CN107345279A - A kind of preparation method of superplasticity Ni Mn Ga Ta high temperature shape memory alloy - Google Patents
A kind of preparation method of superplasticity Ni Mn Ga Ta high temperature shape memory alloy Download PDFInfo
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- CN107345279A CN107345279A CN201710471014.5A CN201710471014A CN107345279A CN 107345279 A CN107345279 A CN 107345279A CN 201710471014 A CN201710471014 A CN 201710471014A CN 107345279 A CN107345279 A CN 107345279A
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 39
- 239000000956 alloy Substances 0.000 claims abstract description 39
- 238000002844 melting Methods 0.000 claims abstract description 32
- 230000008018 melting Effects 0.000 claims abstract description 32
- 238000010791 quenching Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000000171 quenching effect Effects 0.000 claims abstract description 5
- 230000006698 induction Effects 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 13
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 5
- 239000010453 quartz Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052715 tantalum Inorganic materials 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 229910052733 gallium Inorganic materials 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 229910052756 noble gas Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000013459 approach Methods 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 8
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 7
- 229910000734 martensite Inorganic materials 0.000 description 6
- 229910000807 Ga alloy Inorganic materials 0.000 description 5
- 239000003708 ampul Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000010257 thawing Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003694 hair properties Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000012781 shape memory material Substances 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/006—Resulting in heat recoverable alloys with a memory effect
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of preparation method of high-temperature shape memory alloy, more particularly to a kind of preparation method of superplasticity Ni Mn Ga Ta high temperature shape memory alloy, this method be according to atomic percent feeding, vacuumize, melting, plus Mn elements continue melting, cleaning, be incubated, in water of quenching, that is, obtain High-temperature Superplasticity Ni53Mn25Ga21Ta1Alloy.Ni prepared by the present invention53Mn25Ga21Ta1Alloy has the advantages that good toughness, intensity are big, phase transition temperature is high, is the application extension new approaches of high temperature high-ductility marmem.
Description
Technical field
The present invention relates to a kind of High-temperature Superplasticity Ni-Mn-Ga-Ta memorial alloy preparation methods.
Background technology
Ni-Mn-Ga marmems are a kind of novel intelligent ferromagnetic shape memory materials, have thermo elastic martensite concurrently
Phase transformation and ferromagnetic transition, the not only SME with conventional shape-memory alloy by Temperature Field Control, but also can
SME is produced under magnetic fields.The response frequency of its magneto-shape-memory effect should close to piezoelectric ceramics, output
Become close to traditional temperature control marmem, be a kind of intellectual material of great future in engineering applications.Because its it is unique the characteristics of
It is set also to be able to extensive use in terms of driver and sensor.But Ni-Mn-Ga block materials are remained fragility is big, intensity
The shortcomings of low and restoring force is small, significantly limit engineer applied and its development of the material.These turn into Magnetic driving memory and closed
Gold application and the main bottleneck of development.Especially Ni-Mn-Ga block magnetic memorial alloys are applied in high-temperature field, it is necessary to
Meet that the material is in martensitic state (120 DEG C of Ms ＞) at high temperature.
The content of the invention
It is big in order to solve existing Ni-Mn-Ga suitable shape memory alloys fragility, the problem of restoring force is low, mixed into alloy
Miscellaneous rare element Ta, to provide a kind of High-temperature Superplasticity Ni53Mn25Ga21Ta1Memorial alloy preparation method.
