Determination of Thermal Conductivity and Numerical Analysis of Al-Cr-N-O Composites Layer Formed by Hydro-thermal Process

수열합성된 Al-Cr-N-O계 도포층의 열전도 측정과 수학적 해석

Composites layer of Al-Cr-Ni-O system was prepared on a steel plate by hydro-thermal process at $700^{\circ}C$ for 12 hours, which phase identification and thermal conductivity were determined. The composites layer consisted of aluminum nitride, alumina, chromium carbide and aluminium, which density was $3.7kg/m^3$. The thermal conductivity of the coating layer determined by thermal data acquisition system was about 98.0 W/m/ which depended on the AlN content. Numerical modelling of the heat transfer behavior of the coating layer was well agreement with the empirical data.