Morphology of oxide scales formed on chromium-silicon alloys at high temperatures
[Display omitted] •Addition of Si to Cr significantly changed the oxide scale morphology.•Si additions led to SiO2 growth underneath the chromia scale.•The initially amorphous SiO2 crystallized to cristobalite at 1200°C.•Fine-grained chromia scale contained abnormally large single crystals.•Single c...
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| Veröffentlicht in: | Corrosion science 2020-11, Vol.176, p.109023, Article 109023 |
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| creator | Solimani, Ali Nguyen, Thuan Zhang, Jianqiang Young, David J. Schütze, Michael Galetz, Mathias C. |
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•Addition of Si to Cr significantly changed the oxide scale morphology.•Si additions led to SiO2 growth underneath the chromia scale.•The initially amorphous SiO2 crystallized to cristobalite at 1200°C.•Fine-grained chromia scale contained abnormally large single crystals.•Single crystals are most-likely grown via a gas phase transport mechanism.
Oxide scales formed on chromium-silicon model alloys at 1200 °C in synthetic air were characterized using electron microscopy and diffraction methods. Additions of Si to chromium led to SiO2 growth underneath the chromia scale. The chromia scale was mostly fine-grained, but also contained numerous abnormally large single crystals growing out of the scale surface. Evaluation of mass transport rates shows that growth of the large grains can be supported by gas phase transport of CrO3, but not by lattice diffusion. |
| doi_str_mv | 10.1016/j.corsci.2020.109023 |
| format | Article |
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•Addition of Si to Cr significantly changed the oxide scale morphology.•Si additions led to SiO2 growth underneath the chromia scale.•The initially amorphous SiO2 crystallized to cristobalite at 1200°C.•Fine-grained chromia scale contained abnormally large single crystals.•Single crystals are most-likely grown via a gas phase transport mechanism.
Oxide scales formed on chromium-silicon model alloys at 1200 °C in synthetic air were characterized using electron microscopy and diffraction methods. Additions of Si to chromium led to SiO2 growth underneath the chromia scale. The chromia scale was mostly fine-grained, but also contained numerous abnormally large single crystals growing out of the scale surface. Evaluation of mass transport rates shows that growth of the large grains can be supported by gas phase transport of CrO3, but not by lattice diffusion.</description><identifier>ISSN: 0010-938X</identifier><identifier>EISSN: 1879-0496</identifier><identifier>DOI: 10.1016/j.corsci.2020.109023</identifier><language>eng</language><publisher>Amsterdam: Elsevier Ltd</publisher><subject>Chromia ; Chromium ; Chromium base alloys ; Chromium oxides ; Cr-Si ; Crystal growth ; High temperature oxidation ; Morphology ; Scale (corrosion) ; Scale morphology ; Silicon dioxide ; Single crystal ; Single crystals ; Vapor phases</subject><ispartof>Corrosion science, 2020-11, Vol.176, p.109023, Article 109023</ispartof><rights>2020 Elsevier Ltd</rights><rights>Copyright Elsevier BV Nov 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c334t-b2e3b37f8fb40dd61b275a0eaa714327a9ae45a17262f5035bb293d8d99ae3323</citedby><cites>FETCH-LOGICAL-c334t-b2e3b37f8fb40dd61b275a0eaa714327a9ae45a17262f5035bb293d8d99ae3323</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.corsci.2020.109023$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Solimani, Ali</creatorcontrib><creatorcontrib>Nguyen, Thuan</creatorcontrib><creatorcontrib>Zhang, Jianqiang</creatorcontrib><creatorcontrib>Young, David J.</creatorcontrib><creatorcontrib>Schütze, Michael</creatorcontrib><creatorcontrib>Galetz, Mathias C.</creatorcontrib><title>Morphology of oxide scales formed on chromium-silicon alloys at high temperatures</title><title>Corrosion science</title><description>[Display omitted]
•Addition of Si to Cr significantly changed the oxide scale morphology.•Si additions led to SiO2 growth underneath the chromia scale.•The initially amorphous SiO2 crystallized to cristobalite at 1200°C.•Fine-grained chromia scale contained abnormally large single crystals.•Single crystals are most-likely grown via a gas phase transport mechanism.
