고전도성 필러 혼합을 통한 철도차량용 발열 복합소재의 열전도율 및 발열 균일도 개선 연구

초록

Railway lightweighting has renewed interest in composites with integrated heating. However, discontinuous heater layouts often create large in-panel temperature gradients. These gradients generate thermal stresses and can trigger interlaminar delamination. To address this, we mixed an electrically insulating ceramic filler into a phenolic matrix and evaluated its effects across resin, prepreg, and laminate levels. Experimental results showed that boron nitride (BN) accelerated the heating rate and markedly increased in-plane thermal conduction. Infrared thermography statistics further confirmed improved final-state heating uniformity and reduced temperature disparities. Thus, BN emerged as the preferred filler, with 5 wt% identified as the optimal loading for phenolic systems. This provides a practical route to simultaneously improve in-plane thermal conductivity and heating uniformity in railway interior laminates.

키워드