采用液氮球磨技术制备出纳米晶钛粉.运用SEM、XRD和TEM研究了液氮球磨过程中钛粉的形貌和组织的演变.结果表明:钛粉颗粒在液氮球磨过程中以脆性开裂的方式细化,经8h液氮球磨后钛粉颗粒从球磨前的45 μm减小到5μm左右,颗粒表面出现大量裂纹;采用液氮球磨方法制备纳米晶Ti粉仅需8h.
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