Departmental Papers (MSE)

Document Type

Journal Article

Date of this Version

12-14-2009

Abstract

We correlate the experimentally measured fracture toughness of 24 metals and ceramics to their quantum mechanically calculated brittleness parameter. The brittleness parameter is defined as the ratio of the elastic energy density needed to spontaneously break bonds in shear versus in tension, and is a primitive-cell property. Under 300 GPa hydrostatic pressure, the model predicts that diamond has smaller brittleness than molybdenum at zero pressure, and thus should deform plastically without cracking at room temperature.

Comments

Suggested Citation:
Ogata, S. and J. Li. (2009). "Toughness scale from first principles." Journal of Applied Physics. 106, 113534.

© 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
http://dx.doi.org/10.1063/1.3267158

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Date Posted: 23 November 2010

This document has been peer reviewed.