A study of the microstructure and mechanical properties of SiC coatings on spherical particles
We have investigated the effect of the microstructure on the mechanical properties of three nearly stoichiometric SiC coatings (SiC, SiC+C and SiC+Si coating), which were coated onto spherical particles as simulated nuclear fuel particles by fluidized-bed chemical vapour deposition (FBCVD). The mech...
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| Veröffentlicht in: | Journal of the European Ceramic Society 2012-07, Vol.32 (8), p.1775-1786 |
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| container_issue | 8 |
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| container_title | Journal of the European Ceramic Society |
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| creator | Zhang, Huixing López-Honorato, Eddie Javed, Athar Zhao, Xiaofeng Tan, Jun Xiao, Ping |
| description | We have investigated the effect of the microstructure on the mechanical properties of three nearly stoichiometric SiC coatings (SiC, SiC+C and SiC+Si coating), which were coated onto spherical particles as simulated nuclear fuel particles by fluidized-bed chemical vapour deposition (FBCVD). The mechanical properties of the SiC coatings were studied using micro- and nano-indentation. The microstructure was characterised using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM was also used to elucidate the deformation behaviour under the indentation. The FBCVD SiC coatings studied exhibited a higher hardness than conventional CVD SiC coatings, and SiC coating gave the highest hardness among the three coatings. TEM confirmed that the presence of pores affect the Young's modulus of SiC coatings. The high hardness was attributed to the high density of dislocations and their interactions. The initiation and propagation of micro cracks under the confined shear stress was found to be responsible for the mechanism of plastic deformation. Based on this hardness-related plastic deformation mechanism, the variation of hardness in the three types of SiC coating was due to different grain morphologies. |
| doi_str_mv | 10.1016/j.jeurceramsoc.2011.12.014 |
| format | Article |
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The mechanical properties of the SiC coatings were studied using micro- and nano-indentation. The microstructure was characterised using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM was also used to elucidate the deformation behaviour under the indentation. The FBCVD SiC coatings studied exhibited a higher hardness than conventional CVD SiC coatings, and SiC coating gave the highest hardness among the three coatings. TEM confirmed that the presence of pores affect the Young's modulus of SiC coatings. The high hardness was attributed to the high density of dislocations and their interactions. The initiation and propagation of micro cracks under the confined shear stress was found to be responsible for the mechanism of plastic deformation. Based on this hardness-related plastic deformation mechanism, the variation of hardness in the three types of SiC coating was due to different grain morphologies.</description><identifier>ISSN: 0955-2219</identifier><identifier>EISSN: 1873-619X</identifier><identifier>DOI: 10.1016/j.jeurceramsoc.2011.12.014</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Coatings ; FBCVD SiC coating ; Hardness ; Indentation ; Mechanical properties ; Microstructure ; Nanostructure ; Plastic deformation ; Silicon carbide ; Sub-micrometres polycrystalline ; TEM ; Transmission electron microscopy ; Young's modulus</subject><ispartof>Journal of the European Ceramic Society, 2012-07, Vol.32 (8), p.1775-1786</ispartof><rights>2012 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c456t-79bef5b7d7d3d0ed7e00e12320e58283f8edf8ddbc92f306b0b7e4ac24f5f7063</citedby><cites>FETCH-LOGICAL-c456t-79bef5b7d7d3d0ed7e00e12320e58283f8edf8ddbc92f306b0b7e4ac24f5f7063</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jeurceramsoc.2011.12.014$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Zhang, Huixing</creatorcontrib><creatorcontrib>López-Honorato, Eddie</creatorcontrib><creatorcontrib>Javed, Athar</creatorcontrib><creatorcontrib>Zhao, Xiaofeng</creatorcontrib><creatorcontrib>Tan, Jun</creatorcontrib><creatorcontrib>Xiao, Ping</creatorcontrib><title>A study of the microstructure and mechanical properties of SiC coatings on spherical particles</title><title>Journal of the European Ceramic Society</title><description>We have investigated the effect of the microstructure on the mechanical properties of three nearly stoichiometric SiC coatings (SiC, SiC+C and SiC+Si coating), which were coated onto spherical particles as simulated nuclear fuel particles by fluidized-bed chemical vapour deposition (FBCVD). The mechanical properties of the SiC coatings were studied using micro- and nano-indentation. The microstructure was characterised using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM was also used to elucidate the deformation behaviour under the indentation. The FBCVD SiC coatings studied exhibited a higher hardness than conventional CVD SiC coatings, and SiC coating gave the highest hardness among the three coatings. TEM confirmed that the presence of pores affect the Young's modulus of SiC coatings. The high hardness was attributed to the high density of dislocations and their interactions. The initiation and propagation of micro cracks under the confined shear stress was found to be responsible for the mechanism of plastic deformation. Based on this hardness-related plastic deformation mechanism, the variation of hardness in the three types of SiC coating was due to different grain morphologies.