CN109022864A - A kind of method of combustion reaction high―temperature nuclei NiMnGaCo Magnetic Memory alloy - Google Patents
A kind of method of combustion reaction high―temperature nuclei NiMnGaCo Magnetic Memory alloy Download PDFInfo
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- CN109022864A CN109022864A CN201810871967.5A CN201810871967A CN109022864A CN 109022864 A CN109022864 A CN 109022864A CN 201810871967 A CN201810871967 A CN 201810871967A CN 109022864 A CN109022864 A CN 109022864A
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 9
- 238000005245 sintering Methods 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 39
- 238000002791 soaking Methods 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 34
- 239000000956 alloy Substances 0.000 abstract description 34
- 238000002360 preparation method Methods 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 description 15
- 229910000807 Ga alloy Inorganic materials 0.000 description 6
- 238000011160 research Methods 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052733 gallium Inorganic materials 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000003446 memory effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910003310 Ni-Al Inorganic materials 0.000 description 1
- 229910018102 Ni-Mn-Al Inorganic materials 0.000 description 1
- 229910005408 Ni2MnGa Inorganic materials 0.000 description 1
- 229910018548 Ni—Mn—Al Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002524 electron diffraction data Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0433—Nickel- or cobalt-based alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/005—Alloys based on nickel or cobalt with Manganese as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
Abstract
A kind of method of combustion reaction high―temperature nuclei NiMnGaCo Magnetic Memory alloy, it is related to a kind of preparation method of magnetic shape memory alloy.The present invention uses combustion reaction to synthesize a kind of novel magnetic shape NiMnGaCo memorial alloy for the first time, the thinking that has been the application extension of high temperature high-ductility marmem.High-strength, high-ductility NiMnGaCo of the invention is prepared as follows: according to atomic percent feeding, mixing, sintering to get to high-intensitive high-strength, high-ductility NiMnGaCo.Magnetic shape memory alloy NiMnGaCo prepared by the present invention has many advantages, such as that good toughness, intensity is big, fine microstructures.
Description
Technical field
The present invention relates to a kind of methods of combustion reaction high―temperature nuclei NiMnGaCo Magnetic Memory alloy.
Background technique
Magnetically driven shape memory alloy has both response frequency height and exports the advantages of should becoming larger, in recent years by height weight
Depending on.Magnetic driving shape memory effect is had found in many alloys at present, specifically includes that Ni-Mn-Ga, Ni-Fe-Ga, Fe-Pd,
Fe-Pt, Ni-Mn-Al, Co-Ni-Ga, Co-Ni-Al and Ni-Mn-X (X=In, Sn, Sb) alloy etc..Wherein Ni-Mn-Ga is
It was found that the earliest and maximum magnetically driven shape memory alloy of application potential.
1996, Ullakko et al. was for the first time in Ni2The reversible strain that about 0.2% is obtained in MnGa monocrystalline, is pulled open since then
The research prelude of magnetic driven memory alloy, has become the research hotspot in marmem field.Domestic and international researcher is successive
Carry out magnetic driven memory alloy research, designs and prepares in alloy, the life of martensitic traoformation, mechanical behavior, magnetism characteristic, magnetic strength is answered
Change and its micromechanism etc. have made great progress.Chinese Academy of Sciences's CAS Institute of Physics in free sample, (answer by no applied stress or pre-add
Power) Ni52Mn24Ga24In obtain up to 1.2% merely by the magnetic-field-induced strain of induced by magnetic field.2000, Murray et al. existed
Ni47.4Mn32.1Ga20.55.7% magnetic-field-induced strain is obtained in monotropic body 5M martensite.2002, Sozinov et al. was having
There is the Ni of 7M martensitic structure48.8Mn29.7Ga21.5In monocrystalline, under 1T magnetic fields, the magnetic strength life for obtaining up to 9.5% is answered
Become, this is presently found maximum magnetic-field-induced strain.But when the preparation of Ni-Mn-Ga monocrystal material as caused by the effect of segregation
Component segregation, it is difficult to the uniform monocrystal material of large scale ingredient is obtained, and quality repeatability and stability are poor, it is at high cost.For this purpose,
People have invested polycrystalline Ni-Mn-Ga alloy for sight is studied.Ullakko et al. is in Ni49.6Mn28.4Ga22It is obtained in polycrystalline alloy
0.3% magnetic-field-induced strain, and the martensite of preferred orientation is obtained with the method for thermomechanical cycle, magnetic-field-induced strain is mentioned
Up to 4%.The study found that Ni-Mn-Ga alloy brittleness is larger, polycrystalline is more crisp than monocrystalline, has taken a variety of method for toughening,
Including addition Fe and rare earth element and powder metallurgy refinement crystal grain etc., Ni-Mn-Ga polycrystalline brittleness is improved.Wang
Et al. made under the conditions of operating pressure 80MPa, sintering temperature 1173K, sintering time 600s using discharge plasma sintering technique
For Ni2MnGa alloy, compression failure strain is up to 24%, much higher than the identical component alloy (closely having 8%) of fusion casting preparation.
