The cast aluminum blocks were put together with the PTFE powder, which were mechanical milled by using a high-energy ball mill, then the remainder PTFE on the surfaces of the specimens was removed.

• 摘要将铸态块状纯铝连同聚四氟乙烯(PTFE)粉末放入球磨罐中进行机械球磨，除去残留于试样的聚四氟乙烯(PTFE)。