Structural-Phase State and Morphology of a Composite Based on Magnesium Hydride and Nanosized Aluminum Powder Obtained by Electrical Explosion of Wires

IF 0.5 Q4 PHYSICS, CONDENSED MATTER Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-01 DOI:10.1134/S1027451024701441

V. N. Kudiiarov, P. A. Baranova, A. V. Mostovshchikov

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Abstract

A composite based on magnesium hydride and nanosized aluminum powder obtained by electric explosion of wires was synthesized. Mechanical synthesis was carried out in a planetary ball mill. The time and frequency of synthesis, the mass ratio of balls and composite, and the percentage of aluminum were constant, while the diameter of grinding balls was varied: 3, 6, and 10 mm. Scanning electron microscopy was used to determine the average particle size of the composite depending on the diameter of the grinding balls. It was found that with a decrease in diameter from 10 to 3 mm the average particle size decreased from 2.7 to 2.2 μm. Energy dispersion analysis showed that nanosized aluminum particles were distributed evenly over the surface of magnesium hydride. A “core–shell” structure was formed. X-ray phase analysis revealed β-magnesium hydride, magnesium, magnesium oxide, and aluminum in the composite. X-ray diffraction patterns of the samples made it possible to calculate the structural parameters of the obtained composites, including microstresses. The average microstress value varied in the range of 0.004–0.006. A hypothesis has been put forward about an inversely proportional relationship between microstress and desorption temperature.

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基于氢化镁和纳米铝粉的复合材料的结构相态和形态学

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来源期刊

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques PHYSICS, CONDENSED MATTER-

CiteScore

0.90

自引率

25.00%

发文量

144

审稿时长

3-8 weeks

期刊介绍： Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques publishes original articles on the topical problems of solid-state physics, materials science, experimental techniques, condensed media, nanostructures, surfaces of thin films, and phase boundaries: geometric and energetical structures of surfaces, the methods of computer simulations; physical and chemical properties and their changes upon radiation and other treatments; the methods of studies of films and surface layers of crystals (XRD, XPS, synchrotron radiation, neutron and electron diffraction, electron microscopic, scanning tunneling microscopic, atomic force microscopic studies, and other methods that provide data on the surfaces and thin films). Articles related to the methods and technics of structure studies are the focus of the journal. The journal accepts manuscripts of regular articles and reviews in English or Russian language from authors of all countries. All manuscripts are peer-reviewed.