Hot corrosion of nanostructured CoNiCrAlYSi coatings deposited by high velocity oxy fuel process
•Hot corrosion of a nanostructured MCrAlY coating was studied.•Cryomilling was used to prepare nanostructured powders.•The corrosion improvement was attributed to α-Al2O3 particles. This paper focuses on the structure and cyclic hot corrosion behavior of nanostructured MCrAlY coatings used in therma...
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| Veröffentlicht in: | Journal of alloys and compounds 2014-01, Vol.584, p.303-307 |
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| container_title | Journal of alloys and compounds |
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| creator | Yaghtin, A.H. Javadpour, S. Shariat, M.H. |
| description | •Hot corrosion of a nanostructured MCrAlY coating was studied.•Cryomilling was used to prepare nanostructured powders.•The corrosion improvement was attributed to α-Al2O3 particles.
This paper focuses on the structure and cyclic hot corrosion behavior of nanostructured MCrAlY coatings used in thermal barrier coatings of gas turbines as the bond coat. Cryomilling in a liquid nitrogen environment was used to prepare nanostructured CoNiCrAlYSi powders, as characterized by scanning electron microscopy and X-ray diffraction. Also, the long-term hot corrosion resistance of the coating deposited by high velocity oxy fuel thermal spraying of the cryomilled powders was studied in a molten salt medium of Na2SO4–Na2VO3 at 880°C up to 640h. According to the results, the cryomilling process improved the corrosion resistance of the nanostructured coating, as compared with coarse-grained CoNiCrAlYSi coatings. This improvement was attributed to some α-Al2O3 particles dispersed in the structure, created by cryomilling, and high-diffusivity paths, created by nanocrystallization, which favors the formation of a continuous α-Al2O3 barrier layer on the top of the coating. |
| doi_str_mv | 10.1016/j.jallcom.2013.09.047 |
| format | Article |
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This paper focuses on the structure and cyclic hot corrosion behavior of nanostructured MCrAlY coatings used in thermal barrier coatings of gas turbines as the bond coat. Cryomilling in a liquid nitrogen environment was used to prepare nanostructured CoNiCrAlYSi powders, as characterized by scanning electron microscopy and X-ray diffraction. Also, the long-term hot corrosion resistance of the coating deposited by high velocity oxy fuel thermal spraying of the cryomilled powders was studied in a molten salt medium of Na2SO4–Na2VO3 at 880°C up to 640h. According to the results, the cryomilling process improved the corrosion resistance of the nanostructured coating, as compared with coarse-grained CoNiCrAlYSi coatings. This improvement was attributed to some α-Al2O3 particles dispersed in the structure, created by cryomilling, and high-diffusivity paths, created by nanocrystallization, which favors the formation of a continuous α-Al2O3 barrier layer on the top of the coating.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2013.09.047</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>Alloys ; Applied sciences ; Coating materials ; Coatings ; Corrosion ; Corrosion environments ; Corrosion resistance ; Deposition ; Diffraction ; Exact sciences and technology ; Fuels ; High-temperature alloys ; Hot corrosion ; Metals. Metallurgy ; Nanostructure ; Nanostructured materials</subject><ispartof>Journal of alloys and compounds, 2014-01, Vol.584, p.303-307</ispartof><rights>2013 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c438t-87a2a3f0c4c5fda3c033fc011a5677c5de2f4081fb4b43b764f855591a9694bf3</citedby><cites>FETCH-LOGICAL-c438t-87a2a3f0c4c5fda3c033fc011a5677c5de2f4081fb4b43b764f855591a9694bf3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jallcom.2013.09.047$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=28264595$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Yaghtin, A.H.</creatorcontrib><creatorcontrib>Javadpour, S.</creatorcontrib><creatorcontrib>Shariat, M.H.</creatorcontrib><title>Hot corrosion of nanostructured CoNiCrAlYSi coatings deposited by high velocity oxy fuel process</title><title>Journal of alloys and compounds</title><description>•Hot corrosion of a nanostructured MCrAlY coating was studied.•Cryomilling was used to prepare nanostructured powders.•The corrosion improvement was attributed to α-Al2O3 particles.
