A calculation method for analysis of SIMS spectra from oxidation of metals in H2 16O/H2 18O/16O2 gas mixtures
Identifieur interne : 003156 ( Main/Exploration ); précédent : 003155; suivant : 003157A calculation method for analysis of SIMS spectra from oxidation of metals in H2 16O/H2 18O/16O2 gas mixtures
Auteurs : Q. Lu [Suède] ; G. Hultquist [Suède] ; K. L. Tan [Singapour] ; T. Kermark [Suède]Source :
- Surface and Interface Analysis [ 0142-2421 ] ; 1993-07.
Abstract
A calculation method for the secondary ion mass spectrometry (SIMS) analysis of the reaction of a pure metal with gas mixtures of water and oxygen is introduced. Equation systems are to be solved, each expressed as: Y = A × X, where Y is an amplitude column measured from the SIMS spectrum, A is a matrix constructed from the relative abundances of isotopes of the metal and X is an unknown amplitude column of the relevant species MeaOHb±(a = 1, 2; b = 0, 1, 2 and 3). The applicability of the calculation method has been tested in SIMS analysis of ex situ‐grown iron oxides with different and known 18O contents. In in situ oxidation, measurement of the ratio of H216O/H218O in the metal–water–oxygen reaction allows fractions of O in the species MeaOHb+ that originate from water to be calculated. Data from such calculations have been used to study the initial stage of the reaction of Fe and Cr in H216O/H218O/16O2 gas mixtures. The results are interpreted in terms of coupled/uncoupled reaction type, reactivity of metal to water relative to oxygen in the mixed gas and degree of dissociation of water.
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DOI: 10.1002/sia.740200806
Affiliations:
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Hultquist</name><affiliation wicri:level="1"><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Applied Electrochemistry and Corrosion Science, The Royal Institute of Technology, S‐10044 Stockholm</wicri:regionArea><wicri:noRegion>S‐10044 Stockholm</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Physical Chemistry, The Royal Institute of Technology, S‐10044 Stockholm</wicri:regionArea><wicri:noRegion>S‐10044 Stockholm</wicri:noRegion></affiliation></author><author><name sortKey="Tan, K L" sort="Tan, K L" uniqKey="Tan K" first="K. L." last="Tan">K. L. 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Interface Anal.</title><idno type="ISSN">0142-2421</idno><idno type="eISSN">1096-9918</idno><imprint><publisher>John Wiley & Sons Ltd.</publisher><pubPlace>Sussex</pubPlace><date type="published" when="1993-07">1993-07</date><biblScope unit="volume">20</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page" from="645">645</biblScope><biblScope unit="page" to="650">650</biblScope></imprint><idno type="ISSN">0142-2421</idno></series><idno type="istex">4033D7EE929196493C8A6FA40782081CD4D95BAA</idno><idno type="DOI">10.1002/sia.740200806</idno><idno type="ArticleID">SIA740200806</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0142-2421</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A calculation method for the secondary ion mass spectrometry (SIMS) analysis of the reaction of a pure metal with gas mixtures of water and oxygen is introduced. Equation systems are to be solved, each expressed as: Y = A × X, where Y is an amplitude column measured from the SIMS spectrum, A is a matrix constructed from the relative abundances of isotopes of the metal and X is an unknown amplitude column of the relevant species MeaOHb±(a = 1, 2; b = 0, 1, 2 and 3). The applicability of the calculation method has been tested in SIMS analysis of ex situ‐grown iron oxides with different and known 18O contents. In in situ oxidation, measurement of the ratio of H216O/H218O in the metal–water–oxygen reaction allows fractions of O in the species MeaOHb+ that originate from water to be calculated. Data from such calculations have been used to study the initial stage of the reaction of Fe and Cr in H216O/H218O/16O2 gas mixtures. The results are interpreted in terms of coupled/uncoupled reaction type, reactivity of metal to water relative to oxygen in the mixed gas and degree of dissociation of water.</div></front></TEI><affiliations><list><country><li>Singapour</li><li>Suède</li></country><orgName><li>Université nationale de Singapour</li></orgName></list><tree><country name="Suède"><noRegion><name sortKey="Lu, Q" sort="Lu, Q" uniqKey="Lu Q" first="Q." last="Lu">Q. Lu</name></noRegion><name sortKey=" Kermark, T" sort=" Kermark, T" uniqKey=" Kermark T" first="T." last=" Kermark">T. Kermark</name><name sortKey="Hultquist, G" sort="Hultquist, G" uniqKey="Hultquist G" first="G." last="Hultquist">G. Hultquist</name><name sortKey="Hultquist, G" sort="Hultquist, G" uniqKey="Hultquist G" first="G." last="Hultquist">G. Hultquist</name></country><country name="Singapour"><noRegion><name sortKey="Tan, K L" sort="Tan, K L" uniqKey="Tan K" first="K. L." last="Tan">K. L. Tan</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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