Microstructure and phase transformations in a Ni50Mn 29Ga16Gd5 alloy with a high transformation temperature

Wei Cai; Li Gao; Z. Y. Gao

doi:10.1007/s10853-007-1893-2

Microstructure and phase transformations in a Ni₅₀Mn ₂₉Ga₁₆Gd₅ alloy with a high transformation temperature

Wei Cai^*
, Li Gao
, Z. Y. Gao

^*Corresponding author for this work

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

A Heusler Ni₅₀Mn₂₉Ga₁₆Gd₅ alloy with a high transformation temperature has been obtained by substituting 5 at% Gd for Ga in a ternary Ni₅₀Mn₂₉Ga₂₁ ferromagnetic shape memory alloy. The microstructure and phase transformations in the Ni₅₀Mn₂₉Ga₁₆Gd₅ alloy have been investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and differential scanning calorimetry. It is shown that the microstructure of the Ni₅₀Mn₂₉Ga ₁₆Gd₅ alloy consists of matrix and hexagonal Gd (Ni,Mn)₄Ga phase, which indicates a eutectic structure composed of these two phases. One-step thermoelastic martensitic transformation occurs in this quaternary alloy. Ni₅₀Mn₂₉Ga₁₆Gd ₅ alloy exhibits a martensite transformation start temperature up to 524 K, approximately 200 K higher than that of Ni₅₀Mn ₂₉Ga₂₁ alloy. At room temperature, non-modulated martensite with twin substructure is observed in Ni₅₀Mn ₂₉Ga₁₆Gd₅ alloy.

Original language	English
Pages (from-to)	9216-9220
Number of pages	5
Journal	Journal of Materials Science
Volume	42
Issue number	22
DOIs	https://doi.org/10.1007/s10853-007-1893-2
State	Published - Nov 2007
Externally published	Yes

Access to Document

10.1007/s10853-007-1893-2

Cite this

@article{6570d5e253e54d85b743e61a720ad621,

title = "Microstructure and phase transformations in a Ni50Mn 29Ga16Gd5 alloy with a high transformation temperature",

abstract = "A Heusler Ni50Mn29Ga16Gd5 alloy with a high transformation temperature has been obtained by substituting 5 at\% Gd for Ga in a ternary Ni50Mn29Ga21 ferromagnetic shape memory alloy. The microstructure and phase transformations in the Ni50Mn29Ga16Gd5 alloy have been investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and differential scanning calorimetry. It is shown that the microstructure of the Ni50Mn29Ga 16Gd5 alloy consists of matrix and hexagonal Gd (Ni,Mn)4Ga phase, which indicates a eutectic structure composed of these two phases. One-step thermoelastic martensitic transformation occurs in this quaternary alloy. Ni50Mn29Ga16Gd 5 alloy exhibits a martensite transformation start temperature up to 524 K, approximately 200 K higher than that of Ni50Mn 29Ga21 alloy. At room temperature, non-modulated martensite with twin substructure is observed in Ni50Mn 29Ga16Gd5 alloy.",

author = "Wei Cai and Li Gao and Gao, \{Z. Y.\}",

year = "2007",

month = nov,

doi = "10.1007/s10853-007-1893-2",

language = "英语",

volume = "42",

pages = "9216--9220",

journal = "Journal of Materials Science",

issn = "0022-2461",

publisher = "Springer",

number = "22",

}

TY - JOUR

T1 - Microstructure and phase transformations in a Ni50Mn 29Ga16Gd5 alloy with a high transformation temperature

AU - Cai, Wei

AU - Gao, Li

AU - Gao, Z. Y.

PY - 2007/11

Y1 - 2007/11

N2 - A Heusler Ni50Mn29Ga16Gd5 alloy with a high transformation temperature has been obtained by substituting 5 at% Gd for Ga in a ternary Ni50Mn29Ga21 ferromagnetic shape memory alloy. The microstructure and phase transformations in the Ni50Mn29Ga16Gd5 alloy have been investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and differential scanning calorimetry. It is shown that the microstructure of the Ni50Mn29Ga 16Gd5 alloy consists of matrix and hexagonal Gd (Ni,Mn)4Ga phase, which indicates a eutectic structure composed of these two phases. One-step thermoelastic martensitic transformation occurs in this quaternary alloy. Ni50Mn29Ga16Gd 5 alloy exhibits a martensite transformation start temperature up to 524 K, approximately 200 K higher than that of Ni50Mn 29Ga21 alloy. At room temperature, non-modulated martensite with twin substructure is observed in Ni50Mn 29Ga16Gd5 alloy.

AB - A Heusler Ni50Mn29Ga16Gd5 alloy with a high transformation temperature has been obtained by substituting 5 at% Gd for Ga in a ternary Ni50Mn29Ga21 ferromagnetic shape memory alloy. The microstructure and phase transformations in the Ni50Mn29Ga16Gd5 alloy have been investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and differential scanning calorimetry. It is shown that the microstructure of the Ni50Mn29Ga 16Gd5 alloy consists of matrix and hexagonal Gd (Ni,Mn)4Ga phase, which indicates a eutectic structure composed of these two phases. One-step thermoelastic martensitic transformation occurs in this quaternary alloy. Ni50Mn29Ga16Gd 5 alloy exhibits a martensite transformation start temperature up to 524 K, approximately 200 K higher than that of Ni50Mn 29Ga21 alloy. At room temperature, non-modulated martensite with twin substructure is observed in Ni50Mn 29Ga16Gd5 alloy.

UR - https://www.scopus.com/pages/publications/34548530364

U2 - 10.1007/s10853-007-1893-2

DO - 10.1007/s10853-007-1893-2

M3 - 文章

AN - SCOPUS:34548530364

SN - 0022-2461

VL - 42

SP - 9216

EP - 9220

JO - Journal of Materials Science

JF - Journal of Materials Science

IS - 22

ER -

Microstructure and phase transformations in a Ni₅₀Mn ₂₉Ga₁₆Gd₅ alloy with a high transformation temperature

Abstract

Access to Document

Other files and links

Fingerprint

Cite this