Influence of sintering temperature on microstructure, magnetic properties of vacuum sintered Co (-Zn)-Ni-Al alloys

Arputhavalli, G. Johnsy; Agilan, S.; Saravanan, P.

doi:10.1016/j.matlet.2018.08.152

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…The alloys of close to Ni 36 Al 27 Co 37 compositions obtained by conventional methods of arc melting and subsequent heat treatment show the coercivity from 0.7 to 60 Oe [33][34][35]. Thin ribbons of the alloys obtained by rapid quenching show the coercivity from 100 to 2000 Oe [36], and the alloys obtained by conventional methods of powder metallurgy such as sintering the powders show the coercivity of about 160 to 190 Oe [37]. Thus, the spherical Ni 36 Al 27 Co 37 powder obtained in the present work is between the alloys produced by arc melting and the alloys produced by conventional methods of PM by its magnetic properties and can be used not only as a feedstock material for selective laser melting but also as a functional filler in various magnetic composites.…”

Section: Plasma Spheroidizationmentioning

confidence: 97%

Structure Evolution of Ni36Al27Co37 Alloy in the Process of Mechanical Alloying and Plasma Spheroidization

Мазеева

Kim

Ozerskoi

et al. 2021

Metals

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In this paper, a novel approach to obtain a ferromagnetic material for smart applications was implied. A combination of mechanical alloying (MA) and plasma spheroidization (PS) was applied to produce Ni36Al27Co37 spherical powder. Then its structure was systematically studied. It was shown that homogenization of the structure occurs due to mechanism of layered structure formation. The dependence of the lamella thickness on the energy dose input at MA was defined. It was found that 14.7 W⋅h/g is sufficient to obtain lamella thickness of 1 μm and less. The low-energy mode of a planetary mill with rotation speeds of the main disk/bowl of 150/−300 rpm makes it possible to achieve a uniform element distribution upon a minimal amount of impurity. During MA in an attritor Ni3Al-type intermetallic compounds are formed that result in more intensive degradation in particle size. Plasma spheroidization of the powder after MA allowed obtaining Ni36Al27Co37 spherical powder. The powder had a fine β + γ-structure. The particle size distribution remains almost unchanged compared to the MA stage. Coercivity of the powder is 79 Oe. The powder obtained meets the requirements of selective laser melting technology, but also can be utilized as a functional filler in various magnetic composites.

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Section: Plasma Spheroidizationmentioning

confidence: 97%

Structure Evolution of Ni36Al27Co37 Alloy in the Process of Mechanical Alloying and Plasma Spheroidization

Мазеева

Kim

Ozerskoi

et al. 2021

Metals

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“…Further, the sample was subjected to densification using vacuum hot pressing [15] and two-phase γ and L 10 microstructure are obtained. In the previous studies, the effect of sintering parameters on phase transformation behavior, porosity reduction, microstructure, domain structure of the vacuum sintered alloy has been studied [16]. Also, the same authors have studied the wear resistance behavior and the microhardness test for the spark plasma sintered Co-Ni-Al alloy [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of sintering temperature on the mechanical properties of vacuum sintered Co-(Zn)-Ni-Al alloys

Arputhavalli¹,

Agilan²,

Jebasingh

et al. 2020

SCI SINTER

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In the present study, the wear resistance behavior and the microhardness of the Co38Ni35Al27 and Co35Zn10Ni32Al23 ferromagnetic shape memory alloys (FSMAs) were investigated. The alloy samples were prepared by powder metallurgy method along with the vacuum sintering technique. The major aim is to prepare an alloy with high wear resistance having remarkable microhardness suitable for the sustainable shape memory alloy. The wear test report shows that the wear resistance is high for the sample sintered at 673 K and it gradually reduces when the sintering temperature decreases. The result also shows that the inclusion of zinc in the alloy increases the wear rate. The maximum hardness value of 126 HV was observed in Co38Ni35Al27 sample sintered at 673 K for 8 hrs because of its minimal porosity.

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Design of high-entropy films as ultra-violet light reflector

Yeh,

You,

Chang

et al. 2024

Applied Materials Today

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Influence of sintering temperature on microstructure, magnetic properties of vacuum sintered Co (-Zn)-Ni-Al alloys

Cited by 7 publications

References 18 publications

Structure Evolution of Ni36Al27Co37 Alloy in the Process of Mechanical Alloying and Plasma Spheroidization

Structure Evolution of Ni36Al27Co37 Alloy in the Process of Mechanical Alloying and Plasma Spheroidization

Effect of sintering temperature on the mechanical properties of vacuum sintered Co-(Zn)-Ni-Al alloys

Design of high-entropy films as ultra-violet light reflector

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