Oxide scales formed on chromium-silicon model alloys at 1200 °C in synthetic air were characterized using electron microscopy and diffraction methods. Additions of Si to chromium led to SiO2 growth underneath the chromia scale. The chromia scale was mostly fine-grained, but also contained numerous abnormally large single crystals growing out of the scale surface. Evaluation of mass transport rates shows that growth of the large grains can be supported by gas phase transport of CrO3, but not by lattice diffusion.</description><subject>Chromia</subject><subject>Chromium</subject><subject>Chromium base alloys</subject><subject>Chromium oxides</subject><subject>Cr-Si</subject><subject>Crystal growth</subject><subject>High temperature oxidation</subject><subject>Morphology</subject><subject>Scale (corrosion)</subject><subject>Scale morphology</subject><subject>Silicon dioxide</subject><subject>Single crystal</subject><subject>Single crystals</subject><subject>Vapor phases</subject><issn>0010-938X</issn><issn>1879-0496</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kFtLxDAQhYMouK7-Ax8CPnedXHp7EWTxBooICr6FNJ1uU9rNmrTi_nuz1GefBs6cc4b5CLlksGLAsutuZZwPxq448INUAhdHZMGKvExAltkxWQAwSEpRfJ6SsxA6gOhksCBvL87vWte7zZ66hrofWyMNRvcYaOP8gDV1W2pa7wY7DUmwvTVR0H3v9oHqkbZ209IRhx16PU4ewzk5aXQf8OJvLsnH_d37-jF5fn14Wt8-J0YIOSYVR1GJvCmaSkJdZ6zieaoBtc6ZFDzXpUaZapbzjDcpiLSqeCnqoi7jQgguluRq7t159zVhGFXnJr-NJxWXecEYFJJFl5xdxrsQPDZq5-2g_V4xUAd4qlMzPHWAp2Z4MXYzxzB-8G3Rq-jArcHaejSjqp39v-AXVcV6Ng</recordid><startdate>202011</startdate><enddate>202011</enddate><creator>Solimani, Ali</creator><creator>Nguyen, Thuan</creator><creator>Zhang, Jianqiang</creator><creator>Young, David J.</creator><creator>Schütze, Michael</creator><creator>Galetz, Mathias C.</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SE</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope></search><sort><creationdate>202011</creationdate><title>Morphology of oxide scales formed on chromium-silicon alloys at high temperatures</title><author>Solimani, Ali ; Nguyen, Thuan ; Zhang, Jianqiang ; Young, David J. ; Schütze, Michael ; Galetz, Mathias C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-b2e3b37f8fb40dd61b275a0eaa714327a9ae45a17262f5035bb293d8d99ae3323</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Chromia</topic><topic>Chromium</topic><topic>Chromium base alloys</topic><topic>Chromium oxides</topic><topic>Cr-Si</topic><topic>Crystal growth</topic><topic>High temperature oxidation</topic><topic>Morphology</topic><topic>Scale (corrosion)</topic><topic>Scale morphology</topic><topic>Silicon dioxide</topic><topic>Single crystal</topic><topic>Single crystals</topic><topic>Vapor phases</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Solimani, Ali</creatorcontrib><creatorcontrib>Nguyen, Thuan</creatorcontrib><creatorcontrib>Zhang, Jianqiang</creatorcontrib><creatorcontrib>Young, David J.</creatorcontrib><creatorcontrib>Schütze, Michael</creatorcontrib><creatorcontrib>Galetz, Mathias C.</creatorcontrib><collection>CrossRef</collection><collection>Corrosion Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><jtitle>Corrosion science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Solimani, Ali</au><au>Nguyen, Thuan</au><au>Zhang, Jianqiang</au><au>Young, David J.</au><au>Schütze, Michael</au><au>Galetz, Mathias C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Morphology of oxide scales formed on chromium-silicon alloys at high temperatures</atitle><jtitle>Corrosion science</jtitle><date>2020-11</date><risdate>2020</risdate><volume>176</volume><spage>109023</spage><pages>109023-</pages><artnum>109023</artnum><issn>0010-938X</issn><eissn>1879-0496</eissn><abstract>[Display omitted]
•Addition of Si to Cr significantly changed the oxide scale morphology.•Si additions led to SiO2 growth underneath the chromia scale.•The initially amorphous SiO2 crystallized to cristobalite at 1200°C.•Fine-grained chromia scale contained abnormally large single crystals.•Single crystals are most-likely grown via a gas phase transport mechanism.
Oxide scales formed on chromium-silicon model alloys at 1200 °C in synthetic air were characterized using electron microscopy and diffraction methods. Additions of Si to chromium led to SiO2 growth underneath the chromia scale. The chromia scale was mostly fine-grained, but also contained numerous abnormally large single crystals growing out of the scale surface. Evaluation of mass transport rates shows that growth of the large grains can be supported by gas phase transport of CrO3, but not by lattice diffusion.</abstract><cop>Amsterdam</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.corsci.2020.109023</doi></addata></record> |
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| subjects | Chromia Chromium Chromium base alloys Chromium oxides Cr-Si Crystal growth High temperature oxidation Morphology Scale (corrosion) Scale morphology Silicon dioxide Single crystal Single crystals Vapor phases |
| title | Morphology of oxide scales formed on chromium-silicon alloys at high temperatures |
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