In short, driving memorial alloy, the research of especially Ni-Mn-Ga alloy achieves considerable by the effort in more than 20 years
Progress, but there are still one to restrict its development and application critical issue-polycrystalline brittleness problems.Therefore, exploring improves Ni-
The polycrystalline brittleness of Mn-Ga alloy is one of important development direction and the research emphasis in magnetic driven memory alloy field.
Ni-Mn-Ga alloy brittleness is big, and machining property is poor, in typically along brilliant crisp after being broken under stress
Property fracture.View more consistent for intrinsic brittleness at present is: due to the atomic size of component alloy, chemical valence and other
Difference in relation to chemical property and be formed about uneven environment in crystal boundary, caused by keeping crystal boundary binding force lower.Meanwhile
This ordered intermetallic compound ordering energy with higher, the movement of crystal boundary atom is smaller, so that the atom of grain boundaries can be considered
The atomic arrangement of crystal boundary side or the atomic arrangement for belonging to the other side, columnar voids caused by the mispairing of this crystal boundary two sides cause
The brittleness of crystal boundary；In addition, unit-cell volume is larger so that dislocation motion Bai Shi vector becomes larger, independent slip-system is few, and crystal boundary
Special construction cause sliding not easily pass through crystal boundary and alloy have it is intrinsic along brilliant brittleness the reason of.Domestic and foreign scholars pass through big
Measuring work improves the plasticity of Ni-Mn-Ga alloy, improves its toughness, but not yet explore better solution.
Summary of the invention
In order to solve the problems, such as that existing NiMnGa series Magnetic Memory alloy brittleness is big, machining property is poor, the present invention
A kind of method of combustion reaction high―temperature nuclei NiMnGaCo Magnetic Memory alloy is provided, inventive concept of the invention is: using carefully
Crystalline substance is strengthened and alloying significantly changes alloy transformation temperature and improves its mechanical performance and physical property, mixes in NiMnGa alloy
Miscellaneous suitable Co element, then alloy mechanical property is improved by combustion reaction high―temperature nuclei NiMnGaCo Magnetic Memory alloy and is changed
Kind shape memory effect.
The present invention adopts the following technical scheme that, a kind of method of combustion reaction high―temperature nuclei NiMnGaCo Magnetic Memory alloy:
46-50 parts of Ni powder, 25 parts of Mn powder, 25 parts of Ga powder are taken according to atomic percent, 1-4 parts of Co powder are mixed equal by blender
It is even, it is then poured into pressure forming die, is pressed with jack pair mold, powder is pressed into cylindrical sample, then
Sample is placed in specific fixture, applies certain pressure and clamps, the fixture for clamping sample is finally put into chamber type electric resistance furnace
In be sintered, the temperature of resistance furnace is 1000-1200 DEG C of heat preservation 20-40 minutes, then cool to the furnace room temperature take out to get
To NiMnGaCo Magnetic Memory alloy.
The fixture includes upper and lower two pressure plares, and the both ends of pressure plare are fixed with bolt or screw.When work, pass through
Bolt or screw adjust the distance between upper and lower pressure plare, and sample is placed in the space formed between upper and lower pressure plare,
The surface of sample is set to be in contact with pressure plare, the both ends of fixation pressure plate press to fixture.
Further, Ni powder, Mn powder, Ga powder and Co powder diameter are 5 microns.
Further, turned in blender with speed 200 turns/min-500/min stirs metal powder, keep its mixing equal
It is even.
Further, it is pressed with jack pair mold, by being pressurized under 400-1000MPa pressure and pressure maintaining 2-4 minutes
By powder be pressed into diameter be 10mm, highly be 10mm cylindrical sample.
Further, NiMnGaCo Magnetic Memory alloy partial size is 20-30 microns.
Further, chamber type electric resistance furnace sintering temperature is 1200 DEG C, soaking time 30 minutes.
The marmem NiMnGaCo that the method for the present invention is prepared is different from existing smelting furnace melting preparation
Magnetic shape memory alloy NiMnGaCo, and have the advantage that by comparison
1, NiMnGaCo alloy fracture intensity prepared by the present invention improves about in 7400Mpa than existing NiMnGaCo alloy
For 6800Mpa；
2, the breaking strain of alloy prepared by the present invention is 16.6%, and the breaking strain than existing NiMnGaCo alloy improves
6.6%, illustrate that NiMnGaCo alloy ductility prepared by the present invention is big.
3, the crystallite dimension of NiMnGaCo alloy prepared by the present invention significantly reduces, and about 20-30 microns of diameter, NiMnGaCo
The fine microstructures of alloy.