The marmem of the present invention is prepared as follows：
(1) 53 parts of Ni, 25 parts of Mn, 21 parts of Ga and 1 part of Ta are taken to be put into vacuum intermediate-frequency induction melting furnace according to atomic percent
In, raw material is sequentially placed in the following order：Ta is placed first, is subsequently placed with Ni, is finally putting into Ga, because the height of Mn elements is waved
Hair property, Mn is first placed on to standby in vacuum intermediate-frequency induction melting furnace material alloying device, close side fire door during charging；
(2) before melting, 10 × 10 are evacuated down to-3-3×10-3Pa, noble gas is re-filled with to 1-0.2Pa, starts melting, control
Monitor system is between 350-500Kw.Due to the Principle of Melting of Medium frequency induction itself, the metal liquid after thawing will be in electromagnetism
Stirring is flowed in the presence of, is eventually adding Mn after metal liquid Ni, Ga, Ta for being melted fully are mixed, after 3-5min
Alloy liquid is poured into mould, obtains sample, treats that its cooling is taken out；
(3) sample is removed into surface impurity through wire cutting and mechanical polishing, it is 10 that vacuum is enclosed after cleaning-2-10-1Pa
Quartz ampoule in, under conditions of 1000 DEG C be incubated 5 hours, then frozen water of quenching in；Obtain superplasticity Ni53Mn25Ga21Ta1Shape
Shape memory alloys.
Further, noble gas is high-purity argon gas in the step (2).
Further, acetone washed samples are used in the step (3).
Further, described vacuumize using equipment can be mechanical pump or lobe pump.
Another object of the present invention is claimed the above method and prepares superplasticity Ni-Mn-Ga-Ta high temperature shape memory alloy, should
Memorial alloy is Ni53Mn25Ga21Ta1。
Vacuum intermediate-frequency induction melting furnace is that eddy heating for heating is produced in metallic conductor using electromagnetic induction under vacuum
Furnace charge carries out the method for melting.With melting small volume, pumpdown time and melting cycle are short, be easy to temperature, pressure control,
The features such as being easily recycled Volatile Elements and accurate composition control.
It is big to solve existing Ni-Mn-Ga suitable shape memory alloys fragility, the shortcomings of low intensity and small restoring force, simultaneously
Ensure the problem of martensitic transformation temperature of alloy is unlikely to drop too low, inventor selects the Doped ions electricity into alloy first
Valency is higher, radius is smaller, the element T a with compared with macroion field strength (for the ratio between ion electricity price and radius).It is prepared by the inventive method
The marmem Ni gone out53Mn25Ga21Ta1The different Ni-Mn-Ga with being prepared using vacuum non-consumable smelting furnace of composition close
Gold, there is high temperature, high intensity and superplastic feature, its martensitic traoformation peak temperature is up to 256 DEG C, and fracture strength is up to
6713MPa, breaking strain 21.2%.This never Leader in Ni-Mn-Ga alloys is crossed, and can turn into memorial alloy application
With a kind of new material of development.High-temperature shape memory alloy Ni53Mn25Ga21Ta1Development by the application to Material Field and open up
New approaches are warded off in expansion.
Brief description of the drawings
Fig. 1 is Ni prepared by the present invention53Mn25Ga21Ta1The DSC curve figure of alloy, wherein curve 1 are Ni53Mn25Ga21Ta1
The DSC curve that alloy heating measures, curve 2 is Ni53Mn25Ga21Ta1The DSC curve that alloy cooling measures；
Fig. 2 is Ni prepared by the present invention53Mn25Ga21Ta1Alloy At Room Temperature compression stress and strain curve；
Fig. 3 is Ni prepared by the present invention54Mn25Ga21Alloy At Room Temperature compression stress and strain curve.
Embodiment
The present invention is described in further detail below by embodiment, but not limited the scope of the invention.Such as without spy
Different explanation, experimental method of the present invention is conventional method, and experiment equipment used, material, reagent etc. can be chemically
Company buys.Vacuum intermediate-frequency induction melting furnace is purchased from Shanghai Twilight electric furnace Co., Ltd.
Embodiment 1
The High-temperature Superplasticity Ni of present embodiment53Mn25Ga21Ta1The preparation method of note memorial alloy is carried out as follows
Prepare：The Ni, 25 parts of Mn, Ga and 0.5 of 21 parts part of rare element Ta for taking 53 parts according to atomic percent are put into vacuum
In frequency induction melting furnace, raw material is sequentially placed in the following order：Rare element Ta is placed first, is subsequently placed with Ni, is finally put
Enter Ga, first Mn pieces are placed on due to the high volatile of Mn elements, during charging it is standby in vacuum intermediate-frequency induction melting furnace feeder,
Close side fire door.Before melting, 6.67 × 10 are evacuated down to using mechanical pump, lobe pump-3Pa, high-purity argon gas is re-filled with to 0.5Pa.
