| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Coatings to Protect Materials from Extreme Environments
|
| Presentation Title |
Electrodeposition of Functionally-graded Interlayers for Joining Plasma-facing Components and Heat-sinks for Nuclear Fusion Reactors |
| Author(s) |
Katherine Lee, Brian Skinn, Steve Snyder, Maria Inman |
| On-Site Speaker (Planned) |
Katherine Lee |
| Abstract Scope |
The development of robust heat-sink and plasma-facing components (PFCs) suitable for high-heat flux applications is critical for the design of divertors in nuclear fusion reactors. For ITER-type divertor targets, which use tungsten PFCs and copper-alloy heat sinks, the extreme mismatch in the coefficient of thermal expansion (CTE) of these two materials has prevented them from reaching the performance metrics necessary for use in fusion reactors using conventional joining methods. Interlayers comprised of functionally-graded materials (FGMs) can overcome this mismatch by imparting gradual changes in CTE; however, selection of suitable fabrication methods for FGM relevant to fusion applications – such as Cu/WC composites and Fe/W alloys – remains a challenge. In this work, the feasibility of electrodeposition fabrication of FGMs suitable for use as CTE-matching interlayers is demonstrated and the ability to achieve compositional control during electroplating through the use of direct current, pulse, and pulse-reverse waveforms is evaluated. |