CAJ | 학술논문

对直径为4 mm的Sn?0.65%Cd合金在行波磁场中进行定向凝固，结果发现其界面形貌是丰富多样的。在向上的行波磁场上，随着磁场强度的增大(B≤10.3 mT)，平界面和胞状界面交替转变。当加载向下的弱强度的行波磁场(B=3.2 mT)时，界面形貌由浅胞状向深胞状转变。当磁场强度进一步增大时，界面两侧呈现微弱的不一致，但是在强的磁场下界面形貌大致趋向于平界面(B≤10.3 mT)。这种界面的不稳定性可能归因于行波磁场驱动的流动。另外，在向上的行波磁场中界面形状几乎是水平的，但是在向下的行波磁场中界面形状是倾斜的。
대직경위4 mm적Sn?0.65%Cd합금재행파자장중진행정향응고，결과발현기계면형모시봉부다양적。재향상적행파자장상，수착자장강도적증대(B≤10.3 mT)，평계면화포상계면교체전변。당가재향하적약강도적행파자장(B=3.2 mT)시，계면형모유천포상향심포상전변。당자장강도진일보증대시，계면량측정현미약적불일치，단시재강적자장하계면형모대치추향우평계면(B≤10.3 mT)。저충계면적불은정성가능귀인우행파자장구동적류동。령외，재향상적행파자장중계면형상궤호시수평적，단시재향하적행파자장중계면형상시경사적。
The diversity of interface morphologies is observed for directionally solidified Sn?0.65%Cd alloy under a travelling magnetic field (TMF) in the 4 mm-diameter sample. Under an upward TMF, planar and cellular interface morphologies transform alternately with increasing magnetic flux density (B≤10.3 mT). The interface morphology transforms from shallow cellular to deep cellular morphology under a weak downward TMF (B=3.2 mT). When the magnetic flux density increases further, both sides of the interface morphology appear to be slightly inconsistent, but they roughly tend to be planar under a strong downward TMF (B≤10.3 mT). The interface instability may be attributed to the flow driven by the TMF. Moreover, the shape of interface appears to be almost flat under an upward TMF, but deflective under a downward TMF.