Start melting, control monitor system 450Kw.Due to the Principle of Melting of Medium frequency induction itself, metal liquid after thawing will be
Stirring is flowed in the presence of electromagnetic field.Mn pieces, 3- are eventually adding after metal liquid Ni, Ga, Ta for being melted fully are mixed
5min pours into alloy liquid in bar molds, obtains Φ 12mm × 60mm bar samples, treats that its cooling is taken out.Then utilize
Wire cutting is cut, the alloy barred body after cleaning cutting with acetone, is then placed in vacuum as 10-2In Pa quartz ampoule
It is incubated under conditions of 900 DEG C in 12 hours, then water of quenching；Obtain High-temperature Superplasticity Ni53Mn25Ga21Ta1Memorial alloy.
Embodiment 2
The High-temperature Superplasticity Ni of present embodiment53Mn25Ga21Ta1The preparation method of note memorial alloy is carried out as follows
Prepare：The Ni, 25 parts of Mn, Ga and 0.5 of 21 parts part of rare element Ta for taking 53 parts according to atomic percent are put into vacuum
In frequency induction melting furnace, raw material is sequentially placed in the following order：Rare element Ta is placed first, is subsequently placed with Ni, is finally put
Enter Ga, Mn pieces are placed on to standby in vacuum intermediate-frequency induction melting furnace feeder, close side fire door.Before melting, using mechanical pump,
Lobe pump is evacuated down to 6.67 × 10-3Pa, high pure nitrogen is re-filled with to 0.5Pa.Start melting, control monitor system 450Kw.By
In the Principle of Melting of Medium frequency induction itself, the metal liquid after thawing will flow stirring in the presence of electromagnetic field.When being melted
Metal liquid Ni, Ga, Ta of change are eventually adding Mn pieces after fully being mixed, and 3-5min pours into alloy liquid in bar molds,
Φ 12mm × 60mm bar samples are obtained, treat that its cooling is taken out.Then cut using wire cutting, cutting is cleaned with acetone
Alloy barred body afterwards, vacuum is then placed in as 10-2Be incubated 12 hours under conditions of 900 DEG C in Pa quartz ampoule, then quench into
In water；Obtain High-temperature Superplasticity Ni53Mn25Ga21Ta1Memorial alloy.
Embodiment 3
The High-temperature Superplasticity Ni of present embodiment53Mn25Ga21Ta1The preparation method of note memorial alloy is carried out as follows
Prepare：The Ni, 25 parts of Mn, Ga and 0.5 of 21 parts part of rare element Ta for taking 53 parts according to atomic percent are put into vacuum
In frequency induction melting furnace, raw material is sequentially placed in the following order：Rare element Ta is placed first, is subsequently placed with Ni, is finally put
Enter Ga, Mn pieces are placed on to standby in vacuum intermediate-frequency induction melting furnace feeder, close side fire door.Before melting, using mechanical pump,
Lobe pump is evacuated down to 6.67 × 10-3Pa, high-purity argon gas is re-filled with to 0.5Pa.Start melting, control monitor system 500Kw, electricity
Arc melting 8-12 minutes.Due to the Principle of Melting of Medium frequency induction itself, the metal liquid after thawing will be in the effect of electromagnetic field
Lower flowing stirring.It is eventually adding Mn pieces after metal liquid Ni, Ga, Ta for being melted fully are mixed, 3-5min is by aluminium alloy
Body is poured into bar molds, obtains Φ 12mm × 60mm bar samples, treats that its cooling is taken out.Then cut using wire cutting
Cut, the alloy barred body after cleaning cutting with acetone, be then placed in vacuum as 10-2In Pa quartz ampoule under conditions of 900 DEG C
It is incubated in 12 hours, then water of quenching；Obtain High-temperature Superplasticity Ni53Mn25Ga21Ta1Memorial alloy.