4, the phase transition temperature of NiMnGaCo alloy prepared by the present invention is about 62 DEG C.
Detailed description of the invention
Fig. 1 is the survey that high-strength, high-ductility NiMnGaCo alloy prepared by embodiment 1 carries out breaking strength and breaking strain
Try curve graph.
Fig. 2 is the DSC curve of NiMnGaCo alloy prepared by embodiment 2；
Fig. 3 is high-strength, high-ductility the NiMnGaCo alloy of the preparation of embodiment 1 in optical microscope photograph at room temperature.
Room temperature transmission electron microscopy phase and corresponding electron diffraction pattern of the Fig. 4 for the NiMnGaCo alloy of embodiment 1,
Middle a is fracture apperance, and b is the enlarged drawing of a.
Specific embodiment
The present invention is described in detail below by specific embodiment, but is not limited the scope of the invention.Unless otherwise specified, originally
Experimental method used by inventing is conventional method, and experiment equipment used, material, reagent etc. commercially obtain.
Press machine involved in following embodiments is YLJ-303 type micro pressure machine (JA2003N), chamber type electric resistance furnace SXZ-10-12
Chamber type electric resistance furnace.
Embodiment 1
High-strength, high-ductility NiMnGaCo Magnetic Memory alloy the preparation method of the present embodiment is prepared as follows:
Taking partial size according to atomic percent is that 5 microns of 46 parts of Ni powder, 25 parts of Mn powder, 25 parts of Ga powder and 4 parts of Co powder mix,
Metal powder is stirred according to 200 turns/min-500 of speed turns/min in blender, it is uniformly mixed, is then poured into pressure
It in power molding die, is pressed with jack pair mold, by being pressurized under 400-1000MPa pressure and pressure maintaining 2-4 minutes by powder
End is pressed into diameter and is 10mm, is highly the cylindrical sample of 10mm, finally at 1000-1200 DEG C of temperature, soaking time 20-
Sintering process sintering in 40 minutes, finally obtains the NiMnGaCo Magnetic Memory alloy that partial size is 20-30 microns.
Embodiment 2
High-strength, high-ductility NiMnGaCo Magnetic Memory alloy the preparation method of the present embodiment is prepared as follows:
Taking partial size according to atomic percent is that 5 microns of 50 parts of Ni powder, 25 parts of Mn powder, 25 parts of Ga powder and 1 part of Co powder mix,
Metal powder is stirred according to 200 turns/min-500 of speed turns/min in blender, it is uniformly mixed, is then poured into pressure
It in power molding die, is pressed with jack pair mold, by being pressurized under 400-1000MPa pressure and pressure maintaining 2-4 minutes by powder
End is pressed into diameter and is 10mm, is highly the cylindrical sample of 10mm, finally at 1000-1200 DEG C of temperature, soaking time 30
Minute sintering process sintering, finally obtains the NiMnIn Magnetic Memory alloy that partial size is 20-30 microns.
Embodiment 3
High-strength, high-ductility NiMnGaCo Magnetic Memory alloy the preparation method of the present embodiment is prepared as follows:
Taking partial size according to atomic percent is 5 microns 47 parts of Ni powder, 25 parts of Mn powder, 25 parts of Ga powder and the mixing of 3 parts of Co powder, is being stirred
It mixes in device and stirs metal powder according to 200 turns/min-500 of speed turns/min, be uniformly mixed it, be then poured into pressure
It in molding die, is pressed with jack pair mold, by being pressurized under 400-1000MPa pressure and pressure maintaining 2-4 minutes by powder
It is pressed into diameter to be 10mm, be highly the cylindrical sample of 10mm, finally at 1200 DEG C of temperature, soaking time is 20-40 minutes
Sintering process sintering finally obtains the NiMnGaCo Magnetic Memory alloy that partial size is 20-30 microns.
High-strength, high-ductility NiMnGaCo alloy prepared by embodiment 1 carries out the test of breaking strength and breaking strain,
Test results are shown in figure 1.Test results are shown in figure 2 by the DSC of the alloy of obtained NiMnGaCo in embodiment 2；This reality
The breaking strength for applying the NiMnGaCo alloy of example preparation improves about 6800MPa than the NiMnGaCo alloy of smelting furnace melting, breaks
It splits strain and improves about 0.5 times or more than NiMnGa.
High-strength, high-ductility NiMnGaCo alloy prepared by embodiment 1 is carrying out structure observation analysis, knot at room temperature
Fruit is as shown in Figure 3.It is tiny in the NiMnGaCo alloy grain of present embodiment preparation as seen in Figure 3, therefore risen at this
The effect of crystal grain refinement is arrived.
