Rare earth Ni-Mg-Co-Ga-based high-temperature shape memory alloy

A memory alloy and rare earth nickel technology, applied in the field of shape memory alloys, can solve the problems of high polycrystalline brittleness hindering practical application, and achieve the effects of improved plasticity, good shape memory performance, and high martensitic transformation temperature

Inactive Publication Date: 2010-11-03
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inherent polycrystalline high brittleness of NiMnGa intermetallic compounds seriously hinder

Method used

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  • Rare earth Ni-Mg-Co-Ga-based high-temperature shape memory alloy
  • Rare earth Ni-Mg-Co-Ga-based high-temperature shape memory alloy
  • Rare earth Ni-Mg-Co-Ga-based high-temperature shape memory alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: preparation (Ni 53 mn 22 co 6 Ga 19 ) 99.9Y 0.1 hot rolled sheet

[0026] Weighed 52.95% nickel 99.9% pure, 21.98% manganese 99.5% pure, 5.99% cobalt 99.9% pure, 18.98% gallium 99.99% pure and 0.1% yttrium 99.5% pure. Put the above-mentioned nickel, manganese, cobalt, gallium and yttrium raw materials into a non-consumable vacuum electric arc furnace, and evacuate to 6×10 -3 Pa, filled with high-purity argon to 0.5×10 5 Pa, and then repeated smelting at 1700°C for 4 times to obtain (Ni 53 mn 22 co 6 Ga 19 ) 99.9 Y 0.1 High temperature shape memory alloy ingots. Put the superalloy ingot obtained above into a vacuum heat treatment furnace for heat treatment, and the vacuum degree is 5×10 -3 Pa, after heat treatment at 850°C for 24 hours, cool with the furnace. The heat-treated (Ni 53 mn 22 co 6 Ga 19 ) 99.9 Y 0.1 The high-temperature alloy ingot is hot-rolled at a temperature of 850° C., and the alloy ingot is slowly hot-rolled into a sh...

Embodiment 2

[0029] Embodiment 2: preparation (Ni 53 mn 22 co 6 Ga 19 ) 99.9 Gd 0.1 hot rolled sheet

[0030] 52.95% nickel 99.9% pure, 21.98% manganese 99.5% pure, 5.99% cobalt 99.9% pure, 18.98% gallium 99.99% pure and 0.1% gadolinium 99.5% pure. Put the above-mentioned nickel, manganese, cobalt, gallium and gadolinium raw materials into a non-consumable vacuum electric arc furnace, and evacuate to 6×10 -3 Pa, filled with high-purity argon to 0.5×10 5 Pa, and then repeated smelting at 1700°C for 4 times to obtain (Ni 53 mn 22 co 6 Ga 19 ) 99.9 Gd 0.1 High temperature shape memory alloy ingots. Put the superalloy ingot obtained above into a vacuum heat treatment furnace for heat treatment, and the vacuum degree is 5×10 -3 Pa, after heat treatment at 850°C for 24 hours, cool with the furnace. The heat-treated (Ni 53 mn 22 co 6 Ga 19 ) 99.9 Gd 0.1 The high-temperature alloy ingot is hot-rolled at a temperature of 850° C., and the alloy ingot is slowly hot-rolled into a ...

Embodiment 3

[0032] Embodiment 3: preparation (Ni 53 mn 22 co 6 Ga 19 ) 99.8 Dy 0.2 hot rolled sheet

[0033] Weighed 52.89% nickel 99.9% pure, 21.96% manganese 99.5% pure, 5.99% cobalt 99.9% pure, 18.96% gallium 99.99% pure and 0.2% dysprosium 99.5% pure. Put the above-mentioned nickel, manganese, cobalt, gallium and dysprosium raw materials into a non-consumable vacuum electric arc furnace, and evacuate to 5×10 -3 Pa, filled with high-purity argon to 0.7×10 5 Pa, and then repeated smelting at 2000°C for 5 times to obtain (Ni 53 mn 22 co 6 Ga 19 ) 99.8 Dy 0.2 High temperature shape memory alloy ingots. Put the superalloy ingot obtained above into a vacuum heat treatment furnace for heat treatment, and the vacuum degree is 6×10 -3 Pa, after heat treatment at 900°C for 24 hours, cool with the furnace. The heat-treated (Ni 53 mn 22 co 6 Ga 19 ) 99.8 Dy 0.2 The high-temperature alloy ingot is hot-rolled at a temperature of 950° C., and the alloy ingot is slowly hot-rolled...

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Abstract

The invention discloses a rare earth Ni-Mg-Co-Ga-based high-temperature shape memory alloy relating to a shape memory alloy. The invention provides a rare earth Ni-Mg-Co-Ga-based high-temperature shape memory alloy with high martensite phase-transition temperature and better plasticity and shape memory function, and a preparation method thereof. The chemical formula is (Ni53Mn22Co6Ga19)100-xAx, wherein A=Dy, Y and Gd, and the atom percent of x is 0-1. Ni, Mg, Co, Ga and rare earth raw material are put into a furnace, vacuumized, charged with argon and smelted to obtain the ingot material of the rare earth Ni-Mg-Co-Ga-based high-temperature shape memory alloy; the ingot material of the rare earth Ni-Mg-Co-Ga-based high-temperature shape memory alloy is processed by heating and is cooled along with the furnace; the ingot material of the rare earth Ni-Mg-Co-Ga-based high-temperature shape memory alloy, on which heat treatment is performed, is rolled into lamellar alloy; the obtained lamellar alloy is cut into test specimen; and after processed by heating, the test specimen is quenched by ice water to obtain the rare earth Ni-Mg-Co-Ga-based high-temperature shape memory alloy.

Description

technical field [0001] The invention relates to a shape-memory alloy, in particular to a rare-earth nickel-manganese-cobalt-gallium-based high-temperature shape-memory alloy. Background technique [0002] At present, the high-temperature shape memory alloys with a martensite transformation temperature exceeding 200 °C mainly include (Ni-X)Ti system (X=Pt, Pb, Au), Ni(Ti-X) system alloy (X=Hf , Zr), NiAl alloys and CuAl alloys etc. Research progress of shape memory alloys, Materials Science and Engineering, 1994, 12(1), 5; 3, K.Otsuka and X.Ren, Rencent development in the research of shape memory alloys, Intermetallics7, 511-528(1999); 4. J.Van Humbeeck, High temperature shape memory alloys, J.Eng.Mater.Tech, 1999, 121, 98), but these alloy systems all have problems of one kind or another, for example, NiAl system and CuAl system high temperature shape memory The alloy is not stable enough, and its memory effect will deteriorate sharply with the precipitation of equilibrium...

Claims

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Application Information

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IPC IPC(8): C22C19/03C22F1/10
Inventor 马云庆杨水源田诗文赖三哩张锦彬黄艺雄刘兴军王翠萍
Owner XIAMEN UNIV
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