A study on the effect of nano-CeO2 dispersion on the characteristics of thermally-grown oxide (TGO) formed on NiCoCrAlY powders and coatings during isothermal oxidation
The present investigation is focusing on the high-temperature oxidation behavior of conventional and nano-CeO2 modified MCrAlY alloys, in the form of powders and coatings. Emphasis is placed upon the influence of MCrAlY alloy form on the oxidation performance. The NiCoCrAlY- CeO2 nanocomposite powde...
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| Veröffentlicht in: | Journal of alloys and compounds 2020-09, Vol.835, p.155319, Article 155319 |
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| container_title | Journal of alloys and compounds |
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| creator | Zakeri, A. Bahmani, E. Sabour Rouh Aghdam, A. Saeedi, B. Bai, M. |
| description | The present investigation is focusing on the high-temperature oxidation behavior of conventional and nano-CeO2 modified MCrAlY alloys, in the form of powders and coatings. Emphasis is placed upon the influence of MCrAlY alloy form on the oxidation performance. The NiCoCrAlY- CeO2 nanocomposite powders were prepared by mechanical milling and were subsequently thermally sprayed by high velocity oxygen-fuel (HVOF) technique. Isothermal oxidation tests were carried out at 1000 °C for up to 100 h. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and transmission electron microscopy (TEM) experimental analyses with thermodynamic equilibrium calculations were used for analysis of the oxide scales. The results indicated that the effect of nano-CeO2 addition on the oxidation properties was more pronounced in the form of coating. Moreover, the oxidation rate of the nano-CeO2 modified coating was found to be 87% lower than that of conventional coating, which was suggested to be related to the incorporation of nano-sized CeO2 dispersion into the Al2O3 scale. The different oxidation mechanisms were discussed.
[Display omitted]
•The nanocomposite NiCoCrAlY-CeO2 powders were prepared by mechanical milling.•The HVOF-sprayed coatings exhibited different oxidation behavior compared with the corresponding powders.•The beneficial effect of nano-CeO2 dispersion was more pronounced in the form of coating. |
| doi_str_mv | 10.1016/j.jallcom.2020.155319 |
| format | Article |
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[Display omitted]
•The nanocomposite NiCoCrAlY-CeO2 powders were prepared by mechanical milling.•The HVOF-sprayed coatings exhibited different oxidation behavior compared with the corresponding powders.•The beneficial effect of nano-CeO2 dispersion was more pronounced in the form of coating.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2020.155319</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Aluminum oxide ; Cerium oxides ; Coatings ; Dispersion ; Electron microscopy ; High temperature ; High-temperature oxidation ; HVOF ; MCrAlY ; Mechanical milling ; Microscopy ; Nanocomposite ; Nanocomposites ; NiCoCrAlY ; Oxidation ; Oxidation rate ; Oxidation tests ; Scale (corrosion) ; Thermodynamic equilibrium</subject><ispartof>Journal of alloys and compounds, 2020-09, Vol.835, p.155319, Article 155319</ispartof><rights>2020 Elsevier B.V.</rights><rights>Copyright Elsevier BV Sep 15, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c337t-b9b481a1fd4b2784bb3e948b92c06d7dd08a6aed0d529c31838897b53129157d3</citedby><cites>FETCH-LOGICAL-c337t-b9b481a1fd4b2784bb3e948b92c06d7dd08a6aed0d529c31838897b53129157d3</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.2020.155319$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Zakeri, A.</creatorcontrib><creatorcontrib>Bahmani, E.</creatorcontrib><creatorcontrib>Sabour Rouh Aghdam, A.</creatorcontrib><creatorcontrib>Saeedi, B.</creatorcontrib><creatorcontrib>Bai, M.</creatorcontrib><title>A study on the effect of nano-CeO2 dispersion on the characteristics of thermally-grown oxide (TGO) formed on NiCoCrAlY powders and coatings during isothermal oxidation</title><title>Journal of alloys and compounds</title><description>The present investigation is focusing on the high-temperature oxidation behavior of conventional and nano-CeO2 modified MCrAlY alloys, in the form of powders and coatings. Emphasis is placed upon the influence of MCrAlY alloy form on the oxidation performance. The NiCoCrAlY- CeO2 nanocomposite powders were prepared by mechanical milling and were subsequently thermally sprayed by high velocity oxygen-fuel (HVOF) technique. Isothermal oxidation tests were carried out at 1000 °C for up to 100 h. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and transmission electron microscopy (TEM) experimental analyses with thermodynamic equilibrium calculations were used for analysis of the oxide scales. The results indicated that the effect of nano-CeO2 addition on the oxidation properties was more pronounced in the form of coating. Moreover, the oxidation rate of the nano-CeO2 modified coating was found to be 87% lower than that of conventional coating, which was suggested to be related to the incorporation of nano-sized CeO2 dispersion into the Al2O3 scale. The different oxidation mechanisms were discussed.
