Thermal diffusion coating of diamonds for improved and reliable thermal properties of metal diamond composites

M. Kitzmantel, E. Neubauer, W. Kapaun, W. Treberspurg, I. Smid, C. Eisenmenger-Sittner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish (US)
Title of host publicationProceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
PublisherEuropean Powder Metallurgy Association (EPMA)
ISBN (Print)9781899072194
StatePublished - Jan 1 2010
EventWorld Powder Metallurgy Congress and Exhibition, World PM 2010 - Florence, Italy
Duration: Oct 10 2010Oct 14 2010

Publication series

NameProceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
Volume5

Other

OtherWorld Powder Metallurgy Congress and Exhibition, World PM 2010
CountryItaly
CityFlorence
Period10/10/1010/14/10

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Ceramics and Composites
  • Materials Chemistry
  • Metals and Alloys
  • Condensed Matter Physics

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  • Cite this

    Kitzmantel, M., Neubauer, E., Kapaun, W., Treberspurg, W., Smid, I., & Eisenmenger-Sittner, C. (2010). Thermal diffusion coating of diamonds for improved and reliable thermal properties of metal diamond composites. In Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010 (Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010; Vol. 5). European Powder Metallurgy Association (EPMA).