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Abstract Phase stability diagrams for a Ti–W–C–N system were constructed as a function of carbon activity and nitrogen pressure. It was found that the stability domains of titanium carbonitride (Ti(CN))… Click to show full abstract
Abstract Phase stability diagrams for a Ti–W–C–N system were constructed as a function of carbon activity and nitrogen pressure. It was found that the stability domains of titanium carbonitride (Ti(CN)) and W disappeared due to the high stability of the (Ti,W)(CN) phase when the Ti:W molar ratio was 3:1. When the Ti:W molar ratio was changed to 1:1, the phase stability domain of (Ti,W)(CN) reduced and the phase stability diagram consisted of Ti, W, Ti(CN), and (Ti,W)(CN). Finally, when the Ti:W molar ratio was 1:3, the stable region of (Ti,W)(CN) phase disappeared due to the low affinity between W and N. The results of this study can be used as a practical guideline for preparing a toughened (Ti,W)(CN) phase using Ti/W mixtures.
Journal Title: Materials Letters
Year Published: 2017
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