Superheating systematics of crystalline solids
نویسندگان
چکیده
Systematics of superheating (u5T/Tm21) of crystalline solids as a function of heating rate (Q) are established as b5A(Q)(u11)u, where the normalized energy barrier for homogeneous nucleation is b516pgsl 3 /(3kTmDHm 2 ), T is temperature, Tm melting temperature, A a Q-dependent parameter, gsl interfacial energy, DHm heat of fusion, and k Boltzmann’s constant. For all elements and compounds investigated, b varies between 0.2 and 8.2. At 1 and 10 K/s, A560 and 31, u 50.05– 0.35 and 0.06–0.45, respectively. Significant superheating is achievable via ultrafast heating. We demonstrate that the degree of superheating achieved in shock-wave loading and intense laser irradiation as well as in molecular dynamics simulations (Q;10 K/s) agrees with the u – b – Q systematics. © 2003 American Institute of Physics. @DOI: 10.1063/1.1563046#
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