Structure and Phase Formation in the Ni–Al–Co System during Self-Propagating High-Temperature Synthesis

A. E. Sychev; Сычев А. Е.; M. L. Busurina; Бусурина М. Л.; O. D. Boyarchenko; Боярченко О. Д.; P. A. Lazarev; Лазарев П. А.; Yu. G. Morozov; Морозов Ю. Г.; A. O. Sivakova; Сивакова А. О.

doi:10.31857/S0002337X23070151

Structure and Phase Formation in the Ni–Al–Co System during Self-Propagating High-Temperature Synthesis

Authors: Sychev A.E.¹, Busurina M.L.¹, Boyarchenko O.D.¹, Lazarev P.A.¹, Morozov Y.G.¹, Sivakova A.O.¹
Affiliations:
1. Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences
Issue: Vol 59, No 7 (2023)
Pages: 733-739
Section: Articles
URL: https://medjrf.com/0002-337X/article/view/668210
DOI: https://doi.org/10.31857/S0002337X23070151
EDN: https://elibrary.ru/QSLCMY
ID: 668210

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Abstract

This paper reports on structure and phase formation of a Ni–Al–Co based alloy prepared by self-propagating high-temperature synthesis. The maximum combustion temperature was 1020°C in argon and 913°C in vacuum. The phase composition of the synthesized alloy includes a Ni0.7Co0.3
solid solution with a cubic (Pm
m) crystal lattice. Its microstructural constituents based on γ- and β-phases are 10–20 μm in size, and γ + β interlayers located on the interface between the γ- and β-phases are up to 1–2 μm in thickness. The alloy offers high plasticity, and its compressive strength is 451 MPa. Its low remanence, low coercive force, and high saturation magnetization indicate that the alloy is a soft magnetic material. It has a coercive force Hc = 146 Oe, remanent magnetization σr = 0.35 emu/g, and saturation magnetization σs = 36.76 emu/g.

Keywords

self-propagating high-temperature synthesis, microstructure, intermetallic alloy, solid solution

References

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