Development and Performance of Tungsten-Coated Graphitic Foam for Plasma-Facing Components

Youchison, Dennis L.; Coenen, J. W.; Gray, Travis K.; Lumsdaine, Arnold; Klett, James W.; Jolly, Brian C.; Gehrig, Monica; Brezinsek, S.; Rasinski, M.

doi:10.1080/15361055.2019.1607706

Title: Development and Performance of Tungsten-Coated Graphitic Foam for Plasma-Facing Components

Journal Article · Thu May 23 00:00:00 EDT 2019 · Fusion Science and Technology

DOI:https://doi.org/10.1080/15361055.2019.1607706· OSTI ID:1559710

^[1];

^[2];

^[1];

^[1]; Jolly, Brian C. ^[1]; Gehrig, Monica ^[3]; Brezinsek, S. ^[2]; Rasinski, M. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Forschungszentrum Julich, Julich (Germany)
Missouri Univ. of Science and Technology, Rolla, MO (United States)

High-density graphitic foam is an ideal low-Z plasma-facing material for deuterium-deuterium plasma experiments where tritium codeposition is not an issue. However, like all carbon, graphitic foam suffers from a precipitous drop in thermal conductivity at high temperatures, >600°C. To mitigate these problems, functionally graded layers of tungsten can be deposited to a thickness of 2 to 4 mm onto the plasma side of the foam using chemical vapor deposition. The graphitic foam then acts as a high-conductivity heat sink at temperatures below 600°C for the thin high-Z armor coating. The overall component weighs 18 times less than a comparable volume of tungsten and lacks the coefficient of thermal expansion joining issues between the CuCrZr tubing and the tungsten. This paper discusses the coating development and characterization and presents the results of recent plasma exposures in W7-X. It also reports on computational fluid dynamics heat transfer modeling and preparations for high heat flux testing of mock-ups. This hybrid plasma-facing component (PFC) consisting of innovative engineered materials may be a cost-effective, actively cooled solution for the divertors and other PFCs in long-pulse machines like W7-X and WEST.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1559710

Journal Information:: Fusion Science and Technology, Vol. 75, Issue 6; ISSN 1536-1055

Publisher:: American Nuclear SocietyCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 2 works

Citation information provided by
Web of Science

References (10)

Structural and mechanical characterization of graphite foam/phase change material composites Canseco, Vladimir; Anguy, Yannick; Roa, Joan Josep Carbon, Vol. 74 https://doi.org/10.1016/j.carbon.2014.03.031	journal	August 2014
Chemical vapor deposition of Mo tubes for fuel cladding applications Beaux, Miles F.; Vodnik, Douglas R.; Peterson, Reuben J. Surface and Coatings Technology, Vol. 337 https://doi.org/10.1016/j.surfcoat.2018.01.063	journal	March 2018
High heat flux facility GLADIS: Greuner, H.; Boeswirth, B.; Boscary, J. Journal of Nuclear Materials, Vol. 367-370 https://doi.org/10.1016/j.jnucmat.2007.04.004	journal	August 2007
Integrated plasma facing component calorimetry for measurement of shot integrated deposited energy in the NSTX-U Gray, T. K.; Allen, N.; Reinke, M. L. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5039337	journal	October 2018
Engineering Challenges in W7-X: Lessons Learned and Status for the Second Operation Phase Bosch, H. -S.; Andreeva, T.; Brakel, R. IEEE Transactions on Plasma Science, Vol. 46, Issue 5 https://doi.org/10.1109/TPS.2018.2818934	journal	May 2018
High heat-flux response of high-conductivity graphitic foam monoblocks Youchison, Dennis; Gehrig, Monica; Lumsdaine, Arnold Fusion Engineering and Design, Vol. 146 https://doi.org/10.1016/j.fusengdes.2018.12.081	journal	September 2019
The role of structure on the thermal properties of graphitic foams Klett, J. W.; McMillan, A. D.; Gallego, N. C. Journal of Materials Science, Vol. 39, Issue 11 https://doi.org/10.1023/B:JMSC.0000030719.80262.f8	journal	June 2004
A multi-purpose manipulator system for W7-X as user facility for plasma edge investigation Nicolai, D.; Borsuk, V.; Drews, P. Fusion Engineering and Design, Vol. 123 https://doi.org/10.1016/j.fusengdes.2017.03.013	journal	November 2017
Plasma exposures of a high-conductivity graphitic foam for plasma facing components Youchison, D. L.; Brezinsek, S.; Lumsdaine, A. Nuclear Materials and Energy, Vol. 17 https://doi.org/10.1016/j.nme.2018.10.002	journal	December 2018
Prototyping phase of the high heat flux scraper element of Wendelstein 7-X Boscary, J.; Greuner, H.; Ehrke, G. Fusion Engineering and Design, Vol. 109-111 https://doi.org/10.1016/j.fusengdes.2016.02.001	journal	November 2016

Similar Records

Predicted Heat Flux Performance of Actively Cooled Tungsten-Armored Graphitic Foam Monoblocks

Journal Article · Fri Apr 23 00:00:00 EDT 2021 · Fusion Science and Technology · OSTI ID:1559710

Youchison, Dennis; Klett, James; Williams, Brian; +1 more

Developing solid-surface plasma facing components for pilot plants and reactors with replenishable wall claddings and continuous surface conditioning. Part A: concepts and questions

Journal Article · Tue Apr 12 00:00:00 EDT 2022 · Plasma Physics and Controlled Fusion · OSTI ID:1559710

Stangeby, P. C.; Unterberg, E. A.; Davis, J. W.; +12 more

Microengineered Textured Armor for Plasma-Facing Components

Technical Report · Mon Mar 26 00:00:00 EDT 2018 · OSTI ID:1559710

Williams, Brian E.; Arrieta, Victor M.

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Graphitic foam
tungsten
coating
divertor
plasma-facing component

Title: Development and Performance of Tungsten-Coated Graphitic Foam for Plasma-Facing Components

Citation Formats

References (10)

Similar Records

Related Subjects