Mechanosynthesis formation study and electrical resistivity of short milled Fe50Mn35Sn15 Heusler intermetallic compound

IF 4.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Intermetallics Pub Date : 2025-03-13 DOI:10.1016/j.intermet.2025.108738
Florin Popa , Traian Florin Marinca , Niculina Argentina Sechel , Horea Florin Chicinaș , Dan Ioan Frunză , Ionel Chicinaș
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Abstract

Although the Heusler alloys are usually obtained by arc melting, in this study we choose to investigate the formation of the off stoichiometric Fe50Mn35Sn15 (at. %) Heusler alloy by mechanical alloying using elemental powders as raw materials. The mechanical alloying was conducted in high-purity argon gas up to 30 h, using a planetary ball mill. The formation by mechanical alloying can be described as complex one, with the formation of the A2 disordered Heusler phase as the majority phase after 15 h of milling. Milling the alloy up to 30 h, led to Heusler phase decomposition. The phase formation and obtained quantities were analysed using the Rietveld method applied to the recorded X-ray diffraction patterns. Evolution of the mean crystalline size and lattice strain versus milling time were computed. After 30 h of milling, the mean crystallite size of the milled alloy reached a value of 50 nm. The morphology and element distribution were analysed by scanning electron microscopy and energy dispersive X-ray spectroscopy. Particle size distribution showed important changes upon elements reaction, as the elements react, the median particle size (D50) decreases up to 3.5 μm and further increases at 5 μm as the main phase is the A2 Heusler phase. The electrical resistivity was investigated, and an evolution with phase formation was found, as the electrical resistivity increased up 5.83mΩm at 10 h where an equilibrium between initial elements and Ni2MnSn Heusler phase is found, followed by a sharp decrease up to 2.8 mΩm for 30 h of milling as the Heusler phase is the main phase.
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来源期刊
Intermetallics
Intermetallics 工程技术-材料科学:综合
CiteScore
7.80
自引率
9.10%
发文量
291
审稿时长
37 days
期刊介绍: This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.
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