Effect of Porosity on Thermal Performance of Mo-Cu Composite

Four kinds of Mo/Cu alloys with different porosity were fabricated by adding different organic compounds and combining solid-phase sintering,and their thermal conductivity(λ) and coefficient of thermal expansion(CTE) were measured.The results show that the porosity in Mo-Cu composite has a great effect on λ value of the composite.The λ value of the composite declines acutely when the porosity of Mo-Cu composite increases.In some extension,the CTE value increases with the porosity reducing.On the other hand,the CTE value becomes degressive when porosity beyond some extension.The effect mechanism of porosity on theoretical λ value of the composite were discussed.