Electron microscopy of crack/particle interactions in Al2O3/SiC nanocomposites
Crack/particle interactions in alumina/silicon carbide nanocomposites have been investigated by scanning electron microscopy and transmission electron microscopy, with cracks induced by Vickers microindentation. Intergranular cracks are frequently deflected into grains by SiC particles on grain boun...
| मुख्य लेखकों: | , , |
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| स्वरूप: | Conference item |
| प्रकाशित: |
1997
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| _version_ | 1826297413800820736 |
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| author | Jiao, S Jenkins, M Davidge, R |
| author_facet | Jiao, S Jenkins, M Davidge, R |
| author_sort | Jiao, S |
| collection | OXFORD |
| description | Crack/particle interactions in alumina/silicon carbide nanocomposites have been investigated by scanning electron microscopy and transmission electron microscopy, with cracks induced by Vickers microindentation. Intergranular cracks are frequently deflected into grains by SiC particles on grain boundaries inclined to the average direction of crack propagation, This mechanism is proposed to explain the change in the fracture mode from intergranular fracture for monolithic alumina to predominantly transgranular fracture for the nanocomposites. Neither stress-induced microcracking around SiC particles nor significant crack deflection by intragranular particles was found to occur in the nanocomposites. It is argued that an addition of nanoparticles may not be a promising approach for increasing the toughness of alumina. |
| first_indexed | 2024-03-07T04:31:14Z |
| format | Conference item |
| id | oxford-uuid:ce63c661-df8f-4037-bf92-5ccb1c624d41 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:31:14Z |
| publishDate | 1997 |
| record_format | dspace |
| spelling | oxford-uuid:ce63c661-df8f-4037-bf92-5ccb1c624d412022-03-27T07:35:15ZElectron microscopy of crack/particle interactions in Al2O3/SiC nanocompositesConference itemhttp://purl.org/coar/resource_type/c_5794uuid:ce63c661-df8f-4037-bf92-5ccb1c624d41Symplectic Elements at Oxford1997Jiao, SJenkins, MDavidge, RCrack/particle interactions in alumina/silicon carbide nanocomposites have been investigated by scanning electron microscopy and transmission electron microscopy, with cracks induced by Vickers microindentation. Intergranular cracks are frequently deflected into grains by SiC particles on grain boundaries inclined to the average direction of crack propagation, This mechanism is proposed to explain the change in the fracture mode from intergranular fracture for monolithic alumina to predominantly transgranular fracture for the nanocomposites. Neither stress-induced microcracking around SiC particles nor significant crack deflection by intragranular particles was found to occur in the nanocomposites. It is argued that an addition of nanoparticles may not be a promising approach for increasing the toughness of alumina. |
| spellingShingle | Jiao, S Jenkins, M Davidge, R Electron microscopy of crack/particle interactions in Al2O3/SiC nanocomposites |
| title | Electron microscopy of crack/particle interactions in Al2O3/SiC nanocomposites |
| title_full | Electron microscopy of crack/particle interactions in Al2O3/SiC nanocomposites |
| title_fullStr | Electron microscopy of crack/particle interactions in Al2O3/SiC nanocomposites |
| title_full_unstemmed | Electron microscopy of crack/particle interactions in Al2O3/SiC nanocomposites |
| title_short | Electron microscopy of crack/particle interactions in Al2O3/SiC nanocomposites |
| title_sort | electron microscopy of crack particle interactions in al2o3 sic nanocomposites |
| work_keys_str_mv | AT jiaos electronmicroscopyofcrackparticleinteractionsinal2o3sicnanocomposites AT jenkinsm electronmicroscopyofcrackparticleinteractionsinal2o3sicnanocomposites AT davidger electronmicroscopyofcrackparticleinteractionsinal2o3sicnanocomposites |