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http://dx.doi.org/10.7234/composres.2021.34.4.249

Effects of the Gas Flow Inside a CVI Reactor on the Densification of a C/C Composite  

Kim, Hye-gyu (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology)
Ji, Wooseok (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology)
Kwon, Hyang Joo (Dacc Carbon, Co., Ltd.)
Yoon, Sungtae (Dacc Carbon, Co., Ltd.)
Kim, Jung-il (Dacc Carbon, Co., Ltd.)
Publication Information
Composites Research / v.34, no.4, 2021 , pp. 249-256 More about this Journal
Abstract
In this paper, the densification of a carbon/carbon composite during a chemical vapor infiltration (CVI) process is studied using a chemo-mechanical model. The multi-physics numerical model, developed in the previous research, couples computational fluid dynamics and major chemical reactions in the reactor. The model is especially utilized to study the effect of flow behavior around the preform on the densification. Four different types of "flow-guide" structures are placed to alter the gas flow around the preform. It is shown that the flow pattern and speed around the preform can be controlled by the guide structures. The process simulations demonstrate that the average density and/or density distribution of the preform can be improved by controlling the gas flow around the perform. In this study, a full industrial-scale reactor and process parameter were used.
Keywords
Carbon/carbon composite; Chemical vapor infiltration;
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