Brazing of carbon–carbon composites to Cu-clad molybdenum for thermal management applications

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 452; pp. 699 - 704
• Main Authors: Singh, M., Asthana, R., Shpargel, T.P.
• Format: Journal Article
• Language: English
• Published: Glenn Research Center Elsevier B.V 01-04-2007; Elsevier
• Subjects: Applied sciences; Brazing; Brazing. Soldering; Carbon–carbon composites; Composite Materials; Copper-clad molybdenum; Exact sciences and technology; Joining, thermal cutting: metallurgical aspects; Metals. Metallurgy; Microhardness; Microstructure; Copper-clad molybdenum; Brazing; Carbon–carbon composites; Microstructure; Microhardness; Carbon-carbon composites; Carbon carbon composite; Scanning electron microscopy; Dispersive spectrometry; Brazed joint; Molybdenum; Knoop hardness; Interface crack; Copper
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2006.11.031

Advanced carbon–carbon composites were joined to copper-clad molybdenum (Cu/Mo) using four active metal brazes containing Ti (Cu–ABA, Cusin-1 ABA, Ticuni, and Ticusil) for potential use in thermal management applications. The brazed joints were characterized using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and Knoop microhardness measurements across the joint region. Metallurgically sound C
C/Cu/Mo joints, devoid of interfacial cracks formed in all cases. The joint interfaces were preferentially enriched in Ti, with Cu–ABA joints exhibiting the largest interfacial Ti concentrations. The microhardness measurements revealed hardness gradients across the joint region, with a peak hardness of 300–350
KHN in Cusin-1 ABA and Ticusil joints and 200–250
KHN in Cu–ABA and Ticuni joints, respectively.