4.3. Brazing of copper-matrix composites
For Cu-matrix composites, Cu matrix is able to withstand higher temperature than that of Al matrix.
Thus, conventional Ag-Cu or Ag-Cu-Ti brazing filler can be used. However, because of the hard diamond particle, the surface of diamond/Cu composites is rough, and plating and brazing processes are more complex than those of smooth surface.
5. Future prospects and recommendations
Advanced metal matrix composites are still far from wide use due to the limit of thermo-physical property, manufacturing process, brazing technique and cost. The advantage of carbon/metal and diamond/metal composites has not been taken into full play because of the high interfacial resistance. Fundamental research on the improvement of wettability, controlling of interfacial structure and thermal conductance mechanism is of vital importance. Novel composites with co-continuous structure of hybrid reinforcement need to be emphasized. Near-net forming technique is also a key consideration. Continue improvements in packaging design and process, as well as new packaging solutions, are required.
4.3. Brazing of copper-matrix compositesFor Cu-matrix composites, Cu matrix is able to withstand higher temperature than that of Al matrix.Thus, conventional Ag-Cu or Ag-Cu-Ti brazing filler can be used. However, because of the hard diamond particle, the surface of diamond/Cu composites is rough, and plating and brazing processes are more complex than those of smooth surface.5. Future prospects and recommendationsAdvanced metal matrix composites are still far from wide use due to the limit of thermo-physical property, manufacturing process, brazing technique and cost. The advantage of carbon/metal and diamond/metal composites has not been taken into full play because of the high interfacial resistance. Fundamental research on the improvement of wettability, controlling of interfacial structure and thermal conductance mechanism is of vital importance. Novel composites with co-continuous structure of hybrid reinforcement need to be emphasized. Near-net forming technique is also a key consideration. Continue improvements in packaging design and process, as well as new packaging solutions, are required.
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