About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Ceramic Materials and Processing
|
Presentation Title |
Additively Formed Composite Carbide Fibers |
Author(s) |
Kenan Fronk , Charles A. Cook, Gregory B. Thompson |
On-Site Speaker (Planned) |
Gregory B. Thompson |
Abstract Scope |
Laser Chemical Vapor Deposition (LCVD) can be used as an additive process in which freestanding fibers are deposited. This is achieved by the thermal dissociation of a precursor gas-to-solid form under a translating laser focal point. Using a metal-chloride vapor precursor along with a hydrocarbon and hydrogen gas mixture, LCVD enables a variety of formation from a single phase to multiphase fiber. Specifically, these fibers can exhibit a carbon core that is surrounded by a transition metal carbide outer shell or hollow interior region with a carbide exterior. Using TiC and C as our experimental systems, this talk will discuss the influence of gas mixtures and laser power in controlling the reaction kinetics that enable a variety of LCVD fiber growths. Specifically, the manipulation of the Soret effect and temperature gradients in regulating gas particle partitioning for deposition will be explained. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Process Technology, High-Temperature Materials |