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Indentation fracture toughness and surface flaw analysis of sintered alumina/SiC nanocomposites

Abstract:
The fracture toughness (K1c) of pressureless-sintered monolithic α-alumina and its composites with 5, 10 and 15 vol% SiC nano-sized particles was investigated using Vickers indentation and a new Hertzian (ball) indentation technique. Both methods showed that the fracture toughness of the composites is better than that of alumina, although the results from the Vickers indentations were complicated by a change in crack geometry from median/radial (alumina) to Palmqvist (composites) An analysis of the number and size of surface flaws using the Hertzian test indicates that, for the same polishing treatment, the composites have a better surface finish. © 1996 Elsevier Science Limited.
Publication status:
Published

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Publisher copy:
10.1016/0955-2219(96)00038-6

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Role:
Author


Journal:
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY More from this journal
Volume:
16
Issue:
10
Pages:
1107-1114
Publication date:
1996-01-01
DOI:
ISSN:
0955-2219


Pubs id:
pubs:20066
UUID:
uuid:da37f882-cbb4-4363-9ea5-48a56a1061d7
Local pid:
pubs:20066
Source identifiers:
20066
Deposit date:
2012-12-19

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