碎断 meaning in English

fragmentation

When the undercooling goes beyond the coupled zone , it is found that the ( pb ) dendrites in the acoustically levitated drops can also appear in the top of the drops and the gravitational macrosegregation is effectively suppressed , which may be caused by the ultrasound and complicated fluid flow inside the drops
发现在小过冷范围内，由于超声波的搅拌作用层片共晶组织发生碎断现象；在大过冷情况下，超声波可以有效地抑制宏观偏析的发生。