MWCNT-coated alumina micro-platelets for nacre-like biomimetic composites
© 2019 The Authors A novel building block material for the generation of non-brittle ceramic composites consisting of micron-sized alumina platelets homogeneously coated with multi-wall carbon nanotubes (MWCNTs) bound to their surface is described. The MWCNT phase is grown in situ from immobilised m...
| Main Authors: | , , , |
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| Format: | Journal article |
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Elsevier
2019
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| _version_ | 1797053268893892608 |
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| author | Evers, K Porwal, H Todd, R Grobert, N |
| author_facet | Evers, K Porwal, H Todd, R Grobert, N |
| author_sort | Evers, K |
| collection | OXFORD |
| description | © 2019 The Authors A novel building block material for the generation of non-brittle ceramic composites consisting of micron-sized alumina platelets homogeneously coated with multi-wall carbon nanotubes (MWCNTs) bound to their surface is described. The MWCNT phase is grown in situ from immobilised metal catalyst particles using chemical vapour deposition techniques. In-depth Raman and scanning electron microscope studies revealed that this approach solves the typical issue of MWCNT-agglomeration in ceramic matrices and paves the way to excellent control over MWCNT purity and concentration within the resulting composite material. Moreover, we show that the preparation of the catalyst is the most important factor for the generation of uniformly distributed MWCNTs of high-quality on these platelets. With these MWCNT-coated alumina building blocks, we have manufactured nacre-like biomimetic composites using spark plasma sintering. The resulting composites are electrically conductive and three-point bending tests show a transition from brittle/catastrophic failure to graceful failure, holding great promise towards multifunctional, tough and strong lightweight ceramic composite manufacturing. |
| first_indexed | 2024-03-06T18:41:31Z |
| format | Journal article |
| id | oxford-uuid:0d04304b-10b3-4402-b1fd-d01077f0e265 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T18:41:31Z |
| publishDate | 2019 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:0d04304b-10b3-4402-b1fd-d01077f0e2652022-03-26T09:38:17ZMWCNT-coated alumina micro-platelets for nacre-like biomimetic compositesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0d04304b-10b3-4402-b1fd-d01077f0e265Symplectic Elements at OxfordElsevier2019Evers, KPorwal, HTodd, RGrobert, N© 2019 The Authors A novel building block material for the generation of non-brittle ceramic composites consisting of micron-sized alumina platelets homogeneously coated with multi-wall carbon nanotubes (MWCNTs) bound to their surface is described. The MWCNT phase is grown in situ from immobilised metal catalyst particles using chemical vapour deposition techniques. In-depth Raman and scanning electron microscope studies revealed that this approach solves the typical issue of MWCNT-agglomeration in ceramic matrices and paves the way to excellent control over MWCNT purity and concentration within the resulting composite material. Moreover, we show that the preparation of the catalyst is the most important factor for the generation of uniformly distributed MWCNTs of high-quality on these platelets. With these MWCNT-coated alumina building blocks, we have manufactured nacre-like biomimetic composites using spark plasma sintering. The resulting composites are electrically conductive and three-point bending tests show a transition from brittle/catastrophic failure to graceful failure, holding great promise towards multifunctional, tough and strong lightweight ceramic composite manufacturing. |
| spellingShingle | Evers, K Porwal, H Todd, R Grobert, N MWCNT-coated alumina micro-platelets for nacre-like biomimetic composites |
| title | MWCNT-coated alumina micro-platelets for nacre-like biomimetic composites |
| title_full | MWCNT-coated alumina micro-platelets for nacre-like biomimetic composites |
| title_fullStr | MWCNT-coated alumina micro-platelets for nacre-like biomimetic composites |
| title_full_unstemmed | MWCNT-coated alumina micro-platelets for nacre-like biomimetic composites |
| title_short | MWCNT-coated alumina micro-platelets for nacre-like biomimetic composites |
| title_sort | mwcnt coated alumina micro platelets for nacre like biomimetic composites |
| work_keys_str_mv | AT eversk mwcntcoatedaluminamicroplateletsfornacrelikebiomimeticcomposites AT porwalh mwcntcoatedaluminamicroplateletsfornacrelikebiomimeticcomposites AT toddr mwcntcoatedaluminamicroplateletsfornacrelikebiomimeticcomposites AT grobertn mwcntcoatedaluminamicroplateletsfornacrelikebiomimeticcomposites |