| 摘要 |
A vacuum switch contact material consists essentially of a mixture of Cu and CrxOy (x=1 to 2, y=0 to 3) wherein CrxOy is in a particulate state, the center part of the particles consists of Cr2O3 (x=2, y=3), and the peripheral part of the particles consists of Cr (x=1, y=0). The CrxOy particles having Cr2O3 central part and Cr periphery can be formed by reducing the surface of Cr2O3 particles. Cu may be infiltrated into the open pores of CrxOy particles after a green compact of Cr2O3 is formed. Alternatively, a mixture of Cr2Oy particles and Cu particles may be formed into a green compact, which may then be sintered. Still alternatively, a mixture of Cr2Oy particles and Cu particles may be hot-pressed.
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