SiC-Fibre Reinforced copper alloy as a heat sink material for fusion application
D. Muchilo, J. Hemptenmacher, H. Schurmann, P.W.M. Peters

Continuous SiC-fibre reinforced CuCr1Zr-alloy is attractive as a heat sink material for different applications. In the present work SiC/CuCr1Zr composite specimens with fibre volume fractions in the range of Vf=0.09 to Vf=0.38 are produced with the aid of copper alloy coated fibres produced by magnetron sputtering. To improve an expected low fibre/matrix bond strength also composite materials with an interfacial layer of 0.2μm Ti and 0.2μm (and 2μm) Cr between fibres and copper alloy are produced. A clear influence of the different interphases on the axial tensile strength was not found. Further the strengthening efficiency of the fibres appeared to be clearly smaller than in SiC-fibre reinforced titanium alloys. First measurements of the thermal conductivity of unreinforced and reinforced alloy show a decrease of the thermal conductivity due to the reinforcement. A calculation of the axial thermal conductivity with the rule of mixtures shows an acceptable agreement with experimental results.

For more informations please contact:

Dr. Piet Peters

Deutsches Zentrum für Luft- und Raumfahrt e.V.

piet.peters@dlr.de