NDLI: Demands, Potentials, and Economic Aspects of Thermal Spraying with Suspensions: A Critical Review

Content Provider	Springer Nature Link
Author	Toma, Filofteia Laura Potthoff, Annegret Berger, Lutz Michael Leyens, Christoph
Copyright Year	2015
Abstract	Research and development work for about one decade have demonstrated many unique thermal spray coating properties, particularly for oxide ceramic coatings by using suspensions of fine powders as feedstock in APS and HVOF processes. Some particular advantages are direct feeding of fine nano- and submicron-scale particles avoiding special feedstock powder preparation, ability to produce coating thicknesses ranging from 10 to 50 µm, homogeneous microstructure with less anisotropy and lower surface roughness compared to conventional coatings, possibility of retention of the initial crystalline phases, and others. This paper discusses the main aspects of thermal spraying with suspensions which have been taken into account in order to produce these coatings on an economical way. The economic efficiency of the process depends on the availability of suitable additional system components (suspension feeder, injectors), on the development and handling of stable suspensions, as well as on the high process stability for acceptance at industrial scale. Special focus is made on the development and processability of highly concentrated water-based suspensions. While costs and operational safety clearly speak for use of water as a liquid media for preparing suspensions on an industrial scale, its use is often critically discussed due to the required higher heat input during spraying compared to alcoholic suspensions.
Starting Page	1143
Ending Page	1152
Page Count	10
File Format	PDF
ISSN	10599630
Journal	Journal of Thermal Spray Technology
Volume Number	24
Issue Number	7
e-ISSN	15441016
Language	English
Publisher	Springer US
Publisher Date	2015-07-17
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	concentrated suspension economic aspects hardware development process stability suspension thermal spraying Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings Characterization and Evaluation of Materials Operating Procedures, Materials Treatment Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Materials Chemistry Condensed Matter Physics

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