CN101705409A - High-temperature magnetic shape memory alloy and preparation method thereof - Google Patents
High-temperature magnetic shape memory alloy and preparation method thereof Download PDFInfo
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- CN101705409A CN101705409A CN200910219909A CN200910219909A CN101705409A CN 101705409 A CN101705409 A CN 101705409A CN 200910219909 A CN200910219909 A CN 200910219909A CN 200910219909 A CN200910219909 A CN 200910219909A CN 101705409 A CN101705409 A CN 101705409A
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Abstract
The invention relates to a high-temperature magnetic shape memory alloy and a preparation method thereof. The memory alloy contains chemical components in ratios of mole fraction as follows: 50 parts of Ga, 25 parts of Mn and 25 parts of Ni; martensite phase transformation temperature is 780K, and Curie temperature is 340K. The preparation method comprises the following steps: taking and putting 50 parts of Ga, 25 parts of Mn and 25 parts of Ni according to mole fraction into a vacuum nonconsumable electrode arc furnace, conducting arc melting for 10 to 15 minutes at the temperature of 1500 to 1700 DEG C under the protection of inert gas, and then using acetone to wash a smelted metal block; subsequently, putting the metal block in a quartz tube with vacuum degree of 10 to 1Pa to conduct heat preservation for 60 hours at the temperature of 650 DEG C, and then conducting hardening, thus obtaining the high-temperature magnetic shape memory alloy Ga2MnNi. Compared with the existing alloy Ni2MnGa, martensite phase transformation temperature of the high-temperature magnetic shape memory alloy is higher by 220K, and Curie temperature thereof is the same.
Description
Technical field
The present invention relates to shape memory alloy, relate in particular to a kind of high-temperature magnetic shape memory alloy and preparation method thereof.
Background technology
Ferromagnetic shape memory alloy is (as Ni
2MnGa) generally have strong ferromegnetism, big magnetic-field-induced strain, temperature control and magnetic control shape memory effect.But because its martensitic transformation temperature is on the low side, thereby seriously restricted its application.
Summary of the invention
In view of existing in prior technology the problems referred to above, the present invention aims to provide novel material of a kind of memorial alloy and preparation method thereof, and it has higher martensitic transformation temperature, will open up a new road to the application and the expansion of material.
Technical solution of the present invention is achieved in that
A kind of high-temperature magnetic shape memory alloy is characterized in that:
Its chemical constitution is 50 parts of Ga, 25 parts of Mn, 25 parts of Ni by the mole portion rate;
Its martensitic transformation temperature is 780K, and Curie temperature is 340K.
The preparation method of described high-temperature magnetic shape memory alloy comprises following processing step:
Put into the vacuum non-consumable electrode electric arc furnace according to molfraction than the Ga, 25 parts Mn, 25 parts the Ni that get 50 parts, under protection of inert gas, arc melting is 10～15 minutes under 1500～1700 ℃ condition, uses the metal blocks after the acetone wash heat again; Putting into vacuum tightness then is 10
-1Under 650 ℃ condition, be incubated 60 hours in the silica tube of Pa, in the entry of quenching again; Promptly obtain high-temperature magnetic shape memory alloy Ga
2MnNi.
Described rare gas element is a kind of in argon gas, helium, neon or the xenon.
The high-temperature magnetic shape memory alloy Ga that the inventive method is prepared
2The composition of MnNi is different from existing magnetic shape memory alloy Ni
2MnGa has the following advantages by comparison:
High temperature ferromagnetism shape memory alloy Ga of the present invention
2MnNi not only has the shape memory effect that the conventional shape-memory alloy is subjected to Temperature Field Control, can produce shape memory effect under the action of a magnetic field, and at room temperature promptly have ferromegnetism and shape memory function; Simultaneously, its martensitic transformation temperature is up to 780K, than existing Ni
2The MnGa alloy exceeds 220K; Curie temperature is 340K, with existing Ni
2The Curie temperature of MnGa alloy is the same.Because high-temperature shape memory alloy is used widely in all trades and professions of national economy, so high-temperature shape memory alloy Ga disclosed in this invention
2The development of MnNi will be opened up a new road to the application and the expansion of memory alloy material.
Description of drawings
Fig. 1 is the prepared Ga of embodiment
2The DSC graphic representation of MnNi alloy, wherein curve 1 is described Ga
2The DSC curve that the heating of MnNi alloy records, curve 2 is described Ga
2The DSC curve that the cooling of MnNi alloy records;
Fig. 2 is the prepared Ga of embodiment
2The ac magnetization curve of MnNi alloy, wherein curve 1 is described Ga
2The temperature lowering curve of MnNi alloy, curve 2 is described Ga
2The heating curve of MnNi alloy.
