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Characterization of whisker‐like crystals grown during the evaporation of Al‐Cu‐Co alloy
Author(s) -
Bogdanowicz W.,
Wokulski Z.,
Krawczyk J.,
Albrecht R.
Publication year - 2010
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201000360
Subject(s) - whisker , intermetallic , alloy , evaporation , cobalt , stoichiometry , materials science , chemical composition , copper , oxide , chemical engineering , shell (structure) , substrate (aquarium) , crystallography , metallurgy , chemistry , composite material , physics , organic chemistry , engineering , thermodynamics , oceanography , geology
Morphological details and chemical composition of whisker‐like crystals (W‐LCs) were studied. The W‐LCs were grown on Al 2 O 3 substrate as a result of evaporation of Al 65 Cu 26 Co 9 alloy. Morphologically diverse W‐LCs formed groups in the shape of brushes. The two‐phase nature of W‐LCs was revealed. The W‐LCs consisted of an intermetallic on the Al matrix forming the core and of an external oxide shell of developed faces. The chemical composition of the core and the shell corresponded roughly to the stoichiometric formula Al 3 Cu and AlO accordingly. Additionally the core contained small amounts of cobalt and oxygen and the shell‐copper and cobalt. The growth mechanism of W‐LCs was proposed based on their morphological details and chemical compositions. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)