Investigation of the conditions required for the formation of (Ti,W)(CN) during carburization of titanium under nitrogen
- Authors
- Kwon, Hanjung; Moon, Ahram; Kim, Wonbaek; Kim, Jiwoong
- Issue Date
- Dec-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Phase diagrams; Ceramics; Titanium carbonitride; Stability domain; Thermodynamics
- Citation
- MATERIALS LETTERS, v.209, pp.287 - 290
- Journal Title
- MATERIALS LETTERS
- Volume
- 209
- Start Page
- 287
- End Page
- 290
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/39261
- DOI
- 10.1016/j.matlet.2017.08.024
- ISSN
- 0167-577X
- 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. (C) 2017 Elsevier B.V. All rights reserved.
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