Kinetic Characteristics of Nitriding of Zr–1% Nb Alloy

We study the kinetic characteristics of nitriding of thin-sheet (~ 1 mm) samples of Zr–1% Nb alloy treated in a nitrogen atmosphere ( ) in broad temperature ( T = 550; 650; 750; 850 and 950°С) and time ( τ = 1; 5 and 10 h) ranges. It is shown that the process of nitriding of the analyzed alloy obeys...

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Bibliographic Details
Published in:Materials science (New York, N.Y.) Vol. 58; no. 3; pp. 408 - 416
Main Authors: Trush, V. S., Pohrelyuk, I. M., Kravchyshyn, T. M., Luk’yanenko, A. G., Stoev, P. I., Fedirko, V. M., Kovalchuk, I. V.
Format: Journal Article
Language:English
Published: New York Springer US 01.11.2022
Springer
Springer Nature B.V
Subjects:
Alloys
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Science
Microhardness
Niobium base alloys
Nitriding
Nitrogen
Reflexes
Solid Mechanics
Specialty metals industry
Structural Materials
Zirconium base alloys
Zr–1% Nb alloy
microstructure
surface layer
parameters of the crystal lattice
kinetics of mass changes
microhardness
nitriding
ISSN:1068-820X, 1573-885X
Online Access:Get full text
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Summary:We study the kinetic characteristics of nitriding of thin-sheet (~ 1 mm) samples of Zr–1% Nb alloy treated in a nitrogen atmosphere ( ) in broad temperature ( T = 550; 650; 750; 850 and 950°С) and time ( τ = 1; 5 and 10 h) ranges. It is shown that the process of nitriding of the analyzed alloy obeys a law close to a parabolic dependence ( n ≈ 2). It is discovered that the activation energy of nitriding of the alloy within the temperature range 550–950°C is equal to 131.8 kJ/mole. The microstructure of the subsurface layer of the alloy after nitriding is analyzed. The distribution of the surface microhardness of Zr–1% Nb alloy is determined. The diagrams of intensity of the phase reflexes of α -Zr and ZrN on the surface of alloy after treatment in a nitrogen atmosphere are constructed.
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ISSN:1068-820X
1573-885X
DOI:10.1007/s11003-023-00678-2