Byoungyong Im, Yubin Kang, Chan Gi Lee, Dae-Guen Kim, Hangoo Kim, Seongwoo Kim, Kwang Hoon Park, Tae Yang Kwak
August 22, 2019
Al alloys with improved thermal conductivity and similar castability compared to the most commonly used Al–Si alloying system (ALDC12) were developed. Starting with the ALDC3 composition, we modified the alloying elements to investigate the effect on thermal conductivity and fluidity. The modified alloys had slightly higher thermal conductivity of ∼110–116 W m −1 K −1 compared to ALDC12 (92 W m −1 K −1 ). The largest improvement in the thermal conductivity compared to ALDC12 was 26 %. Moreover, the developed alloys showed a relative fluidity of ∼80–88% (depending on the composition) compared to ALDC12. Simulations confirmed that the heat generated from the internal parts of an electronic device could be effectively absorbed and discharged to the developed alloys as a heat sink.