TY - GEN
T1 - Thermal diffusion coating of diamonds for improved and reliable thermal properties of metal diamond composites
AU - Kitzmantel, M.
AU - Neubauer, E.
AU - Kapaun, W.
AU - Treberspurg, W.
AU - Smid, I.
AU - Eisenmenger-Sittner, C.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - Metal Diamond Composites exhibit promising properties for thermal management applications. A tailored design of the interface between the material partners is essential to exploit the potential of the reinforcement. In this study a cost efficient and easy to apply coating technique based on thermal diffusion was investigated and thin nanometer to micrometer coatings of various metals were successfully applied onto diamond powders. Besides the study of the diffusion process itself, the resulting layer thicknesses and interlayer compositions, the coated diamonds were introduced in a metal matrix by hot pressing and the thermal properties of the composite were measured. Thermal conductivities above 600W/mK and a coefficient of thermal expansion of 8-10ppm/K were achieved in such composites. In addition, thermo-mechanical stability was tested by thermal cycling under harsh conditions. Various sample geometries were produced to show the benefits of PM processing which enables combining excellent thermal properties with good surface finish and complex shaping.
AB - Metal Diamond Composites exhibit promising properties for thermal management applications. A tailored design of the interface between the material partners is essential to exploit the potential of the reinforcement. In this study a cost efficient and easy to apply coating technique based on thermal diffusion was investigated and thin nanometer to micrometer coatings of various metals were successfully applied onto diamond powders. Besides the study of the diffusion process itself, the resulting layer thicknesses and interlayer compositions, the coated diamonds were introduced in a metal matrix by hot pressing and the thermal properties of the composite were measured. Thermal conductivities above 600W/mK and a coefficient of thermal expansion of 8-10ppm/K were achieved in such composites. In addition, thermo-mechanical stability was tested by thermal cycling under harsh conditions. Various sample geometries were produced to show the benefits of PM processing which enables combining excellent thermal properties with good surface finish and complex shaping.
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M3 - Conference contribution
AN - SCOPUS:84902180074
SN - 9781899072194
T3 - Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
BT - Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
PB - European Powder Metallurgy Association (EPMA)
T2 - World Powder Metallurgy Congress and Exhibition, World PM 2010
Y2 - 10 October 2010 through 14 October 2010
ER -