INDENTATION TESTING OF MoSi sub(2) BASED COMPOSITES

The paper deals with the study of some of the basic mechanical properties of novel composite systems based on molybdenum disilicide (MoSi sub(2)) with an addition of zirconia (ZrO sub(2)) or hafnia (HfO sub(2)) nanoparticles and their comparison to a monolithic MoSi sub(2) prepared by the same metho...

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Bibliographic Details
Published in:Powder Metallurgy Progress 2013-01, Vol.13 (1), p.29-33
Main Authors: Ballokova, B, Hvizdos, P, Besterci, M
Format: Article
Language:English
Subjects:
Hafnium oxide
Hardness
Indentation
Intermetallics
Modulus of elasticity
Molybdenum disilicides
Nanoparticles
Zirconium dioxide
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Summary:The paper deals with the study of some of the basic mechanical properties of novel composite systems based on molybdenum disilicide (MoSi sub(2)) with an addition of zirconia (ZrO sub(2)) or hafnia (HfO sub(2)) nanoparticles and their comparison to a monolithic MoSi sub(2) prepared by the same method. The measurements were carried out using the instrumented indentation technique where values of hardness and modulus of elasticity were simultaneously obtained for various indentation depths up to 600 nm in order to identify the possible load size effect or influence of the surface layers affected by machining. No such effects, which would significantly alter the results, have been observed. The results for all experimental materials were compared and related to their composition.
ISSN:1335-8987