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本文对内氧化法制取的Cu-Al_2O_3复合材料作了电镜观察及电子衍射,确认用内氧化法可以得到Cu-Al_2O_3,它的大小为10~(-3)μm左右,分布比较均匀,又测定了硬度、强度、电阻率等力学、物理性能。并将Cu-Al_2O_3复合材料作成触点装入过流保护器中,通入7A电流,闭合6～7秒,开断1.5分钟,开闭2000次后开关仍正常工作,无熔焊现象,从而为触头材料节银开辟新的途径。
In this paper, the Cu-Al 2 O 3 composite prepared by the internal oxidation method was observed by electron microscopy and electron diffraction. It was confirmed that Cu-Al 2 O 3 was obtained by the internal oxidation method and its size was about 10 ~ (-3) μm. The hardness, strength, resistivity and other mechanical, physical properties. And the Cu-Al_2O_3 composite material as a contact into the over-current protection device, the access 7A current, closed 6 to 7 seconds, 1.5 minutes off, open and close 2000 times the switch is still working properly, no welding phenomenon, which Silver for the contact material section opens up new avenues.