当晶粒尺寸减少时，晶粒边界或界面的体积分数有很大的增加。

As the grain size decreases, there is a significant increase in the volume fraction of grain boundaries or interfaces.

youdao

当晶粒尺寸减少时，晶粒边界或界面的体积分数有很大的增加。

As the grain size decreases, there is a significant increase in the volume fraction of grain boundaries or interfaces.

youdao