Oxidation of a depleted uranium‐5 wt% molybdenum (U‐5Mo) alloy in UHV by AES and XPS
Early stage oxidation of a dilute‐depleted uranium‐molybdenum alloy was analysed in situ under ultra‐high vacuum conditions by AES and XPS. At the equivalent of less than 300 ns at 1‐atm O2, U‐5Mo oxidizes to form stoichiometric UO2. No molybdenum oxidation is observed. After an oxygen dose of appro...
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| Veröffentlicht in: | Surface and interface analysis 2019-08, Vol.51 (8), p.849-856 |
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| container_title | Surface and interface analysis |
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| creator | Bacon, Simon R. Brierley, Martin Baker, Mark A. Watts, John F. |
| description | Early stage oxidation of a dilute‐depleted uranium‐molybdenum alloy was analysed in situ under ultra‐high vacuum conditions by AES and XPS. At the equivalent of less than 300 ns at 1‐atm O2, U‐5Mo oxidizes to form stoichiometric UO2. No molybdenum oxidation is observed. After an oxygen dose of approximately 39 L, the oxide layer approached a limiting thickness of approximately 2.4 nm. The oxidation kinetics followed a logarithmic rate law, with the best fit to the experimental data for the oxide thickness, d, being given by d = 1.26 log(0.12t + 0.56). Changes in oxygen KLL and 1s peak positions associated with transformation from chemisorbed oxygen to metal oxide were observed at similar oxygen doses of 2.3 and 2.6 L O2 by AES and XPS, respectively, which opens up the possibility of using well‐characterized XPS chemical information to inform Auger peak shifts. |
| doi_str_mv | 10.1002/sia.6659 |
| format | Article |
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At the equivalent of less than 300 ns at 1‐atm O2, U‐5Mo oxidizes to form stoichiometric UO2. No molybdenum oxidation is observed. After an oxygen dose of approximately 39 L, the oxide layer approached a limiting thickness of approximately 2.4 nm. The oxidation kinetics followed a logarithmic rate law, with the best fit to the experimental data for the oxide thickness, d, being given by d = 1.26 log(0.12t + 0.56). Changes in oxygen KLL and 1s peak positions associated with transformation from chemisorbed oxygen to metal oxide were observed at similar oxygen doses of 2.3 and 2.6 L O2 by AES and XPS, respectively, which opens up the possibility of using well‐characterized XPS chemical information to inform Auger peak shifts.</description><identifier>ISSN: 0142-2421</identifier><identifier>EISSN: 1096-9918</identifier><identifier>DOI: 10.1002/sia.6659</identifier><language>eng</language><publisher>Bognor Regis: Wiley Subscription Services, Inc</publisher><subject>AES ; Augers ; corrosion ; Depletion ; High vacuum ; Molybdenum ; Molybdenum base alloys ; Organic chemistry ; Oxidation ; Oxygen ; Reaction kinetics ; Thickness ; Uranium ; Uranium dioxide ; XPS</subject><ispartof>Surface and interface analysis, 2019-08, Vol.51 (8), p.849-856</ispartof><rights>2019 The Authors Packaging Technology and Science Published by John Wiley & Sons Ltd</rights><rights>2019 John Wiley & Sons, Ltd.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3279-82037b293697856fbadcfb317b6964878f3f7aaa631d841c06de710911b90b7e3</citedby><cites>FETCH-LOGICAL-c3279-82037b293697856fbadcfb317b6964878f3f7aaa631d841c06de710911b90b7e3</cites><orcidid>0000-0002-7361-9889 ; 0000-0003-2109-0335 ; 0000-0002-4771-0275</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fsia.6659$$EPDF$$P50$$Gwiley$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fsia.6659$$EHTML$$P50$$Gwiley$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids></links><search><creatorcontrib>Bacon, Simon R.</creatorcontrib><creatorcontrib>Brierley, Martin</creatorcontrib><creatorcontrib>Baker, Mark A.</creatorcontrib><creatorcontrib>Watts, John F.</creatorcontrib><title>Oxidation of a depleted uranium‐5 wt% molybdenum (U‐5Mo) alloy in UHV by AES and XPS</title><title>Surface and interface analysis</title><description>Early stage oxidation of a dilute‐depleted uranium‐molybdenum alloy was analysed in situ under ultra‐high vacuum conditions by AES and XPS. At the equivalent of less than 300 ns at 1‐atm O2, U‐5Mo oxidizes to form stoichiometric UO2. No molybdenum oxidation is observed. After an oxygen dose of approximately 39 L, the oxide layer approached a limiting thickness of approximately 2.4 nm. The oxidation kinetics followed a logarithmic rate law, with the best fit to the experimental data for the oxide thickness, d, being given by d = 1.26 log(0.12t + 0.56). Changes in oxygen KLL and 1s peak positions associated with transformation from chemisorbed oxygen to metal oxide were observed at similar oxygen doses of 2.3 and 2.6 L O2 by AES and XPS, respectively, which opens up the possibility of using well‐characterized XPS chemical information to inform Auger peak shifts.