Molecular dynamics study of solid melting and vaporization by laser irradiation
Molecular dynamics study of solid melting and vaporization by laser irradiation
复制标题
激光照射固体熔化和汽化的分子动力学研究
DOI：
10.1016/s0017-9310(05)80137-1
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发表时间：
1993
影响因子：
5.2
通讯作者：
Masatugu Kuroki
中科院分区：
文献类型：
--
作者：
S. Kotake;Masatugu Kuroki
采用分子动力学方法对固体材料在激光照射下熔化和汽化相变的分子过程进行了数值研究。通过吸收激光光能，固体原子或分子在原子间或分子间的势能被激发，从而改变它们之间的相互作用力。用分子动力学方法求解得到的原子或分子运动的哈密顿方程，以了解相变过程的分子行为。激发强度，即激光辐照能量，对汽化和熔化相变的影响最为显著。吸收的激光能量转化为蒸发粒子和晶格粒子的动能。能量传递过程受辐照周期和激发寿命的控制。
The molecular processes of the phase change of melting and vaporization of solid materials by laser beam irradiation were studied numerically by using the molecular dynamics method. By absorbing the laser light energy, the solid atoms or molecules are excited in the interatomic or intermolecular potential energy to change their interacting forces. The resulting Hamiltonian equations of atomic or molecular motions are solved with the molecular dynamics method to understand the molecular behavior of the phase changing process. The excitation strength, that is, the laser energy of irradiation, has the most predominant effect on the phase change of vaporization and melting. The laser energy absorbed is converted to the kinetic energy of the evaporating particles and that of the lattice particles. This process of energy transfer is controlled by the irradiation period as well as the excitation life.