Thermal Conductivity in &lt;I&gt;X&lt;/I&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;I&gt;YZ&lt;/I&gt; Heusler Type Intermetallic Compounds

Nakata, Junji; Terada, Yoshihiro; Takizawa, Shigeo; Ohkubo, Kenji; Mohri, Tetsuo; Suzuki, Tomoo

doi:10.2320/matertrans1989.37.442

Cited by 8 publications

(45 citation statements)

References 48 publications

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“…12) with the B2 structure, 39) Ni 3 Ga-Ti alloy with the L1 2 structure 40) and for the ternary compound Ni 2 AlTi with the L2 1 structure. 34) 3174 Y. Terada, K. Ohkubo, T. Mohri and T. Suzuki A; ridge is directed parallel to the equi-Al composition line in the Ni-Al-X or Co-Al-X ternary grid, C; ridge is directed parallel to the equi-Ni or equi-Co composition line, and B; ridge is directed between the two directions.…”

Section: Ridge Direction and Lobe Directionmentioning

confidence: 99%

Thermal Conductivity of Intermetallic Compounds with Metallic Bonding

et al. 2002

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Thermal conductivity is one of the key parameters required for high-temperature structural applications of metallic materials. In this overview, the thermal conductivity of intermetallic compounds are extensively described based mainly on our past works, since there had been less works in this research field. Emphasis is placed on the B2 and the L1 2 compounds with metallic bonding such as NiAl, Ni 3 Al, etc., which have been attracting attention for engineering applications at higher temperatures. The thermal conductivity data have been accumulated for the intermetallic compounds, and the phenomenological aspects are reviewed in detail as a function of alloy composition, constituent and temperature. The Wiedemann-Franz law is applicable to the intermetallic compounds, indicating that the carrier of thermal conduction is an electron rather than a phonon. The thermal conductivity of an intermetallic compound with the ordered crystal structure is characterized as an enhancement due to ordering with reference to the basic contribution of solid solution with the disordered crystal structure. It is demonstrated that the thermal conductivity of intermetallic compounds is reduced by the addition of a third element, and this subject is also covered.

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Section: Ridge Direction and Lobe Directionmentioning

confidence: 99%

Thermal Conductivity of Intermetallic Compounds with Metallic Bonding

et al. 2002

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“…The Heusler compounds are a group of ternary intermetallic alloys formed at the stoichiometric composition X 2 YZ (generally, X and Y are transition metals and Z is a b-subgroup element), with the doubly ordered L2 1 structure based on the ordered B2 [2]. They have been widely reported to have excellent ferromagnetic, paramagnetic, mechanical and thermoelectric properties [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…AlNi 2 Ti with L2 1 structure can provide NiAl or Ni-base and Ti-base alloys with good high-temperature mechanical properties by precipitate strengthening [5][6][7][8][9][10][11][12][13][14][15][16]. Especially the mechanical properties of Fe-Ni-Al-Ti ferritic alloys, such as creep resistance and yield strength, can be significantly enhanced due to the AlNi 2 Ti precipitates [17][18][19][20][21][22][23][24][25][26]. In addition, AlNi 2 Ti precipitate phase has also been observed in microstructures of Al-doped Ni-Ti shape memory alloys that have huge potential to be applied as functional material in many areas such as clinical medicine, biotechnology, automation, energy engineering, electronics industry, aeronautics and astronautics, owing to their pseudoelasticity, superplasticity and shape memory properties [27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

“…They have been widely reported to have excellent ferromagnetic, paramagnetic, mechanical and thermoelectric properties [3,4]. AlNi 2 Ti with L2 1 structure can provide NiAl or Ni-base and Ti-base alloys with good high-temperature mechanical properties by precipitate strengthening [5][6][7][8][9][10][11][12][13][14][15][16]. Especially the mechanical properties of Fe-Ni-Al-Ti ferritic alloys, such as creep resistance and yield strength, can be significantly enhanced due to the AlNi 2 Ti precipitates [17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…AlNi 2 Ti is one of the Heusler compounds first identified by Heusler in 1903 [1]. The Heusler compounds are a group of ternary intermetallic alloys formed at the stoichiometric composition X 2 YZ (generally, X and Y are transition metals and Z is a b-subgroup element), with the doubly ordered L2 1 structure based on the ordered B2 [2].…”

