Formation of NiWO₄ during high temperature oxidation of cube textured Ni-3%W substrates

Thomas Woodcock; Yim Cheung; James Grenfell; John Abell

doi:10.1088/0953-2048/18/5/024

Formation of NiWO₄ during high temperature oxidation of cube textured Ni-3%W substrates

Thomas Woodcock, Yim Cheung, James Grenfell, John Abell

Metallurgy and Materials

Research output: Contribution to journal › Article

9 Citations (Scopus)

Abstract

Cube textured Ni-3 at.% W tapes were heated to temperatures in the range 800-1200 degrees C in flowing oxygen and either air-quenched or held for 1 h and furnace cooled. Cross-sectional backscattered electron images (BSEIs) and energy dispersive x-ray (EDX) analysis showed the formation of the ternary oxide NiWO4 at temperatures greater than 1000 degrees C in addition to the usual NiO. The nickel tungstate phase appeared first as a layer at the metal/NiO interface and then as internal oxides within the substrate. At some temperatures, the presence of this phase was observed to cause buckling and catastrophic spallation of the oxide.

Original language	English
Pages (from-to)	721 -725
Number of pages	7005
Journal	Superconductor Science & Technology
Volume	18
Issue number	5
DOIs	https://doi.org/10.1088/0953-2048/18/5/024
Publication status	Published - 1 May 2005

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title = "Formation of NiWO₄ during high temperature oxidation of cube textured Ni-3%W substrates",

abstract = "Cube textured Ni-3 at.% W tapes were heated to temperatures in the range 800-1200 degrees C in flowing oxygen and either air-quenched or held for 1 h and furnace cooled. Cross-sectional backscattered electron images (BSEIs) and energy dispersive x-ray (EDX) analysis showed the formation of the ternary oxide NiWO4 at temperatures greater than 1000 degrees C in addition to the usual NiO. The nickel tungstate phase appeared first as a layer at the metal/NiO interface and then as internal oxides within the substrate. At some temperatures, the presence of this phase was observed to cause buckling and catastrophic spallation of the oxide.",

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AU - Woodcock, Thomas

AU - Cheung, Yim

AU - Grenfell, James

AU - Abell, John

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Y1 - 2005/5/1

N2 - Cube textured Ni-3 at.% W tapes were heated to temperatures in the range 800-1200 degrees C in flowing oxygen and either air-quenched or held for 1 h and furnace cooled. Cross-sectional backscattered electron images (BSEIs) and energy dispersive x-ray (EDX) analysis showed the formation of the ternary oxide NiWO4 at temperatures greater than 1000 degrees C in addition to the usual NiO. The nickel tungstate phase appeared first as a layer at the metal/NiO interface and then as internal oxides within the substrate. At some temperatures, the presence of this phase was observed to cause buckling and catastrophic spallation of the oxide.

AB - Cube textured Ni-3 at.% W tapes were heated to temperatures in the range 800-1200 degrees C in flowing oxygen and either air-quenched or held for 1 h and furnace cooled. Cross-sectional backscattered electron images (BSEIs) and energy dispersive x-ray (EDX) analysis showed the formation of the ternary oxide NiWO4 at temperatures greater than 1000 degrees C in addition to the usual NiO. The nickel tungstate phase appeared first as a layer at the metal/NiO interface and then as internal oxides within the substrate. At some temperatures, the presence of this phase was observed to cause buckling and catastrophic spallation of the oxide.

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Formation of NiWO₄ during high temperature oxidation of cube textured Ni-3%W substrates

Abstract

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