Universität zu Köln

Miguel, F. L., Mueller, R., Mathur, S. and Muecklich, F. (2016). On the thermal stability of electrodeposited Ni-matrix-nanocomposite films reinforced with Ag-coated SnO2 nanowires. Surf. Coat. Technol., 287. S. 93 - 103. LAUSANNE: ELSEVIER SCIENCE SA. ISSN 0257-8972

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Abstract

Ni-matrix-nanocomposite films were produced by constant-current electrodeposition from a sulphamate bath. The composite consisted of a disordered array of Ag-coated SnO2 nanowires grown onto a substrate by chemical vapour deposition, around which the Ni matrix was electrodeposited. The thermal stability of the films was analysed by non-isothermal annealing at up to 600 degrees C and isothermally at 300 and 500 degrees C for 10 h, at high vacuum (10(-7) to 10(-6) mbar). Pure Ni films were also analysed for comparison purposes. The microstructural evolution of the samples was characterised by means of X-ray diffraction and scanning electron microscopy assisted by electron backscatter diffraction. The composite showed higher thermal stability, evidenced by an increase of only 70% in its average grain size after annealing at 500 degrees C, against the 300% observed for the pure Ni films, as a result of pinning of the matrix's grain boundaries by the Ag-SnO2 phase. Moreover, it retained its random crystallographic orientation, while Ni samples evolved from a < 100 > towards a < 111 > fibre texture due to surface energy minimisation. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Miguel, F. L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Muecklich, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-284563
DOI:	10.1016/j.surfcoat.2015.12.085
Journal or Publication Title:	Surf. Coat. Technol.
Volume:	287
Page Range:	S. 93 - 103
Date:	2016
Publisher:	ELSEVIER SCIENCE SA
Place of Publication:	LAUSANNE
ISSN:	0257-8972
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NANOCRYSTALLINE NICKEL; GRAIN-GROWTH; MECHANICAL-PROPERTIES; TEXTURE DEVELOPMENT; ANNEALING BEHAVIOR; ARC EROSION; THIN-FILMS; MICROSTRUCTURE; RECRYSTALLIZATION; SULFAMATE Multiple languages Materials Science, Coatings & Films; Physics, Applied Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/28456