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Residual stress and subsurface damage in machined alumina and alumina/silicon carbide nanocomposite ceramics

Abstract:

We have used TEM and Hertzian indentation to study the interrelation between subsurface damage and residual stress introduced by grinding and diamond polishing surfaces of polycrystalline alumina and 5%SiC/alumina nanocomposites. In all cases a layer of high dislocation density was found near the surface. This varied in thickness from about 300 nm for alumina polished with 1 μm diamond grit to greater than 6 μm for a nanocomposite surface wheel-ground with 150 μm diamond grit. For a given fin...

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Publication status:
Published

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Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Role:
Author
Publisher:
Elsevier
Journal:
ACTA MATERIALIA More from this journal
Volume:
49
Issue:
3
Pages:
507-517
Publication date:
2001-02-08
DOI:
ISSN:
1359-6454
Language:
English
Keywords:
Pubs id:
pubs:24743
UUID:
uuid:06c19f32-ddb0-4caa-adb1-bc87ddec9311
Local pid:
pubs:24743
Source identifiers:
24743
Deposit date:
2012-12-19

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