size under-this experiment condition;
T g -second-order transition temperature;
T x -crystallization begins temperature;
Δ T=
T x -
T g -supercooling liquid phase region width.
2) in the table during each composition sample measurement used heating rate be 20 K/min.
Claims (5)
1. a Gd-Co-Al-Y block metal glass is characterized in that its composition and atomic percent are: Gd
aCo
bAl
cY
d, wherein 51.0≤a≤53.2,17.0≤b≤18.5,25.0≤c≤29.0,1.0≤d≤4.0, and a+b+c+d=100.
2. according to Gd-Co-Al-Y block metal glass according to claim 1, it is characterized in that component and atomic percent thereof are: Gd
51.7Co
18.2Al
26.6Y
3.5
3. according to Gd-Co-Al-Y block metal glass according to claim 1, it is characterized in that component and atomic percent thereof are: Gd
53.2Co
17.1Al
28.7Y
1.0
4. according to Gd-Co-Al-Y bulk-metallic glass according to claim 1, it is characterized in that the block metal glass maximum diameter is 8 millimeters, maximum supercooling liquid phase region width is 77K.
5. according to the preparation method of the said Gd-Co-Al-Y block metal glass of claim 1, it is characterized in that comprising following steps:
(1) presses Gd
51.0 ~ 53.2Co
17.0 ~ 18.5Al
25.0 ~ 29.0Y
1.0 ~ 4.0The chemical formula weighing; Wherein gadolinium, cobalt, aluminium, ytterbium purity of raw materials are more than 99.5% (mass percent);
(2) will be set by step (1) raw material of preparing put into non-consumable arc furnace, be evacuated to 3 * 10
-5More than the torr; After high-purity argon gas purging method cleaning 1 ~ 2 time, the melting 4 ~ 6 times of under 1 atmospheric high-purity argon gas protection, overturning repeatedly is till smelting temperature melts with raw material;
(3) will be set by step (2) melted mother alloy put into vacuum arc fumace and inhale the cast copper crucible, cast cylindric sample with inhaling behind the alloy melting.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409650A (en) * | 2013-07-25 | 2013-11-27 | 北京大学 | Novel method for utilizing hydrogen plasma electric arc melting technology to prepare high-purity rare earth gadolinium elementary substance |
| CN106350690A (en) * | 2015-07-17 | 2017-01-25 | 中国科学院物理研究所 | Rare earth gadolinium-based amorphous alloy stripe used for magnetic refrigerant material in room temperature range, and preparation method of rare earth gadolinium-based amorphous alloy stripe |
| CN111321358A (en) * | 2020-04-17 | 2020-06-23 | 中国科学院物理研究所 | Amorphous alloy with spontaneous color change on surface, and preparation method and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409650A (en) * | 2013-07-25 | 2013-11-27 | 北京大学 | Novel method for utilizing hydrogen plasma electric arc melting technology to prepare high-purity rare earth gadolinium elementary substance |
| CN103409650B (en) * | 2013-07-25 | 2014-11-12 | 北京大学 | Novel method for utilizing hydrogen plasma electric arc melting technology to prepare high-purity rare earth gadolinium elementary substance |
| CN106350690A (en) * | 2015-07-17 | 2017-01-25 | 中国科学院物理研究所 | Rare earth gadolinium-based amorphous alloy stripe used for magnetic refrigerant material in room temperature range, and preparation method of rare earth gadolinium-based amorphous alloy stripe |
| CN106350690B (en) * | 2015-07-17 | 2018-06-26 | 中国科学院物理研究所 | Rare earth gadolinium-based AMORPHOUS ALLOY RIBBONS for room temperature magnetic refrigerating material and preparation method thereof |
| CN111321358A (en) * | 2020-04-17 | 2020-06-23 | 中国科学院物理研究所 | Amorphous alloy with spontaneous color change on surface, and preparation method and application thereof |
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