| 摘要 |
<p>1. A process for the production of a composite material made of copper and at least one of the metals molybdenum and tungsten, in particular as a substrate material for power semiconductors, in which the materials, which are present in powder form, are mixed, compressed to form shaped bodies, and sintered, and the sintered bodies are then subjected to mechanical working comprising the following process steps : a) mixing of copper powder with molybdenum and/or tungsten powder with an average particle size of less than 100 mu m, b) compression of the powder mixture, c) sintering of the powder mixture at a temperature above the melting point of copper, d) hot working of the sintered body at a temperature below 1000 degrees C by at least 50% in one step, e) cold working of the sintered body for a further cross-sectional reduction to the final value.</p> |
