Journal
SURFACE & COATINGS TECHNOLOGY
Volume 146, Issue -, Pages 183-188Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0257-8972(01)01469-4
Keywords
percolation thresholds; hardness; nanocomposite
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It is shown that enhancement of the hardness in superhard nanocomposites is due to the percolative nature of phase segregation, which results in approximately I-ML coverage of the transition metal nanocrystals with the non-polar Si3N4. The formation of a nanostructure that is stable against coarsening up to relatively high temperatures is a consequence of the thermodynamically driven segregation of the immiscible phases. (C) 2001 Elsevier Science B.V. All rights reserved.
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