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Abrasive wear of Al2O3–SiC and Al2O3–(SiC)–C composites with micrometer- and submicrometer-sized alumina matrix grains

Sedláček, Jaroslav ; Galusek, Dušan ; Švančárek, Peter ; Riedel, Ralf ; Atkinson, Alan ; Wang, Xin (2008):
Abrasive wear of Al2O3–SiC and Al2O3–(SiC)–C composites with micrometer- and submicrometer-sized alumina matrix grains.
In: Journal of the European Ceramic Society, 28 (15), pp. 2983-2993. SciVerse, ISSN 09552219,
[Article]

Abstract

The response of Al2O3, Al2O3–SiC–(C) and Al2O3–C nanocomposites to grinding was investigated in terms of changes of quality of ground surfaces and of the weight losses with time. The study used monolithic polycrystalline aluminas as references, and alumina-based composites with nanosized SiC and C inclusions and with alumina matrix grain size varying from submicrometer to approximately 4 μm. The studied materials can be roughly divided into two groups. Materials with submicrometer alumina matrix grains (Group 1) wear predominantly by plastic deformation and grooving. Coarse-grained materials (Group 2) wear by mixed wear mechanism involving crack initiation and interlinking accompanied by grain pull-out, plastic deformation and grooving. The wear rate of composites increases with increasing volume fraction of SiC. The Group 2 materials wear much faster then those with submicron microstructure. In all cases (with one exception) the wear resistance of composites was higher than that of pure aluminas of comparable grain sizes used as reference materials.

Item Type: Article
Erschienen: 2008
Creators: Sedláček, Jaroslav ; Galusek, Dušan ; Švančárek, Peter ; Riedel, Ralf ; Atkinson, Alan ; Wang, Xin
Title: Abrasive wear of Al2O3–SiC and Al2O3–(SiC)–C composites with micrometer- and submicrometer-sized alumina matrix grains
Language: English
Abstract:

The response of Al2O3, Al2O3–SiC–(C) and Al2O3–C nanocomposites to grinding was investigated in terms of changes of quality of ground surfaces and of the weight losses with time. The study used monolithic polycrystalline aluminas as references, and alumina-based composites with nanosized SiC and C inclusions and with alumina matrix grain size varying from submicrometer to approximately 4 μm. The studied materials can be roughly divided into two groups. Materials with submicrometer alumina matrix grains (Group 1) wear predominantly by plastic deformation and grooving. Coarse-grained materials (Group 2) wear by mixed wear mechanism involving crack initiation and interlinking accompanied by grain pull-out, plastic deformation and grooving. The wear rate of composites increases with increasing volume fraction of SiC. The Group 2 materials wear much faster then those with submicron microstructure. In all cases (with one exception) the wear resistance of composites was higher than that of pure aluminas of comparable grain sizes used as reference materials.

Journal or Publication Title: Journal of the European Ceramic Society
Journal volume: 28
Number: 15
Publisher: SciVerse
Uncontrolled Keywords: Al2O3–SiC, Al2O3–(C), Precursors—organic, Microstructure—final, Mechanical properties, Wear resistance
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 16 Apr 2012 08:47
Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2008.04.018
Identification Number: doi:10.1016/j.jeurceramsoc.2008.04.018
Funders: The financial support of this work by the NATO Science for Peace Programme, under the contract No. SfP-981770, the Slovak National Grant Agency VEGA, grant No. 2/6181/26 is gratefully acknowledged., D. Galusek wishes to acknowledge the financial support of the Alexander von Humboldt Foundation.
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