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Thermal Reliability of Advanced Metal Diamond Composites
Keywords: Diamond composites, thermal reliability, thermal management
Temperature Cycle Testing (TCT), or simply temperature cycling, determines the ability of parts to resist extremely low and extremely high temperatures, as well as their ability to withstand cyclical exposures to these temperature extremes. Thermal cycling tests on metal (Ag, Al, Cu)-diamond composites were performed in a two chamber cycling oven between -55C and +150C for 100, 300 and 1000 thermal cycles with 10 minutes storage time in each chamber. Thermal properties such as thermal diffusivity were measured before and after the thermal cycling to observe any changes in thermal properties of the composites due to any possible interfacial degradation. The thermal properties of the composites did not decrease and the interfaces did not degrade after the thermal cycling tests in case of silver-diamond composites. Al-diamond composites exhibit slightly lower values in thermal diffusivity after thermal cycling. It is the aim of this article to investigate the effect of number of thermal cycles on the thermal diffusivity of the diamond composites.
Ravi Bollina, Product Manager
Plansee SE
Reutte, Tirol 6600,
Austria


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