Abstract
A laminated Ti(C, N)-based cermet/LaCrO3–Y2O3 composite which is used for making smart temperature measuring cutting tool was prepared by spark plasma sintering. In this work, the interfacial microstructure and resistance-temperature (R-T) characteristics of double-layer and triple-layer structures with different layer thicknesses of LaCrO3–Y2O3 were investigated, the mechanism of interfacial evolution and changes in R-T characteristics of double-layer composites prepared at different sintering temperatures were studied, and the temperature measuring performance of the smart tool was tested. The results indicated as the thermosensitive ceramic layer thickness was 1.5 mm, the laminated composites showed the best performance. For the double-layer structure, its starting measuring temperature was 457K, and the thermal constant B reached 14194K. Cutting tests showed the resistance of the smart tool fluctuated sharply with cutting time, and the resistance variation reached up to 2 × 108Ω within 1 s, which indicated that the smart cutting tool had a short response time and high temperature measuring sensitivity.
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