The influence of TiN content on properties of Ti(CN) solid solution

Samples of Ti(CN) solid solution of various TiN content were prepared by hot pressing. Phase composition and lattice parameters of the samples were analysed by X-ray diffraction and metallography. Wetting characteristics of CoNi(1:1) to the samples and solubility of WC, Mo2C, TaC and NbC in the solid solution were studied in detail. olved Mo2C (and/or W2C) particles were found in the 4th sample (R = 0.7, R =TiN/TiN+TiC), and more undissolved Mo2C (and/or W2C) and a little Mo in the 5th sample (R = 0.9). Because more TiN decomposed in the 5th sample, carbon atoms of the Mo2C in the sample entered partly into the Ti(CN) solid solution. tting characteristics of CoNi(1:1) to the samples can be improved by adding WC and TaC to the solid solution. When R = 0.7 and 0.9, the samples cannot be wetted by CoNi(1:1) under vacuum at about 1500 °C. The melting temperature of CoNi increases with an increase in the R value of the samples, and decreases with an increase in WC and TaC content.