Modeling of complex melting and solidification behavior in laser-irradiated materials (a description and users guide to the LASER8 computer program)

Technical Report · Fri Nov 01 04:00:00 EST 1985

DOI:https://doi.org/10.2172/6265998· OSTI ID:6265998

Geist, G A; Wood, R F

The conceptual foundation of a computational model and a computer program based on it have been developed for treating various aspects of the complex melting and solidification behavior observed in pulsed laser-irradiated materials. A particularly important feature of the modeling is the capability of allowing melting and solidification to occur at temperatures other than the thermodynamic phase change temperatures. As a result, interfacial undercooling and overheating can be introduced and various types of nucleation events can be simulated. Calculations on silicon with the model have shown a wide variety of behavior, including the formation and propagation of multiple phase fronts. Although originally developed as a tool for studying certain problems arising in the field of laser annealing of semiconductors, the program should be useful in treating many types of systems in which phase changes and nucleation phenomena play important roles. This report describes the underlying physical and mathematical ideas and the basic relations used in LASER8. It also provides enough specific and detailed information on the program to serve as a guide for its use; a listing of one version of the program is given.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6265998
• Report Number(s): ORNL-6242; ON: DE86004661
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ANNEALING
COMPUTER CODES
ENERGY TRANSFER
HEAT TRANSFER
HEAT TREATMENTS
HEATING
L CODES
LASER-RADIATION HEATING
MATERIALS
MELTING
NUMERICAL SOLUTION
PHASE TRANSFORMATIONS
PLASMA HEATING
SEMICONDUCTOR MATERIALS
SOLIDIFICATION