Effect of Heat Treatment on the Microstructure and Microhardness of Nanostructural Al2O3 Coatings

KOVALEVA, M ; TYURIN, Yu ; et al.

In: Development and Applications of Nanocomposite Coatings, Jg. 23 (2014), Heft 7, S. 1199-1209

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Nanostructural Al2O3 coatings were formed on a steel substrate surface using a multichamber detonation sprayer. The Al2O3 coatings were characterized by a dense microstructure with porosity below 1% and hardness of 1300 ± 25 HV0.3. The transition layer between the coating and substrate was up to 15 μm thick, containing Fe-Al-type intermetallic compounds (FeAl3, Fe2Al5). Postdeposition heat treatment of the samples at 850 °C for 3 h was carried out in air and argon environments. The effect of heat treatment on the microstructure and microhardness of the Al2O3 coatings was investigated by optical microscopy, scanning and transmission electron microscopy, scanning probe microscopy, x-ray phase analysis, and Vickers hardness testing. A positive impact of postcoating heat treatment on the coating microstructure and microhardness was observed. Heat treatment resulted in an increase in the coating hardness from 1300, to 1350 ± 25 HV0.3 and 1600 ± 25 HV0.3 after annealing in air and argon, respectively. Heat treatment in argon led to a more significant increase in the α-Al2O3 phase from 47 to 81%.

Titel:	Effect of Heat Treatment on the Microstructure and Microhardness of Nanostructural Al2O3 Coatings
Autor/in / Beteiligte Person:	KOVALEVA, M ; TYURIN, Yu ; VASILIK, N ; KOLISNICHENKO, O ; PROZOROVA, M ; ARSEENKO, M ; SIROTA, V ; PAVLENKO, I
Link:	Full Text Finder (Volltext) View record from PASCAL Archive
Zeitschrift:	Development and Applications of Nanocomposite Coatings, Jg. 23 (2014), Heft 7, S. 1199-1209
Veröffentlichung:	Heidelberg: Springer, 2014
Medientyp:	academicJournal
Umfang:	print, 34 ref
ISSN:	1059-9630 (print)
Schlagwort:	Metallurgy, welding Métallurgie, soudage Sciences exactes et technologie Exact sciences and technology Sciences appliquees Applied sciences Metaux. Metallurgie Metals. Metallurgy Transformation de matériaux métalliques Production techniques Traitements de surface Surface treatment Alumine Alumina Alúmina Tonerde Microdureté Microhardness Microdureza Mikrohaerte Microstructure Microestructura Mikrogefuege Nanostructure Nanoestructura Porosité Porosity Porosidad Porositaet Revêtement Coatings Revestimiento Ueberzug Traitement surface Tratamiento superficie Oberflaechenbehandlung Traitement thermique Heat treatment Tratamiento térmico Waermebehandlung Al2O3 coating heat treatment microhardness microstructure multichamber detonation sprayer porosity
Sonstiges:	Nachgewiesen in: PASCAL Archive Sprachen: English Original Material: INIST-CNRS Document Type: Article File Description: text Language: English Author Affiliations: Joint Research Center, Belgorod State National Research University, Pobeda 85, Belgorod 308015, Russian Federation ; E.O. Paton Electric Welding Institute, NASU, Bozhenko 11, Kiev 03650, Ukraine ; N.N. Semenov Institute of Chemical Physics, RAS, Kosygina 4, Moscow 117977, Russian Federation ; Center for Constructional Ceramics and the Engineering Prototyping, Belgorod State National Research University, Pobeda 85, Belgorod 308015, Russian Federation Rights: Copyright 2015 INIST-CNRS ; CC BY 4.0 ; Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS Notes: Metals. Metallurgy

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