This paper focuses on the structure and cyclic hot corrosion behavior of nanostructured MCrAlY coatings used in thermal barrier coatings of gas turbines as the bond coat. Cryomilling in a liquid nitrogen environment was used to prepare nanostructured CoNiCrAlYSi powders, as characterized by scanning electron microscopy and X-ray diffraction. Also, the long-term hot corrosion resistance of the coating deposited by high velocity oxy fuel thermal spraying of the cryomilled powders was studied in a molten salt medium of Na2SO4–Na2VO3 at 880°C up to 640h. According to the results, the cryomilling process improved the corrosion resistance of the nanostructured coating, as compared with coarse-grained CoNiCrAlYSi coatings. This improvement was attributed to some α-Al2O3 particles dispersed in the structure, created by cryomilling, and high-diffusivity paths, created by nanocrystallization, which favors the formation of a continuous α-Al2O3 barrier layer on the top of the coating.</description><subject>Alloys</subject><subject>Applied sciences</subject><subject>Coating materials</subject><subject>Coatings</subject><subject>Corrosion</subject><subject>Corrosion environments</subject><subject>Corrosion resistance</subject><subject>Deposition</subject><subject>Diffraction</subject><subject>Exact sciences and technology</subject><subject>Fuels</subject><subject>High-temperature alloys</subject><subject>Hot corrosion</subject><subject>Metals. Metallurgy</subject><subject>Nanostructure</subject><subject>Nanostructured materials</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqNkT9vFDEUxC0EEkfgIyC5QaLZxV7_WbtC0QkIUgQFUFAZ71s78cm3PmxvxH17HN0pbVK94v1mRppB6C0lPSVUftj1OxsjpH0_EMp6onvCx2doQ9XIOi6lfo42RA-iU0ypl-hVKTtCCNWMbtCfq1QxpJxTCWnByePFLqnUvEJds5vxNn0L23wZf_8IjbM1LDcFz-7Q-Nre0xHfhptbfOdiglCPOP07Yr-6iA85gSvlNXrhbSzuzfleoF-fP_3cXnXX37983V5ed8CZqp0a7WCZJ8BB-NkyIIx5IJRaIccRxOwGz4mifuITZ9MouVdCCE2tlppPnl2g9yfflvt3daWafSjgYrSLS2sxtNloPrBRP44KRrSWUtCnoWqgTDZUnFBoXZbsvDnksLf5aCgx9zuZnTnvZO53MkSbtlPTvTtH2AI2-mwXCOVBPKhBcqFF4z6eONdavAsumwLBLeDmkB1UM6fwSNJ_2xyrpQ</recordid><startdate>20140125</startdate><enddate>20140125</enddate><creator>Yaghtin, A.H.</creator><creator>Javadpour, S.</creator><creator>Shariat, M.H.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SE</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>7QF</scope></search><sort><creationdate>20140125</creationdate><title>Hot corrosion of nanostructured CoNiCrAlYSi coatings deposited by high velocity oxy fuel process</title><author>Yaghtin, A.H. ; Javadpour, S. ; Shariat, M.H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c438t-87a2a3f0c4c5fda3c033fc011a5677c5de2f4081fb4b43b764f855591a9694bf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Alloys</topic><topic>Applied sciences</topic><topic>Coating materials</topic><topic>Coatings</topic><topic>Corrosion</topic><topic>Corrosion environments</topic><topic>Corrosion resistance</topic><topic>Deposition</topic><topic>Diffraction</topic><topic>Exact sciences and technology</topic><topic>Fuels</topic><topic>High-temperature alloys</topic><topic>Hot corrosion</topic><topic>Metals. Metallurgy</topic><topic>Nanostructure</topic><topic>Nanostructured materials</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yaghtin, A.H.</creatorcontrib><creatorcontrib>Javadpour, S.</creatorcontrib><creatorcontrib>Shariat, M.H.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Corrosion Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Aluminium Industry Abstracts</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yaghtin, A.H.</au><au>Javadpour, S.</au><au>Shariat, M.H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hot corrosion of nanostructured CoNiCrAlYSi coatings deposited by high velocity oxy fuel process</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2014-01-25</date><risdate>2014</risdate><volume>584</volume><spage>303</spage><epage>307</epage><pages>303-307</pages><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>•Hot corrosion of a nanostructured MCrAlY coating was studied.•Cryomilling was used to prepare nanostructured powders.•The corrosion improvement was attributed to α-Al2O3 particles.
This paper focuses on the structure and cyclic hot corrosion behavior of nanostructured MCrAlY coatings used in thermal barrier coatings of gas turbines as the bond coat. Cryomilling in a liquid nitrogen environment was used to prepare nanostructured CoNiCrAlYSi powders, as characterized by scanning electron microscopy and X-ray diffraction. Also, the long-term hot corrosion resistance of the coating deposited by high velocity oxy fuel thermal spraying of the cryomilled powders was studied in a molten salt medium of Na2SO4–Na2VO3 at 880°C up to 640h. According to the results, the cryomilling process improved the corrosion resistance of the nanostructured coating, as compared with coarse-grained CoNiCrAlYSi coatings. This improvement was attributed to some α-Al2O3 particles dispersed in the structure, created by cryomilling, and high-diffusivity paths, created by nanocrystallization, which favors the formation of a continuous α-Al2O3 barrier layer on the top of the coating.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2013.09.047</doi><tpages>5</tpages></addata></record> |
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| ispartof | Journal of alloys and compounds, 2014-01, Vol.584, p.303-307 |
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| language | eng |
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| subjects | Alloys Applied sciences Coating materials Coatings Corrosion Corrosion environments Corrosion resistance Deposition Diffraction Exact sciences and technology Fuels High-temperature alloys Hot corrosion Metals. Metallurgy Nanostructure Nanostructured materials |
| title | Hot corrosion of nanostructured CoNiCrAlYSi coatings deposited by high velocity oxy fuel process |
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