About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing for Energy Industry
|
| Presentation Title |
Process-Property Correlations of Additively Manufactured CuNi Thermoelectric alloys for Improved Performance |
| Author(s) |
Anthony Duong |
| On-Site Speaker (Planned) |
Anthony Duong |
| Abstract Scope |
Cu–Ni thermoelectric alloys are attractive for high-temperature energy harvesting applications but require microstructural optimization to improve performance. In this study, Cu65Ni35 alloys were fabricated using Laser Directed Energy Deposition as multi-track cuboids processed at varying energy fluences (EF). Thermoelectric properties and microstructures were evaluated as a function of build height. The sample fabricated at an EF of 1.16 W/mm2 exhibited the highest performance, with a thermal conductivity of 24 W/K·m and a figure of merit (ZT) of 0.05. Build-height-dependent changes in thermal conductivity and thermoelectric performance were observed and are attributed to variations in grain morphology and nickel segregation with build height. Reduced cyclic reheating in recently deposited layers promoted the formation of equiaxed grains and Ni-rich banding, which enhance phonon scattering and suppress thermal transport. Overall, these results demonstrate that AM-induced thermal histories can be exploited to improve the thermoelectric performance of Cu–Ni alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Copper / Nickel / Cobalt |