Ni-Mn基Heusler形状记忆合金的合成与结构研究

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019 Pub Date : 2019-10-29 DOI:10.1063/1.5130212

S. V. Dhanal, Akash Ghaste, V. G. Akkimardi, S. Kori, C. H. Bhosale

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引用次数: 1

摘要

镍锰基Heusler形状记忆合金是一种既具有铁磁性又具有形状记忆性能的智能材料。由于多功能特性，这些材料在执行器、传感装置和磁制冷方面的应用越来越受到人们的关注。本文对近年来出现的无镓形状记忆合金Ni-Mn-Sn和Ni-Mn-Al合金进行了合成和结构研究。为了提高合金的均匀性，在氩气气氛下采用真空电弧重熔技术合成了Ni48Mn26Sn26和Ni51Mn26Al23合金(at %)。利用x射线衍射(XRD)、扫描电镜(SEM)和能量色散x射线能谱(EDX)对制备的合金进行了结构研究和比较。结果表明，Ni-Mn-Al合金的平均晶粒尺寸小于Ni-Mn-Sn合金。Ni-Mn-Sn和Ni-Mn-Al合金的平均粒径分别为5 ~ 6µm和0.6 ~ 0.7µm。用振动样品磁强计(VSM)对合金的磁性行为进行了研究，结果表明合金具有软磁行为。合成的合金显示并证实了与Heusler形状记忆合金(X2YZ)的化学计量成分密切匹配，且无污染。镍锰基Heusler形状记忆合金是一种既具有铁磁性又具有形状记忆性能的智能材料。由于多功能特性，这些材料在执行器、传感装置和磁制冷方面的应用越来越受到人们的关注。本文对近年来出现的无镓形状记忆合金Ni-Mn-Sn和Ni-Mn-Al合金进行了合成和结构研究。为了提高合金的均匀性，在氩气气氛下采用真空电弧重熔技术合成了Ni48Mn26Sn26和Ni51Mn26Al23合金(at %)。利用x射线衍射(XRD)、扫描电镜(SEM)和能量色散x射线能谱(EDX)对制备的合金进行了结构研究和比较。结果表明，Ni-Mn-Al合金的平均晶粒尺寸小于Ni-Mn-Sn合金。形貌表明，Ni-Mn-Sn和Ni-Mn-A的平均粒径分别为5 ~ 6µm和0.6 ~ 0.7µm。

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Synthesis and structural studies of Ni-Mn based Heusler shape memory alloys

Ni-Mn based Heusler shape memory alloys are type of smart materials which possesses both ferromagnetic and shape memory properties. Due to multifunctional properties these materials have increased significant interest for the applications in actuators, sensing devices and magnetic refrigeration. The aim of this work was to synthesize and structural study of Ni-Mn-Sn and Ni-Mn-Al alloys which have recently emerged as Gallium-free shape memory alloys. Two alloys Ni48Mn26Sn26 and Ni51Mn26Al23 (at %) were synthesized using vacuum arc remelting technique under an argon gas atmosphere to improve homogeneity of the alloys. The structural studies of the prepared alloys were conducted and compared using X-ray Diffraction (XRD) and scanning electron microscope (SEM) coupled with Energy -dispersive X-ray spectroscopy (EDX). The results revealed that an average crystallite size of Ni-Mn-Al was smaller than Ni-Mn-Sn alloy. The morphology showed an average particle size of 5-6 µm and 0.6-0.7 µm for Ni-Mn-Sn and Ni-Mn-Al alloys respectively. Magnetic behavior studied by Vibrating sample magnetometer (VSM) showed soft magnetic behavior of the alloys. The synthesized alloys have exhibited and confirmed closely matching stoichiometric composition of Heusler shape memory alloys (X2YZ) with no contamination.Ni-Mn based Heusler shape memory alloys are type of smart materials which possesses both ferromagnetic and shape memory properties. Due to multifunctional properties these materials have increased significant interest for the applications in actuators, sensing devices and magnetic refrigeration. The aim of this work was to synthesize and structural study of Ni-Mn-Sn and Ni-Mn-Al alloys which have recently emerged as Gallium-free shape memory alloys. Two alloys Ni48Mn26Sn26 and Ni51Mn26Al23 (at %) were synthesized using vacuum arc remelting technique under an argon gas atmosphere to improve homogeneity of the alloys. The structural studies of the prepared alloys were conducted and compared using X-ray Diffraction (XRD) and scanning electron microscope (SEM) coupled with Energy -dispersive X-ray spectroscopy (EDX). The results revealed that an average crystallite size of Ni-Mn-Al was smaller than Ni-Mn-Sn alloy. The morphology showed an average particle size of 5-6 µm and 0.6-0.7 µm for Ni-Mn-Sn and Ni-Mn-A...

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PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019

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