Thermal conductivity of kappa-Al2O3 and alpha-Al2O3 wear-resistant coatings

摘要

The thermal conductivities of alpha-Al2O3 and kappa-Al2O3 wear-resistant coatings are measured using the 3 omega method in the temperature range 80 300 K. The relatively small thermal conductivity of kappa-Al2O3, a factor of similar to 3 smaller than alpha-Al2O3, suggests that this metastable phase of alumina can be applied as an effective thermal barrier for cutting tools. (C) 1998 American Institute of Physics. S0021-8979(98)08810-0. References: 24