High-strength, high-ductility NiMnGaCo alloy prepared by embodiment 1 carries out the test of breaking strength and breaking strain
Analysis on Mechanism is carried out to it afterwards, fracture apperance is as shown in figure 4, from a figure it can be seen that there is a large amount of dimple in fracture, almost
It can not see cavity, illustrate that the consistency of alloy at this time is higher.In addition, can clearly see one from figure almost through section
Crackle, in other directions, there are also some small crackle presence.B figure is the amplification fracture apperance in the area A, can be obviously from b figure
Clear crystal boundary, and be tightly combined between local crystal boundary, show good binding force；But there is also combine not between the crystal boundary of part
Closely, there are certain gaps, it may also be seen that the smooth crystal face of crystal grain is locally present, thus weaken alloy
Mechanical property.There is certain sliding trace in partial region simultaneously, and intra-die illustrates to close at this time with certain tear trace
Gold has a certain amount of cleavage fracture and the grain boundary fracture as caused by the defect of material preparation introduction based on ductile rupture.
The preferable specific embodiment of the above, only the invention, but the protection scope of the invention is not
It is confined to this, anyone skilled in the art is in the technical scope that the invention discloses, according to the present invention
The technical solution of creation and its inventive concept are subject to equivalent substitution or change, should all cover the invention protection scope it
It is interior.
Claims (5)
1. a kind of method of combustion reaction high―temperature nuclei NiMnGaCo Magnetic Memory alloy, which is characterized in that according to atomic percent
46-50 parts of Ni powder, 25 parts of Mn powder, 25 parts of Ga powder are taken, 1-4 parts of Co powder are uniformly mixed by blender, are then poured into
In pressure forming die, is pressed with jack pair mold, powder is pressed into cylindrical sample, sample is then placed in fixture
In, it is pressurized to 400-1000MPa clamping, pressure maintaining 2-4 minutes, finally the fixture for clamping sample is put into chamber type electric resistance furnace and is carried out
Sintering, the temperature of resistance furnace is 1000-1200 DEG C of heat preservation 20-40 minutes, then cools to room temperature with the furnace and takes out to get arriving
NiMnGaCo Magnetic Memory alloy.
2. the method according to claim 1, wherein Ni powder, Mn powder, Ga powder and Co powder diameter are 5 microns.
3. the method according to claim 1, wherein the mixing speed in blender is 200 turns/min-500
Turn/min.
4. being 10mm, being highly the method according to claim 1, wherein powder is pressed into diameter after pressurization
The cylindrical sample of 10mm.
5. the method according to claim 1, wherein chamber type electric resistance furnace sintering temperature be 1200 DEG C, soaking time
30 minutes.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113684389A (en) * | 2021-08-16 | 2021-11-23 | 大连大学 | Method for improving superelasticity of Co-Ni-Al magnetic memory alloy by controlling gamma phase distribution |
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| US20020098105A1 (en) * | 2001-01-24 | 2002-07-25 | Scimed Life Systems, Inc. | The processing of particulate Ni-Ti alloy to achieve desired shape and properties |
| CN104711471A (en) * | 2015-04-02 | 2015-06-17 | 中国科学院宁波材料技术与工程研究所 | Method for preparing NiMnX alloy target |
| CN107142389A (en) * | 2017-05-04 | 2017-09-08 | 大连大学 | High-strength, the high-ductility Ni of one kind50Mn34In16‑xCoxThe preparation method of Magnetic Memory alloy |
| CN108060330A (en) * | 2017-12-25 | 2018-05-22 | 大连大学 | It is a kind of to inhibit the preparation method of the Ni-Mn-Ga memorial alloys of γ Phase Proportions by powder sintered |
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2018
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020098105A1 (en) * | 2001-01-24 | 2002-07-25 | Scimed Life Systems, Inc. | The processing of particulate Ni-Ti alloy to achieve desired shape and properties |
| CN104711471A (en) * | 2015-04-02 | 2015-06-17 | 中国科学院宁波材料技术与工程研究所 | Method for preparing NiMnX alloy target |
| CN107142389A (en) * | 2017-05-04 | 2017-09-08 | 大连大学 | High-strength, the high-ductility Ni of one kind50Mn34In16‑xCoxThe preparation method of Magnetic Memory alloy |
| CN108060330A (en) * | 2017-12-25 | 2018-05-22 | 大连大学 | It is a kind of to inhibit the preparation method of the Ni-Mn-Ga memorial alloys of γ Phase Proportions by powder sintered |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113684389A (en) * | 2021-08-16 | 2021-11-23 | 大连大学 | Method for improving superelasticity of Co-Ni-Al magnetic memory alloy by controlling gamma phase distribution |
| CN113684389B (en) * | 2021-08-16 | 2022-07-29 | 大连大学 | Method for improving superelasticity of Co-Ni-Al magnetic memory alloy by controlling gamma phase distribution |
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