</description><subject>Coatings</subject><subject>FBCVD SiC coating</subject><subject>Hardness</subject><subject>Indentation</subject><subject>Mechanical properties</subject><subject>Microstructure</subject><subject>Nanostructure</subject><subject>Plastic deformation</subject><subject>Silicon carbide</subject><subject>Sub-micrometres polycrystalline</subject><subject>TEM</subject><subject>Transmission electron microscopy</subject><subject>Young's modulus</subject><issn>0955-2219</issn><issn>1873-619X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqNkMtKBDEQRYMoOI7-Q3Dlpts8-hV3w_gEwYUKrgzppOKk6ceYpIX5e7sZF-50VRSce6k6CJ1TklJCi8smbWD0GrzqwqBTRihNKUsJzQ7QglYlTwoq3g7Rgog8Txij4hidhNAQQksixAK9r3CIo9nhweK4Adw57YcQ_ajj6AGr3uAO9Eb1TqsWb_2wBR8dhJl_dmusBxVd_zHtPQ7bDfg9pyZItxBO0ZFVbYCzn7lEr7c3L-v75PHp7mG9ekx0lhcxKUUNNq9LUxpuCJgSCAHKOCOQV6zitgJjK2NqLZjlpKhJXUKmNMtsbktS8CW62PdOF36OEKLsXNDQtqqHYQySFoLxiuc5-xsljFUF5VxM6NUenZ0ED1ZuveuU302QnP3LRv72L2f_kjI5-Z_C1_swTH9_OfAyaAe9BuM86CjN4P5T8w2uSZdH</recordid><startdate>20120701</startdate><enddate>20120701</enddate><creator>Zhang, Huixing</creator><creator>López-Honorato, Eddie</creator><creator>Javed, Athar</creator><creator>Zhao, Xiaofeng</creator><creator>Tan, Jun</creator><creator>Xiao, Ping</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20120701</creationdate><title>A study of the microstructure and mechanical properties of SiC coatings on spherical particles</title><author>Zhang, Huixing ; López-Honorato, Eddie ; Javed, Athar ; Zhao, Xiaofeng ; Tan, Jun ; Xiao, Ping</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c456t-79bef5b7d7d3d0ed7e00e12320e58283f8edf8ddbc92f306b0b7e4ac24f5f7063</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Coatings</topic><topic>FBCVD SiC coating</topic><topic>Hardness</topic><topic>Indentation</topic><topic>Mechanical properties</topic><topic>Microstructure</topic><topic>Nanostructure</topic><topic>Plastic deformation</topic><topic>Silicon carbide</topic><topic>Sub-micrometres polycrystalline</topic><topic>TEM</topic><topic>Transmission electron microscopy</topic><topic>Young's modulus</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhang, Huixing</creatorcontrib><creatorcontrib>López-Honorato, Eddie</creatorcontrib><creatorcontrib>Javed, Athar</creatorcontrib><creatorcontrib>Zhao, Xiaofeng</creatorcontrib><creatorcontrib>Tan, Jun</creatorcontrib><creatorcontrib>Xiao, Ping</creatorcontrib><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of the European Ceramic Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhang, Huixing</au><au>López-Honorato, Eddie</au><au>Javed, Athar</au><au>Zhao, Xiaofeng</au><au>Tan, Jun</au><au>Xiao, Ping</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A study of the microstructure and mechanical properties of SiC coatings on spherical particles</atitle><jtitle>Journal of the European Ceramic Society</jtitle><date>2012-07-01</date><risdate>2012</risdate><volume>32</volume><issue>8</issue><spage>1775</spage><epage>1786</epage><pages>1775-1786</pages><issn>0955-2219</issn><eissn>1873-619X</eissn><abstract>We have investigated the effect of the microstructure on the mechanical properties of three nearly stoichiometric SiC coatings (SiC, SiC+C and SiC+Si coating), which were coated onto spherical particles as simulated nuclear fuel particles by fluidized-bed chemical vapour deposition (FBCVD). The mechanical properties of the SiC coatings were studied using micro- and nano-indentation. The microstructure was characterised using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM was also used to elucidate the deformation behaviour under the indentation. The FBCVD SiC coatings studied exhibited a higher hardness than conventional CVD SiC coatings, and SiC coating gave the highest hardness among the three coatings. TEM confirmed that the presence of pores affect the Young's modulus of SiC coatings. The high hardness was attributed to the high density of dislocations and their interactions. The initiation and propagation of micro cracks under the confined shear stress was found to be responsible for the mechanism of plastic deformation. Based on this hardness-related plastic deformation mechanism, the variation of hardness in the three types of SiC coating was due to different grain morphologies.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.jeurceramsoc.2011.12.014</doi><tpages>12</tpages></addata></record> |
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| ispartof | Journal of the European Ceramic Society, 2012-07, Vol.32 (8), p.1775-1786 |
| issn | 0955-2219 1873-619X |
| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Coatings FBCVD SiC coating Hardness Indentation Mechanical properties Microstructure Nanostructure Plastic deformation Silicon carbide Sub-micrometres polycrystalline TEM Transmission electron microscopy Young's modulus |
| title | A study of the microstructure and mechanical properties of SiC coatings on spherical particles |
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