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Separating macrostresses from microstresses in Al2O3-15 vol%SiC particulate reinforced composites
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- Zou, Ji (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Zhong, Yuan (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Zhang, Jun-Zhan (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK),Xi'an University of Architecture & Technology, China
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- Ekelund, Magnus (author)
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- (creator_code:org_t)
- Elsevier BV, 2015
- 2015
- English.
- In: Scripta Materialia. - : Elsevier BV. - 1359-6462 .- 1872-8456. ; 109, s. 84-88
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Macrostresses and microstresses coexist in ceramics, but are difficult to distinguish. In this work, these two types of residual stresses were separated by comparing the stress levels on the mechanically and argon beam polished surfaces of Al2O3-15 vol%SiC particulate reinforced composites. Stresses were measured using the shift of a Raman peak of beta-sic, the shift of a luminescence line of alpha-Al2O3 and a self-consistent approach. The critical grain size of SiC, over which will result in the crack formation in Al2O3 matrix, was calculated to be 13.5-26.4 mu m. New microcracldng did not form in Al2O3 grains during progressive mechanical polishing.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Keyword
- Particulate reinforced composites
- Residual stresses
- Spark plasma sintering
- Raman spectroscopy
- Argon ion beam polishing
Publication and Content Type
- ref (subject category)
- art (subject category)
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