Title: An investigation of combined size, rate and thermal effects on the material properties of single crystal diamond

Authors: Luming Shen, Zhen Chen

Addresses: Department of Civil Engineering, Monash University, Clayton Campus, Victoria 3800, Australia. ' Department of Civil and Environmental Engineering, University of Missouri-Columbia, Columbia, MO 65211-2200, USA

Abstract: The ability to predict the properties of material specimens with different sizes under various loading rates and temperatures is essential to evaluating the integrity and durability of NEMS/MEMS devices under extreme loading conditions. To better understand the rate, thermal and crystal orientation effects on size-dependent material responses, Molecular Dynamics (MD) simulations are performed with the use of Single Crystal Diamond (SCD) of various sizes under uniaxial tensile loading. In the MD simulations, the responses of SCD blocks of different sizes under <100> and <110> tensions at different loading rates and temperatures are studied. By combining the available experimental and simulation data, a hyper-surface is formulated to predict the combined size, rate and thermal effects on the strength of pristine diamond.

Keywords: single crystal diamond; size effect; rate effect; temperature effect; molecular dynamics; strength; NEMS devices; MEMS devices; uniaxial tensile loading; thermal orientation; crystal orientation.

DOI: 10.1504/IJMPT.2009.022407

International Journal of Materials and Product Technology, 2009 Vol.34 No.1/2, pp.111 - 130

Published online: 04 Jan 2009 *

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