TiCN (50/50) and (70/30) are the two standard qualities of titanium carbonitride you can buy. TiCN is made by nitriding of TiC, depending on the processinf conditions different nitrogen contents are adjusted.
Titanium carbonitride TiCxNy is usually produced by carbothermal reduction of titania in nitrogen atmosphere or by self-propagating high-temperature synthesis in the mixtures of titanium metallic powder with carbon black in nitrogen atmosphere as well. Also you can prepare carbonitride by joint sintering with subsequent homogenizing annealing of TiCx and TiNy powders; however in this case the thorough controlling of gas medium is necessary. It is not a good advice to prepare TiCxNy by the nitridization of TiCx, because in this process the total carbon content in your products does not change practically (it is some kind of carbon conversion from combined to non-combined state) and you will be able to get only carbonitride-carbon mixtures, but not a pure carbonitride. The conversion of TiC0,5N0.5 to TiC0.7N0.3 can be easily realized by high-vacuum high-temperature annealing. Any operations with titanium carbonitrides, oxycarbides or oxycarbonitrides in high-vacuum environment at elevated temperatures leads to to the noticeable losts of nitrogen in solids.
All these and similar things you will be able to find in the 2nd volume of my book on UHTM. The manuscript of it is in preparation by me currently. The chapters of the 1st volume, including "Carbon (Graphene/Graphite) chapter, are available on my ResearchGate account.
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