Embodiment
Put into the vacuum non-consumable electrode electric arc furnace according to molfraction than the Ga, 25 parts Mn, 25 parts the Ni that get 50 parts; under protection of inert gas; arc melting is 10～15 minutes under 1550～1650 ℃ the condition, uses the metal blocks after the acetone wash heat again, and putting into vacuum tightness then is 10
-1Under the condition of 923K, be incubated 60 hours in the silica tube of Pa, in the entry of quenching again; Promptly obtain high-temperature magnetic shape memory alloy Ga
2MnNi.
The vacuum non-consumable electrode electric arc furnace of present embodiment is available from Shenyang science and technology instrument responsibility company limited.
Described rare gas element is helium, argon gas, neon or xenon.
With the Ga for preparing as stated above
2The MnNi alloy is to record heating DSC curve 1 under the condition of 10K/min at heat-up rate, records cooling DSC curve 2 under the condition of cooling rate 10K/min, and the result as shown in Figure 1.By the DSC curve among the figure as can be seen at the Ga of present embodiment preparation
2The MnNi alloy all has only a heat absorption and exothermic peak on the DSC of heating and cooling curve, Ga is described
2The MnNi alloy has same Ni
2The thermoelastic martensitic transformation feature that the MnGa ternary alloy is the same, and can record, the martensitic transformation temperature of gained alloy is 780K.
And with above-mentioned Ga
2The MnNi alloy carries out the test of Curie temperature, the result as shown in Figure 2, the Ga of present embodiment preparation
2The Curie temperature of MnNi alloy is 340K.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (4)
1. high-temperature magnetic shape memory alloy is characterized in that:
Its chemical constitution is 50 parts of Ga, 25 parts of Mn, 25 parts of Ni by the mole portion rate;
Its martensitic transformation temperature is 780K, and Curie temperature is 340K.
2. the preparation method of a high-temperature magnetic shape memory alloy as claimed in claim 1 comprises following processing step:
Put into the vacuum non-consumable electrode electric arc furnace according to molfraction than the Ga, 25 parts Mn, 25 parts the Ni that get 50 parts, under protection of inert gas, arc melting is 10～15 minutes under 1500～1700 ℃ condition, uses the metal blocks after the acetone wash heat again; Putting into vacuum tightness then is 10
-1Under 650 ℃ condition, be incubated 60 hours in the silica tube of Pa, in the entry of quenching again; Promptly obtain high-temperature magnetic shape memory alloy Ga
2MnNi.
3. preparation method according to claim 2 is characterized in that:
Described rare gas element is a kind of in argon gas, helium, neon or the xenon.
4. preparation method according to claim 2 is characterized in that:
Described arc melting temperature is 1550～1650 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910219909A CN101705409A (en) | 2009-11-17 | 2009-11-17 | High-temperature magnetic shape memory alloy and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910219909A CN101705409A (en) | 2009-11-17 | 2009-11-17 | High-temperature magnetic shape memory alloy and preparation method thereof |
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| CN101705409A true CN101705409A (en) | 2010-05-12 |
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| CN200910219909A Pending CN101705409A (en) | 2009-11-17 | 2009-11-17 | High-temperature magnetic shape memory alloy and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103310939A (en) * | 2013-05-17 | 2013-09-18 | 大连大学 | Magnetic liquid using plasma for strengthening magnetism and preparation method thereof |
| CN103741003A (en) * | 2014-01-07 | 2014-04-23 | 大连大学 | Novel high-temperature magnetic shape memory alloy and preparation method thereof |
| CN106148765A (en) * | 2015-04-07 | 2016-11-23 | 中国科学院宁波材料技术与工程研究所 | Ni2feGa class stress refrigerating material and preparation method and application |
-
2009
- 2009-11-17 CN CN200910219909A patent/CN101705409A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103310939A (en) * | 2013-05-17 | 2013-09-18 | 大连大学 | Magnetic liquid using plasma for strengthening magnetism and preparation method thereof |
| CN103310939B (en) * | 2013-05-17 | 2016-04-06 | 大连大学 | A kind of plasma helps magnetic liquid and preparation method thereof |
| CN103741003A (en) * | 2014-01-07 | 2014-04-23 | 大连大学 | Novel high-temperature magnetic shape memory alloy and preparation method thereof |
| CN106148765A (en) * | 2015-04-07 | 2016-11-23 | 中国科学院宁波材料技术与工程研究所 | Ni2feGa class stress refrigerating material and preparation method and application |
| CN106148765B (en) * | 2015-04-07 | 2018-02-09 | 中国科学院宁波材料技术与工程研究所 | Ni2FeGa class stress refrigerating materials and preparation method and application |
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Application publication date: 20100512 |