摘要
在对晶体生长平界面引入一个振幅微小的正弦平面波干扰,并考虑在液相中存在对流的条件下,获得了δ(t)/δ(t)的表达式,将上述复杂的表达式简化为一个三次方程,并通过对其根的研究,确定了二元稀溶液凝固平界面的不稳定干扰频率区间及危险频率.
By introducing a sinusoidal cylindric rippte of infinitesimal amp- litude into planar interfce when there is convection in the liquid,an expression q(ω)=δ(t)/δ(t) is obtained for determining the stability of planar interface, The unstable perturbation frequency interval and dangerous frequency of planar interface during solidification of a dilute binary alloy under the condition of a sinusoidal cylinderic perturbation have been investigated,In comparison with sinusoidal planar perturbation,the results obtained are more conformable with actual situation.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
1990年第1期29-38,共10页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金
关键词
晶体生长
稳定性
二元稀溶液
crystal growth
stability
perturbation/dangerous frequency
