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Strengthening alumina ceramic matrix nanocomposites using spark plasma sintering
Pramoda Kumar Nayak
Published in Elsevier Inc.
2018
Pages: 231 - 247
Abstract
The strengthening of Al 2 O 3 -Cr 2 O 3 /Cr 3 C 2 nanocomposites has been investigated using nano-indentation technique. These composites are fabricated by metal-organic chemical vapor deposition using Cr(CO) 6 as a precursor and Al 2 O 3 as the matrix followed by spark plasma sintering. The nanocomposites have a higher elastic modulus and are able to endure higher plastic deformation than monolithic alumina. The microstructures of the dislocation, transgranular, and stepwise fracture surfaces are observed. Moreover, Al 2 O 3 -Cr 2 O 3 /Cr 3 C 2 nanocomposites have high hardness, fracture toughness, and facture strength due to strengthening by second phase Cr 3 C 2 particles and the solid solution of Al 2 O 3 -Cr 2 O 3 . © 2018 Elsevier Ltd. All rights reserved.
About the journal
JournalData powered by TypesetAdvances in Ceramic Matrix Composites: Second Edition
PublisherData powered by TypesetElsevier Inc.
Open AccessNo
Concepts (23)
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    Aluminum oxide
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    Fracture toughness
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    Indentation
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    Metallic matrix composites
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    Metallorganic chemical vapor deposition
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    Nanocomposites
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    Nanoindentation
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    Organic chemicals
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    Organometallics
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    Sintered alumina
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    Spark plasma sintering
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    STRENGTHENING (METAL)
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    Textures
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    Toughness
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    ALUMINA CERAMIC
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    Fracture surfaces
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    HIGH HARDNESS
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    METAL ORGANIC
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    MONOLITHIC ALUMINA
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    Nanoindentation techniques
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    Second phase
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    TRANSGRANULAR
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    Chromium compounds