The role of percolation threshold for the control of the hardness and thermal stability of super- and ultrahard nanocomposites

被引：127

作者：

Niederhofer, A

Bolom, T

Nesladek, P

Moto, K

Eggs, C

Patil, DS

Veprek, S

机构：

[1] Tech Univ Munich, Inst Chem Inorgan Mat, D-85747 Munich, Germany

[2] Bhabha Atom Res Ctr, Laser Plasma Technol Div, Bombay 400085, Maharashtra, India

来源：

SURFACE & COATINGS TECHNOLOGY | 2001年 / 146卷

关键词：

percolation thresholds; hardness; nanocomposite;

D O I：

10.1016/S0257-8972(01)01469-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：183 / 188

页数：6

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