Abstract
Nanoindentation has been used to investigate the elastoplastic behavior of Hg0.7Cd0.3Te prepared by molecular beam epitaxy. It was found that Hg0.7Cd0.3Te had a modulus of elasticity of ∼50GPa and hardness of ∼0.66GPa. The HgCdTe response to nanoindentation was found to be purely elastic for low loads and developed into ∼10% elastic and ∼90% plastic response for higher-load indentation exhibiting significant amounts of creep. The onset of plasticity has been observed to be marked by discontinuities or “pop-in” events in the indenter load-penetration curves at sheer stresses of ∼1.8GPa, and has been correlated with the homogeneous nucleation and propagation of dislocations.
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