Powder Materials of REM-Containing Alloys Obtained by Gas Atomization of the Melt for Laser Surfacing Technologies and Additive Processes

Abstract:

It is shown experimentally and numerically that quenching (Melt Quenching - MQ) of REM-containing (up to 40 wt.%) Fe-B-Nd melt by inert gas flow (Gas Atomisation Method - GAP) in NH3-containing atmosphere makes it possible to obtain spherical particles with a given fractional and chemical composition and characterised by increased corrosion resistance. The applicability of the obtained particles in the traditional powder technology for the formation of anisotropic and isotropic sintered magnets is established. It is shown that MQ GAP can regulate the functional properties of sintered magnets by mixing different chemical and fractional compositions. It is shown that heat treatment of MQ GAP powders improves their magnetic hysteresis properties and magnetoplasts made from them. The applicability of the obtained MQ GAP REM-containing particles for cladding technologies and additive processes is proved. Hybrid laser & micro-casting surfacing technology for additive processes of processing Fe-Nd-B ternary and MQ GAP alloys into micromagnets - 'Hybrid laser & micro-casting technology for surfacing in additive processes' is proposed. The possibility of realising the described technology for other MQ GAP REM containing alloys with multicomponent low melting eutectic in the intergranular space capable of amorphising at cooling rates of 10³÷10⁵ K/s has been shown.

• Periodical: Materials Science Forum (Volume 1151)
• Pages: 75-89
• DOI: https://doi.org/10.4028/p-J7oD3w
• Online since: June 2025
• Authors: Valeriy Vasilyevich Savin*, Ivan Vladimirovich Barinov, Igor Andreevich Pastukhov, Edmond Karenovich Poghosyan, Vitaliy Georgievich Salamatov, Ludmila Alekseevna Savina, Igor Olegovich Stasyuk
• Keywords: Additive Processes, Gas Atomization, Hybrid Laser & Micro Casting, Melt Quenching, Micro Magnetic Systems, NdFeB, Permanent Magnets, Powder Materials, Powder Metallurgy, Rare Earths

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