Characteristics of molybdenum copper

       Molybdenum Copper:



Molybdenum-copper alloy is a material used instead of copper and tungsten copper. Select high-quality molybdenum powder and oxygen-free copper powder, using isostatic pressing (high temperature sintering-copper infiltration), fine structure, good arc breaking performance, good electrical conductivity, good thermal conductivity, and low thermal expansion.



The use of molybdenum copper:



This standard is applicable to the manufacture of military high-power microelectronic devices as heat sink sealing materials and aluminum oxide ceramic sealing and molybdenum copper alloy rods for structural materials. It is also applicable to the manufacture of high thermal conductivity expansion seals for civilian high-power microelectronic devices. Molybdenum copper alloy rod for heat sink.



The characteristics of molybdenum copper:



Molybdenum-copper alloy summarizes the benefits of copper and molybdenum, high strength, high specific gravity, high temperature resistance, arc ablation resistance, good conductive electric heating function, and good processing function. Select high-quality molybdenum powder and oxygen-free copper powder, and use isostatic pressing (high temperature sintering-copper infiltration) to ensure product purity and precise proportioning, fine structure, and excellent function. Good arc breaking function, good electrical conductivity, and good thermal conductivity , Thermal expansion is small.



Molybdenum copper manufacturing method:



Liquid phase sintering method: Tungsten-copper or molybdenum-copper mixed powder is constrained and shaped, and then sintered in liquid phase at 1300-1500°. The material prepared by this method has poor uniformity and many closed spaces. The density is generally less than 98%. However, ultrafine and nanometer powders are prepared by the activation sintering method with a small amount of nickel, the mechanical alloying method or the oxide supply reduction method. It can advance the sintering activity, and then advance the density of tungsten-copper, molybdenum-copper alloy. However, nickel activation sintering will significantly reduce the electrical and thermal conductivity of the material, and the introduction of impurities in mechanical alloying will also reduce the conduction function of the material. The oxide co-reduction method to prepare powders requires cumbersome process and low output power, making it difficult to mass produce.



Tungsten and molybdenum framework infiltration method: First, tungsten powder or molybdenum powder is constrained to form, and sintered to form a tungsten and molybdenum framework with a certain porosity, and then copper is infiltrated. This method is applicable to tungsten copper, molybdenum copper products with low copper content. Compared with molybdenum copper, tungsten copper has the advantages of small quality, easy processing, linear expansion coefficient, thermal conductivity and some main mechanical functions and tungsten copper. Although the heat-resistant function is not as good as tungsten copper, it is better than some current heat-resistant materials, so the application prospect is better. Because the moisture of molybdenum-copper is worse than that of tungsten-copper, especially when preparing molybdenum-copper with low copper content, the density of the material after infiltration is lower, resulting in that the airtightness, electrical conductivity, and thermal conductivity of the material cannot meet the requirements. Use is restricted.