THE INFLUENCE OF ULTRASOUND ACTIVATION ON MICROSTRUCTURE AND HARDNESS OF POROUS Ni-Ti SHAPE MEMORY ALLOYS

Pharmacy World & Science Pub Date : 2022-09-30 DOI:10.31435/rsglobal_ws/30092022/7863

Dovchinvanchig Maashaa, Tsetsegmaa Agvaantseren, Baasanjargal Narmandakh, Vasili Vasilievich Rubanik, Vasili Vasilievich Rubanik Jr.

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Abstract

A Ni-Ti shape memory alloy with a porous structure is obtained by the method of self-propagating high-temperature synthesis (SHS) and investigated the possibility of changing its microstructure and hardness. The research aimed to study the changes in the microstructure and hardness of the Ni-Ti shape memory alloy with a porous structure when the Ni and Ti metal powders are preliminarily subjected to ultrasound activation for different periods. The microstructure of the alloy surfaces was studied with using a Hitachi scanning electron microscope (SEM), and the hardness was measured with a Brinell electronic hardness tester. The results of the experiments showed that the porosity and hardness of the Ni-Ti alloy enlarged with an increase in the time of ultrasound activation of the components. The innovative aspect of this study is that prior to the synthesis of powder elements with a purity of Ni 99.9% and Ti 99.9% with an average particle size of 40 μm, they were previously subjected separately to ultrasound activation at different periods.

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超声活化对多孔镍钛形状记忆合金显微组织和硬度的影响

采用自蔓延高温合成(SHS)方法制备了具有多孔结构的Ni-Ti形状记忆合金，并研究了改变其显微组织和硬度的可能性。本研究旨在研究具有多孔结构的Ni-Ti形状记忆合金在不同时期对Ni和Ti金属粉末进行初步超声活化后，其显微组织和硬度的变化。采用日立扫描电镜(SEM)研究了合金表面的显微组织，用布氏硬度计测定了合金的硬度。实验结果表明，随着各组分超声活化时间的延长，Ni-Ti合金的孔隙率和硬度增大。本研究的创新之处在于，在合成Ni纯度为99.9%、Ti纯度为99.9%、平均粒径为40 μm的粉末元素之前，分别对其进行了不同时期的超声活化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Pharmacy World & Science 医学-药学

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>12 weeks

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