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Effect of the ambient atmosphere on the surface reactivity of materials for the realization of reference mass standards

By Paul-André Meury, A.M. Huntz, Régine Molins, M. Herbst-Ghysel and C. Severac

Abstract

International audienceSecondary mass standards are usually made of stainless steel. One of the main problems in mass metrology is the stability of such stainless steel standards. Consequently, new materials have been investigated for the realization of mass standards, and this has led to the selection of nickel-based superalloys. The stability of materials is strongly dependent on surface reactivity; accelerated oxidation tests were performed, either in dry or wet air, and after a kinetic study, microstructural analysis of the oxide films was performed by scanning electron microscopy. The structure of the oxide films was also characterized by grazing x-ray diffraction and finally by x-ray photoelectron spectrometry (XPS) analysis. XPS associated with sputtering by argon ions allowed us to differentiate the nature of the oxides from the outer surface to a given depth in the film

Topics: [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Publisher: 'IOP Publishing'
Year: 2007
DOI identifier: 10.1088/0026-1394/44/5/001
OAI identifier: oai:HAL:hal-00165965v1
Provided by: HAL-MINES ParisTech
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