Section: Introductionmentioning

confidence: 99%

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First-Principles Investigations of the Structural, Anisotropic Mechanical, Thermodynamic and Electronic Properties of the AlNi2Ti Compound

Tang

Gao

et al. 2018

Crystals

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Abstract:In this paper, the electronic, mechanical and thermodynamic properties of AlNi 2 Ti are studied by first-principles calculations in order to reveal the influence of AlNi 2 Ti as an interfacial phase on ZTA (zirconia toughened alumina)/Fe. The results show that AlNi 2 Ti has relatively high mechanical properties, which will benefit the impact or wear resistance of the ZTA/Fe composite. The values of bulk, shear and Young's modulus are 164.2, 63.2 and 168.1 GPa respectively, and the hardness of AlNi 2 Ti (4.4 GPa) is comparable to common ferrous materials. The intrinsic ductile nature and strong metallic bonding character of AlNi 2 Ti are confirmed by B/G and Poisson's ratio. AlNi 2 Ti shows isotropy bulk modulus and anisotropic elasticity in different crystallographic directions. At room temperature, the linear thermal expansion coefficient (LTEC) of AlNi 2 Ti estimated by quasi-harmonic approximation (QHA) based on Debye model is 10.6 × 10 −6 K −1 , close to LTECs of zirconia toughened alumina and iron. Therefore, the thermal matching of ZTA/Fe composite with AlNi 2 Ti interfacial phase can be improved. Other thermodynamic properties including Debye temperature, sound velocity, thermal conductivity and heat capacity, as well as electronic properties, are also calculated.

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(FeMnNi)84(AlTi)16 High-Entropy Alloy: Correlation of Microstructure, Strengthening Mechanisms and Hardness at Various Conditions (As-Cast, Solution Treated, Aged)

Konakoglou

Mathiou

Georgatis

et al. 2022

Metallogr. Microstruct. Anal.

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A (FeMnNi)84(AlTi)16 high-entropy alloy was produced by vacuum arc melting successfully. The microstructure of the ascast state showed the existence of two FCC phases along with potential precipitates. The solution treatment response of the alloy for 2 h at 1150 °C and the effect of aging time at 750 °C in the microstructure and microhardness were also evaluated. It was observed that the solution treatment parameters were insufficiently low to dissolve the as-cast precipitates into the matrix. The double FCC matrix identified may be correlated with a solidification range and insufficient diffusion during the solidification process. The maximum hardness at 90 min aging time can be mainly attributed to the precipitation shearing mechanism in both matrix areas. The lower hardness value reported at 160 h aging time was estimated that it is derived by the change of the main strengthening mechanism from shearing to Orowan. The island-like precipitates that depleted Ti element from the Ni-rich intergranular area may be identified as a Ni2AlTi Heusler phase.

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Thermal Conductivity in <I>X</I><SUB>2</SUB><I>YZ</I> Heusler Type Intermetallic Compounds

Cited by 8 publications

References 48 publications

Thermal Conductivity of Intermetallic Compounds with Metallic Bonding

Thermal Conductivity of Intermetallic Compounds with Metallic Bonding

First-Principles Investigations of the Structural, Anisotropic Mechanical, Thermodynamic and Electronic Properties of the AlNi2Ti Compound

(FeMnNi)84(AlTi)16 High-Entropy Alloy: Correlation of Microstructure, Strengthening Mechanisms and Hardness at Various Conditions (As-Cast, Solution Treated, Aged)

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