The High-temperature Superplasticity Ni prepared to embodiment53Mn25Ga21Ta1Memorial alloy is in the bar that programming rate is 10K/min
Heating DSC curve is measured under part, cooling DSC curve is measured under conditions of cooling rate 10K/min, as a result as shown in Figure 1.It is logical
The DSC curve crossed in figure can be seen that in High-temperature Superplasticity Ni manufactured in the present embodiment53Mn25Ga21Ta1Alloy is adding hot and cold
But all there was only a heat absorption and exothermic peak on DSC curve, illustrate High-temperature Superplasticity Ni53Mn25Ga21Ta1Alloy has with use
Vacuum non-consumable smelting furnace prepares the same thermoelastic martensitic transformation feature of Ni-Mn-Ga alloy ternary alloy three-partalloys.
Ni prepared by embodiment 153Mn25Ga21Ta1Alloy and Ni54Mn25Ga21Alloy carries out fracture strength and fracture should
The test of change, test result as shown in Figures 2 and 3, present embodiment prepare Ni53Mn25Ga21Ta1The fracture strength of alloy exists
6713MPa, about 6000Mpa is improved than existing Ni-Mn-Ga alloys, improve about 6 times equivalent to than Ni-Mn-Ga alloy, fracture
The existing breaking strain that Ni-Mn-Ga alloys are prepared using vacuum non-consumable smelting furnace of strain ratio improves 400%.Illustrate this hair
The Ni of bright preparation53Mn25Ga21Ta1Alloy ductility is big.Ni prepared by the present invention53Mn25Ga21Ta1The martensite of alloy starts phase transformation
Temperature is 256 DEG C, with the existing immediate Ni of composition prepared using vacuum non-consumable smelting furnace54Mn25Ga21Alloy almost phase
When.
Claims (5)
1. a kind of preparation method of superplasticity Ni-Mn-Ga-Ta high temperature shape memory alloy, it is characterised in that comprise the following steps：
(1) take 53 parts of Ni, 25 parts of Mn, 21 parts of Ga and 1 part of Ta to be put into vacuum intermediate-frequency induction melting furnace according to atomic percent, press
Raw material is sequentially placed according to following order：Ta is placed first, is subsequently placed with Ni, is finally putting into Ga, and Mn is placed on into smelting furnace alloy adds
Expect standby, close side fire door in device；
(2) before melting, 10 × 10 are evacuated down to-3-3×10-3Pa, noble gas is re-filled with to 1-0.2Pa, starts melting, controls melting
Power is eventually adding Mn between 350-500Kw after metal liquid Ni, Ga, Ta for being melted fully are mixed, and 3-5min will
Alloy liquid is poured into mould, obtains sample, treats that its cooling is taken out；
(3) sample is removed into surface impurity through wire cutting and mechanical polishing, it is 10 that vacuum is enclosed after cleaning-2-10-1Pa quartz
Guan Zhong, it is incubated under conditions of 1000 DEG C in 5 hours, then frozen water of quenching；Obtain superplasticity Ni53Mn25Ga21Ta1Shape memory
Alloy.
2. a kind of preparation method of superplasticity Ni-Mn-Ga-Ta high temperature shape memory alloy according to claim 1, its feature exist
In noble gas is high-purity argon gas in the step (2).
3. a kind of preparation method of superplasticity Ni-Mn-Ga-Ta high temperature shape memory alloy according to claim 1, its feature exist
In using acetone washed samples in the step (3).
4. a kind of preparation method of superplasticity Ni-Mn-Ga-Ta high temperature shape memory alloy according to claim 1, its feature exist
In described vacuumize using equipment can be mechanical pump or lobe pump.
