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ČELKO, L. KLAKURKOVÁ, L. JECH, D. JULIŠ, M. SLÁMEČKA, K. ŠVEJCAR, J.
Original Title
Microstructure Development and Phlase Evolutin of Nickel Coated Aluminium and Hydronalium Substrates
Type
conference paper
Language
English
Original Abstract
In this work, the microstructural changes of nickel coated aluminium and hydronalium substrates were investigated after the heat treatment above the melting point of pure aluminium. The 99.0Ni powder was used to produce the coating using high velocity oxyfuel spraying on 5 mm thick 99.5Al and AlMg3 sheets surface. As-sprayed samples were annealed in the temperature range of 660 - 800°C in ambient atmosphere. The dwell time for isothermal exposure was set from several minutes up to several hours depending on used temperature. Resulting microstructures were investigated by means of metallography and light and scanning electron microscopy techniques. Employed heat treatment allowed to form two different (binary and ternary) hypereutectic alloys. The main differences resulted from different initial substrate microstructures and chemical composition. Compare to pure aluminium substrate microstructure, hydronalium alloy contained a number of nucleation sites in the form of eutectic and/or intermetallic phases and also, probably due to the higher diffusion mobility of aluminium, exhibited the faster dissolution of as-sprayed nickel coating region.
Keywords
Aluminium; Hydronalium; Thermal Spraying; Heat Treatment; Electron Microscopy - Scanning
Authors
ČELKO, L.; KLAKURKOVÁ, L.; JECH, D.; JULIŠ, M.; SLÁMEČKA, K.; ŠVEJCAR, J.
RIV year
2014
Released
23. 5. 2014
Publisher
TANGER Ltd.
Location
Ostrava
ISBN
978-80-87294-54-3
Book
Metal 2014 Conference Prosceedings
Edition
1
Pages from
915
Pages to
920
Pages count
6
BibTex
@inproceedings{BUT116616, author="Ladislav {Čelko} and Lenka {Klakurková} and David {Jech} and Martin {Juliš} and Karel {Slámečka} and Jiří {Švejcar}", title="Microstructure Development and Phlase Evolutin of Nickel Coated Aluminium and Hydronalium Substrates", booktitle="Metal 2014 Conference Prosceedings", year="2014", series="1", pages="915--920", publisher="TANGER Ltd.", address="Ostrava", isbn="978-80-87294-54-3" }