Exploring the freezing process and its potential mechanism of the droplets impacting on a solid surface is desperately desired,owing to its anti-icing applications in aircraft,cable,radar,etc.On the controllable low temperature test equipment,the freezing dynamic behaviors of droplets impacting on three cold plates,made of copper,aluminum and silicon,are recorded by a high-speed camera in this paper,and characterized by the droplet spreading diameter,oscillation and freezing time.Here,the freezing behavior ...