Microhardness of the YbxY1−xInCu4 alloy system: the influence of electronic structure on hardness

We show that the Vickers microhardness, measured on flux grown single crystals of the YbxY1-xInCu4 alloy system, although sample dependent, exhibits clear concentration dependence; it increases with decreasing x. Such a dependence is not expected because the cubic lattice parameter increases with de...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2003-12, Vol.15 (50), p.8719-8723
Main Authors: Očko, M, Sarrao, J L, Stubičar, N, Aviani, I, Šimek, Ž, Stubičar, M
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
Tribology and hardness
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Summary:We show that the Vickers microhardness, measured on flux grown single crystals of the YbxY1-xInCu4 alloy system, although sample dependent, exhibits clear concentration dependence; it increases with decreasing x. Such a dependence is not expected because the cubic lattice parameter increases with decreasing x and one expects then a decrease of hardness with decreasing x. Also, such a concentration dependence is in accordance with neither the Mott-Nabarro theory nor other known experimental results. We ascribe the observed dependence to the change of the electronic structure of the YbxY1-xInCu4 alloy system with x.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/15/50/006