Manufacturing of high entropy alloy in the Ni-Nb-Co-Fe-Cr system by rapidly solidification method for oxide ceramic brazing

This paper presents results of research of high-entropy alloys of the Ni-Nb-Co-Fe-Cr system in the as-cast state and after rapid quenching from the melt. The results of experiments on obtaining a brazed joint of aluminum-oxide ceramics with using the filler metal of this system and the results of a...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-12, Vol.1005 (1), p.12012
Main Authors: Gabov, A I, Ivannikov, A A, Sevryukov, O N
Format: Article
Language:English
Subjects:
Alloys
Aluminum
Aluminum oxide
Brazed joints
Brazing alloys
Ceramics
Chromium
Cobalt
Differential thermal analysis
Entropy
Filler metals
High entropy alloys
Iron
Liquidus
Microhardness
Nickel
Niobium
Phase composition
Rapid quenching (metallurgy)
Solidification
Solidus
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Summary:This paper presents results of research of high-entropy alloys of the Ni-Nb-Co-Fe-Cr system in the as-cast state and after rapid quenching from the melt. The results of experiments on obtaining a brazed joint of aluminum-oxide ceramics with using the filler metal of this system and the results of a studying this joint are presented. Differential thermal analysis (DTA), X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray microanalysis (EDX) and measurement of microhardness were used as experimental research methods. The liquidus and solidus temperatures of high-entropy alloy Nb0.73CoCrFeNi2.1 were determined. The phase composition of alloys of the Ni-Nb-Co-Fe-Cr system was studied. It was shown, that alloys of this system can be used as filler metal to create a joint between ceramics. The microhardness of the brazed seam was studied. Based on these results the brazing mode for samples of aluminum-oxide ceramics with using high-entropy alloy Nb0.73CoCrFeNi2.1 as a filler metal was chosen.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/1005/1/012012