TY - JOUR
T1 - Correlation between the elastic shear instability mechanism and empirical criteria for irradiation-induced amorphization
AU - Koike, J.
AU - Okamoto, P. R.
AU - Rehn, L. E.
AU - Meshii, M.
N1 - Funding Information:
The work was supported by U.S. DOE W-31-109-ENG-38 and NSF DMR-8802487.
PY - 1991/7/1
Y1 - 1991/7/1
N2 - In an attempt to correlate the shear instability mechanism with empirical criteria for irradiation-induced amorphization, shear moduli of an A3B-type fcc crystal were calculated as a function of the chemical long range order parameter S using a Morse potential. The shear moduli were found to decrease with decreasing S. When the depth and the curvature of the A-B potential were changed while keeping the A-A and B-B potentials constant, the magnitude of the decrease in shear moduli is greater for deeper and narrower A-B potentials. The present results indicate that a shear instability should occur more readily in compounds with larger ordering energy and larger elastic moduli. These results agree with the reported empirical criteria for irradiation-induced amorphization, therefore providing further support for the shear instability mechanism for solid-state amorphization.
AB - In an attempt to correlate the shear instability mechanism with empirical criteria for irradiation-induced amorphization, shear moduli of an A3B-type fcc crystal were calculated as a function of the chemical long range order parameter S using a Morse potential. The shear moduli were found to decrease with decreasing S. When the depth and the curvature of the A-B potential were changed while keeping the A-A and B-B potentials constant, the magnitude of the decrease in shear moduli is greater for deeper and narrower A-B potentials. The present results indicate that a shear instability should occur more readily in compounds with larger ordering energy and larger elastic moduli. These results agree with the reported empirical criteria for irradiation-induced amorphization, therefore providing further support for the shear instability mechanism for solid-state amorphization.
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U2 - 10.1016/0168-583X(91)95262-C
DO - 10.1016/0168-583X(91)95262-C
M3 - Article
AN - SCOPUS:30244501529
SN - 0168-583X
VL - 59-60
SP - 471
EP - 474
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - PART 1
ER -