This study reports the preparation of AlN–TiN ceramic composites with high TiN content, near the percolation threshold, by pressureless sintering and examines their properties. The analysis addresses microstructural characteristics, measured thermal conductivity at room temperature, and electrical resistivity in the 300–700 K temperature range. The study also proposes a mechanism responsible for the drastic change in electrical conductivity in the as-obtained composites.
Omelianenko et al. (Sun,) studied this question.