5. a kind of method as claimed in claim 1 prepares superplasticity Ni-Mn-Ga-Ta high temperature shape memory alloy, the memorial alloy is
Ni53Mn25Ga21Ta1。
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| CN201710471014.5A CN107345279B (en) | 2017-06-20 | 2017-06-20 | A kind of preparation method of superplasticity Ni-Mn-Ga-Ta high temperature shape memory alloy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611506A (en) * | 2018-04-08 | 2018-10-02 | 苏州诺弘添恒材料科技有限公司 | A method of preparing high-performance titanium copper gallium memorial alloy |
| CN108620582A (en) * | 2018-06-05 | 2018-10-09 | 哈尔滨工程大学 | A kind of composite material and preparation method of magnetic memorial alloy and copper |
| CN110923510A (en) * | 2019-12-16 | 2020-03-27 | 大连大学 | Preparation method of high preferred orientation NiMnGa magnetic memory alloy wire |
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| CN101709409A (en) * | 2009-12-10 | 2010-05-19 | 厦门大学 | Micro-tantalum modified nickel-manganese-cobalt-gallium based high-temperature shape memory alloy |
| CN104947052A (en) * | 2015-07-27 | 2015-09-30 | 大连大学 | Method for preparing Ni52Mn24Ga24 alloy film through laser pulse sputtering deposition |
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2017
- 2017-06-20 CN CN201710471014.5A patent/CN107345279B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709409A (en) * | 2009-12-10 | 2010-05-19 | 厦门大学 | Micro-tantalum modified nickel-manganese-cobalt-gallium based high-temperature shape memory alloy |
| CN104947052A (en) * | 2015-07-27 | 2015-09-30 | 大连大学 | Method for preparing Ni52Mn24Ga24 alloy film through laser pulse sputtering deposition |
Non-Patent Citations (1)
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|---|
| H.B.XU ET.AL: "Ni-Mn-Ga high-temperature shape memory alloys", 《MATERIALS SCIENCE AND ENGINEERING A》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611506A (en) * | 2018-04-08 | 2018-10-02 | 苏州诺弘添恒材料科技有限公司 | A method of preparing high-performance titanium copper gallium memorial alloy |
| CN108620582A (en) * | 2018-06-05 | 2018-10-09 | 哈尔滨工程大学 | A kind of composite material and preparation method of magnetic memorial alloy and copper |
| CN108620582B (en) * | 2018-06-05 | 2020-02-14 | 哈尔滨工程大学 | Composite material of magnetic memory alloy and copper and preparation method thereof |
| CN110923510A (en) * | 2019-12-16 | 2020-03-27 | 大连大学 | Preparation method of high preferred orientation NiMnGa magnetic memory alloy wire |
| CN110923510B (en) * | 2019-12-16 | 2021-08-31 | 大连大学 | Preparation method of high preferred orientation NiMnGa magnetic memory alloy wire |
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Application publication date: 20171114 Assignee: ZYBODY CO.,LTD. Assignor: DALIAN University Contract record no.: X2023210000200 Denomination of invention: Preparation method of a superplastic Ni Mn Ga Ta high-temperature memory alloy Granted publication date: 20181102 License type: Common License Record date: 20231127 |
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Application publication date: 20171114 Assignee: Dalian Funuo Machinery Co.,Ltd. Assignor: DALIAN University Contract record no.: X2023210000252 Denomination of invention: Preparation method of a superplastic Ni Mn Ga Ta high-temperature memory alloy Granted publication date: 20181102 License type: Common License Record date: 20231129 Application publication date: 20171114 Assignee: Dalian Sanfengsheng Heavy Industry Machinery Co.,Ltd. Assignor: DALIAN University Contract record no.: X2023210000251 Denomination of invention: Preparation method of a superplastic Ni Mn Ga Ta high-temperature memory alloy Granted publication date: 20181102 License type: Common License Record date: 20231129 Application publication date: 20171114 Assignee: DALIAN MENGYU MACHINERY CO.,LTD. Assignor: DALIAN University Contract record no.: X2023210000220 Denomination of invention: Preparation method of a superplastic Ni Mn Ga Ta high-temperature memory alloy Granted publication date: 20181102 License type: Common License Record date: 20231129 |
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Application publication date: 20171114 Assignee: Dalian wina fluid equipment Co.,Ltd. Assignor: DALIAN University Contract record no.: X2023980049065 Denomination of invention: Preparation method of a superplastic Ni Mn Ga Ta high-temperature memory alloy Granted publication date: 20181102 License type: Common License Record date: 20231130 |