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CMC Alloy Process - Rolling Cladding

cmc alloyCMC alloy process(copper molybdenum copper alloy) - rolling cladding as follow:

Rolling cladding is a method using a large amount of reduction, so that 2 or more layers of metal or alloy is deformed, relying on metal bond between atoms are attracted to each group element layers together closely preparaed of a composite material, the method is currently the most mature, the most widely used Cu/Mo/Cu composites technologies.

U.S. Amax companies and Climax SpecialtyMetals companies use hot composite technology, successfully produced a variety of sizes, local or full-coated CMC alloy (Cu/Mo/Cu) multilayer composite materials, and applied for a patent. And molybdenum-copper alloy, copper alloy powder metallurgy tungsten particles produced enhanced electronic packaging materials, the production of flat rolled composite multi-layer composite electronic packaging materials high thermal efficiency, low cost, and can produce large size packaging materials to achieve large-scale production.

U.S. Ploymetallurgical type material in the production of coated behalf of the industry's highest level, the company produces CMC alloy composites in the international arena in the first-class level. CMC alloy products part of their performance in Chart 1.

Chart. CMC Alloy Product Performance

CMC alloy
Layer Thickness Ratio
Plane Direction Thermal Expansion Coefficient/ (10-6/K) Thickness Direction Thermal Expansion Coefficient/(10-6/K) Plane Sirection Thermal Conductivity/(W /m·K) Thickness Direction Thermal Conductivity/(W /m·K)
1∶1∶1 9. 340 10. 0 13. 0 306 245
1∶2∶1 9. 550 8. 3 11. 0 267 208
1∶6∶1 9. 986 6. 5 8. 2 207 170

Japan A.L.M.T company will molybdenum copper alloy rolled into a strip, with its CMC alloy acts as an intermediate layer, the use of hot-rolled prepared a Cu/Mo/Cu planar composite electronic packaging materials. As molybdenum-copper alloy of copper was filled in the network between the molybdenum skeleton-like distribution, making the product in a planar direction and a thickness direction of the electrical and thermal conductivity than the same thickness ratio of Cu/Mo/Cu better.

Mo-Cu layer and the middle due to copper added, showed a more excellent processing performance. Plansee, Austria produced Cu/Mo-30Cu/Cu (1:4:1) 3 layered composite material has a density of 9. 5 g/cm3, the thermal conductivity of the planar direction ≥ 260W/m · K, the thermal expansion coefficient of 4.0 × 10-6 ~ 10.0 × 10-6/K, these properties are listed in table 1, even better than the layer thickness ratio of 1:2:1 Cu/Mo/Cu composite material is more excellent.

Rolling cladding technology and equipment is more mature, high yield, greatly reduce production costs, but also easy to implement large-scale industrial production, is a great potential for development of composite material technology. But rolling composite one-time investment, it is not conducive to small batch production.

If you have any interest in our CMC alloy(copper molybdenum copper alloy) or other molybdenum alloy products, please feel free to contact us by email:, or by telephone:86 592 512 9696.

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