Structural and thermodynamic analysis of whiskers on the surface of grey cast iron

Structural and thermodynamic analysis of whiskers on the surface of grey cast iron

The paper focuses, first, on the characterization of the whiskers on the surface of grey cast iron and second, it gives an explanation of whiskers growth based on thermodynamic calculations. The whiskers were observed on the surface of hot plates for the electric stove after black-oxide-coating (bla...

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Veröffentlicht in:Metalurgija 2013-01, Vol.52 (1), p.11
Hauptverfasser: Nagode, A, Klančnik, G, Bizjak, M, Kovačević, D, Kosec, B, Dervarič, E, Zorc, B, Kosec, L
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Sprache:eng
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grey cast iron
hematite (Fe2O3)
magnetite (Fe3O4)
whiskers
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container_issue 1
container_start_page 11
container_title Metalurgija
container_volume 52
creator Nagode, A
Klančnik, G
Bizjak, M
Kovačević, D
Kosec, B
Dervarič, E
Zorc, B
Kosec, L
description The paper focuses, first, on the characterization of the whiskers on the surface of grey cast iron and second, it gives an explanation of whiskers growth based on thermodynamic calculations. The whiskers were observed on the surface of hot plates for the electric stove after black-oxide-coating (blackening) performed the furnace at 650°C in order to produce a protective layer mainly of magnetite (Fe3O4). However, the whiskers caused brown spots on dark grey surface and thus, the surface was aesthetically damaged. The investigations confirmed that whiskers are of hematite (Fe2O3); however, the thermodynamic calculations present that hematite may be formed as a result of the oxidation of magnetite if the partial pressure of oxygen is increased during the blackening.
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source DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals
subjects grey cast iron
hematite (Fe2O3)
magnetite (Fe3O4)
whiskers
title Structural and thermodynamic analysis of whiskers on the surface of grey cast iron
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