Structure, elastic properties and strength of amorphous and nanocomposite carbon

被引：23

作者：

Remediakis, Ioannis N. ^{[1
]}

Fyta, Maria G.

Mathioudakis, Christos

Kopidakis, Georgios

Kelires, Pantelis C.

机构：

[1] Univ Crete, Dept Mat Sci & Technol, Iraklion 71003, Greece

[2] Univ Crete, Dept Phys, Iraklion 71003, Greece

[3] Fdn Res & Technol Hellas, IESL, Iraklion 71003, Greece

来源：

关键词：

amorphous carbon; nanocomposite carbon; mechanical properties; fracture;

D O I：

10.1016/j.diamond.2007.08.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study theoretically the equilibrium structure, as well as the response under external load, of characteristic carbon-based materials. The materials considered include diamond, amorphous carbon (a-C), "amorphous diamond" and nanocomposite amorphous carbon (na-C). A universal bulk modulus versus density curve is obeyed by all structures we consider. We calculate the dependence of elastic constants on the density. The strength of a-C was found to increase in roughly a linear manner, with increasing concentration of four-fold atoms, with the maximum stress of the strongest a-C sample being about half that of diamond. The response of na-C to external load is essentially identical to the response of the embedding a-C matrix. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1835 / 1840

页数：6

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