[Display omitted]
•The nanocomposite NiCoCrAlY-CeO2 powders were prepared by mechanical milling.•The HVOF-sprayed coatings exhibited different oxidation behavior compared with the corresponding powders.•The beneficial effect of nano-CeO2 dispersion was more pronounced in the form of coating.</description><subject>Aluminum oxide</subject><subject>Cerium oxides</subject><subject>Coatings</subject><subject>Dispersion</subject><subject>Electron microscopy</subject><subject>High temperature</subject><subject>High-temperature oxidation</subject><subject>HVOF</subject><subject>MCrAlY</subject><subject>Mechanical milling</subject><subject>Microscopy</subject><subject>Nanocomposite</subject><subject>Nanocomposites</subject><subject>NiCoCrAlY</subject><subject>Oxidation</subject><subject>Oxidation rate</subject><subject>Oxidation tests</subject><subject>Scale (corrosion)</subject><subject>Thermodynamic equilibrium</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkctOwzAQRS0EEuXxCUiW2MAixY887BWqIl4SohtYsLIcewKO2rjYKdA_4jNxaPd4M9L4zB37XoTOKJlSQsurbtrpxcL45ZQRlnpFwancQxMqKp7lZSn30YRIVmSCC3GIjmLsCCFUcjpBPzMch7XdYN_j4R0wtC2YAfsW97r3WQ1zhq2LKwjRJWRHmXcdtBkguDg4E0c8tcMyPWOTvQX_lchvZwFfPN_NL3HrwxLsOPzkal-H2eIVr_yXTaJY9xYbrwfXv0Vs1yFV7KLfyf3JpEvfn6CDVi8inO7qMXq5vXmu77PH-d1DPXvMDOfVkDWyyQXVtLV5wyqRNw0HmYtGMkNKW1lLhC41WGILJg2noyWyapJjTNKisvwYnW91V8F_rCEOqvPr0KeViuWciXRykahiS5ngYwzQqlVwSx02ihI1hqI6tQtFjaGobShp7no7B-kLnw6CisZBb8C6kHxX1rt_FH4Bo1SZ_w</recordid><startdate>20200915</startdate><enddate>20200915</enddate><creator>Zakeri, A.</creator><creator>Bahmani, E.</creator><creator>Sabour Rouh Aghdam, A.</creator><creator>Saeedi, B.</creator><creator>Bai, M.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20200915</creationdate><title>A study on the effect of nano-CeO2 dispersion on the characteristics of thermally-grown oxide (TGO) formed on NiCoCrAlY powders and coatings during isothermal oxidation</title><author>Zakeri, A. ; Bahmani, E. ; Sabour Rouh Aghdam, A. ; Saeedi, B. ; Bai, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c337t-b9b481a1fd4b2784bb3e948b92c06d7dd08a6aed0d529c31838897b53129157d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Aluminum oxide</topic><topic>Cerium oxides</topic><topic>Coatings</topic><topic>Dispersion</topic><topic>Electron microscopy</topic><topic>High temperature</topic><topic>High-temperature oxidation</topic><topic>HVOF</topic><topic>MCrAlY</topic><topic>Mechanical milling</topic><topic>Microscopy</topic><topic>Nanocomposite</topic><topic>Nanocomposites</topic><topic>NiCoCrAlY</topic><topic>Oxidation</topic><topic>Oxidation rate</topic><topic>Oxidation tests</topic><topic>Scale (corrosion)</topic><topic>Thermodynamic equilibrium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zakeri, A.</creatorcontrib><creatorcontrib>Bahmani, E.</creatorcontrib><creatorcontrib>Sabour Rouh Aghdam, A.</creatorcontrib><creatorcontrib>Saeedi, B.</creatorcontrib><creatorcontrib>Bai, M.</creatorcontrib><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zakeri, A.</au><au>Bahmani, E.</au><au>Sabour Rouh Aghdam, A.</au><au>Saeedi, B.</au><au>Bai, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A study on the effect of nano-CeO2 dispersion on the characteristics of thermally-grown oxide (TGO) formed on NiCoCrAlY powders and coatings during isothermal oxidation</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2020-09-15</date><risdate>2020</risdate><volume>835</volume><spage>155319</spage><pages>155319-</pages><artnum>155319</artnum><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>The present investigation is focusing on the high-temperature oxidation behavior of conventional and nano-CeO2 modified MCrAlY alloys, in the form of powders and coatings. Emphasis is placed upon the influence of MCrAlY alloy form on the oxidation performance. The NiCoCrAlY- CeO2 nanocomposite powders were prepared by mechanical milling and were subsequently thermally sprayed by high velocity oxygen-fuel (HVOF) technique. Isothermal oxidation tests were carried out at 1000 °C for up to 100 h. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and transmission electron microscopy (TEM) experimental analyses with thermodynamic equilibrium calculations were used for analysis of the oxide scales. The results indicated that the effect of nano-CeO2 addition on the oxidation properties was more pronounced in the form of coating. Moreover, the oxidation rate of the nano-CeO2 modified coating was found to be 87% lower than that of conventional coating, which was suggested to be related to the incorporation of nano-sized CeO2 dispersion into the Al2O3 scale. The different oxidation mechanisms were discussed.
[Display omitted]
•The nanocomposite NiCoCrAlY-CeO2 powders were prepared by mechanical milling.•The HVOF-sprayed coatings exhibited different oxidation behavior compared with the corresponding powders.•The beneficial effect of nano-CeO2 dispersion was more pronounced in the form of coating.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2020.155319</doi></addata></record> |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Aluminum oxide Cerium oxides Coatings Dispersion Electron microscopy High temperature High-temperature oxidation HVOF MCrAlY Mechanical milling Microscopy Nanocomposite Nanocomposites NiCoCrAlY Oxidation Oxidation rate Oxidation tests Scale (corrosion) Thermodynamic equilibrium |
| title | A study on the effect of nano-CeO2 dispersion on the characteristics of thermally-grown oxide (TGO) formed on NiCoCrAlY powders and coatings during isothermal oxidation |
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