</description><subject>AES</subject><subject>Augers</subject><subject>corrosion</subject><subject>Depletion</subject><subject>High vacuum</subject><subject>Molybdenum</subject><subject>Molybdenum base alloys</subject><subject>Organic chemistry</subject><subject>Oxidation</subject><subject>Oxygen</subject><subject>Reaction kinetics</subject><subject>Thickness</subject><subject>Uranium</subject><subject>Uranium dioxide</subject><subject>XPS</subject><issn>0142-2421</issn><issn>1096-9918</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><recordid>eNp10MtKw0AUBuBBFKxV8BEGRKiL1Lkkc1kWqbZQqVAr3Q0zmQmkJJmaSajZ-Qg-o09iat26OnD4-A_nB-AaozFGiNyHXI8ZS-QJGGAkWSQlFqdggHBMIhITfA4uQtgihAQVbAA2y4_c6ib3FfQZ1NC6XeEaZ2Fb6ypvy-_PrwTum1tY-qIz1lVtCUfrw_bZ30FdFL6DeQXXszdoOjiZrqCuLNy8rC7BWaaL4K7-5hCsH6evD7NosXyaP0wWUUoJl5EgiHJDJGWSi4RlRts0MxRzwySLBRcZzbjWmlFsRYxTxKzj_WMYG4kMd3QIbo65u9q_ty40auvbuupPKkISnsQUo7hXo6NKax9C7TK1q_NS153CSB16U31v6tBbT6Mj3eeF6_51ajWf_PofYbRs3A</recordid><startdate>201908</startdate><enddate>201908</enddate><creator>Bacon, Simon R.</creator><creator>Brierley, Martin</creator><creator>Baker, Mark A.</creator><creator>Watts, John F.</creator><general>Wiley Subscription Services, Inc</general><scope>24P</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-7361-9889</orcidid><orcidid>https://orcid.org/0000-0003-2109-0335</orcidid><orcidid>https://orcid.org/0000-0002-4771-0275</orcidid></search><sort><creationdate>201908</creationdate><title>Oxidation of a depleted uranium‐5 wt% molybdenum (U‐5Mo) alloy in UHV by AES and XPS</title><author>Bacon, Simon R. ; Brierley, Martin ; Baker, Mark A. ; Watts, John F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3279-82037b293697856fbadcfb317b6964878f3f7aaa631d841c06de710911b90b7e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>AES</topic><topic>Augers</topic><topic>corrosion</topic><topic>Depletion</topic><topic>High vacuum</topic><topic>Molybdenum</topic><topic>Molybdenum base alloys</topic><topic>Organic chemistry</topic><topic>Oxidation</topic><topic>Oxygen</topic><topic>Reaction kinetics</topic><topic>Thickness</topic><topic>Uranium</topic><topic>Uranium dioxide</topic><topic>XPS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bacon, Simon R.</creatorcontrib><creatorcontrib>Brierley, Martin</creatorcontrib><creatorcontrib>Baker, Mark A.</creatorcontrib><creatorcontrib>Watts, John F.</creatorcontrib><collection>Wiley Online Library Open Access</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Surface and interface analysis</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bacon, Simon R.</au><au>Brierley, Martin</au><au>Baker, Mark A.</au><au>Watts, John F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Oxidation of a depleted uranium‐5 wt% molybdenum (U‐5Mo) alloy in UHV by AES and XPS</atitle><jtitle>Surface and interface analysis</jtitle><date>2019-08</date><risdate>2019</risdate><volume>51</volume><issue>8</issue><spage>849</spage><epage>856</epage><pages>849-856</pages><issn>0142-2421</issn><eissn>1096-9918</eissn><abstract>Early stage oxidation of a dilute‐depleted uranium‐molybdenum alloy was analysed in situ under ultra‐high vacuum conditions by AES and XPS. At the equivalent of less than 300 ns at 1‐atm O2, U‐5Mo oxidizes to form stoichiometric UO2. No molybdenum oxidation is observed. After an oxygen dose of approximately 39 L, the oxide layer approached a limiting thickness of approximately 2.4 nm. The oxidation kinetics followed a logarithmic rate law, with the best fit to the experimental data for the oxide thickness, d, being given by d = 1.26 log(0.12t + 0.56). Changes in oxygen KLL and 1s peak positions associated with transformation from chemisorbed oxygen to metal oxide were observed at similar oxygen doses of 2.3 and 2.6 L O2 by AES and XPS, respectively, which opens up the possibility of using well‐characterized XPS chemical information to inform Auger peak shifts.</abstract><cop>Bognor Regis</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1002/sia.6659</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-7361-9889</orcidid><orcidid>https://orcid.org/0000-0003-2109-0335</orcidid><orcidid>https://orcid.org/0000-0002-4771-0275</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | Surface and interface analysis, 2019-08, Vol.51 (8), p.849-856 |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | AES Augers corrosion Depletion High vacuum Molybdenum Molybdenum base alloys Organic chemistry Oxidation Oxygen Reaction kinetics Thickness Uranium Uranium dioxide XPS |
| title | Oxidation of a depleted uranium‐5 wt% molybdenum (U‐5Mo) alloy in UHV by AES and XPS |
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