The grain size differs obviously with the time of ball milling and it reaches the smallest value when been ball milled for 15~20 hours. The grain size also grows when annealed at certain temperature.
结果表明在行星球磨方法下，球磨15到20小时材料晶粒达到最小，在一定温度下退火之后材料晶粒长大。
The grain size differs obviously with the time of ball milling and it reaches the smallest value when been ball milled for 15~20 hours. The grain size also grows when annealed at certain temperature.
结果表明在行星球磨方法下，球磨15到20小时材料晶粒达到最小，在一定温度下退火之后材料晶粒长大。
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