About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Alloys and Compounds for Thermoelectric and Solar Cell Applications XI
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Presentation Title |
C-3: Interfacial Reactions in Cu/Se, Cu2Se/Te and Cu2Te/Se Couples |
Author(s) |
Yohanes Hutabalian, Sinn-wen Chen |
On-Site Speaker (Planned) |
Yohanes Hutabalian |
Abstract Scope |
Cu2Se-based and Cu2Te-based alloys are important thermoelectric materials. Interfacial reactions in the Cu/Se, Cu2Se/Te and Cu2Te/Se couples are determined in this study. Reaction products of CuSe2, Cu3Se2, CuSe and Cu2Se are observed in the Cu/Se reacted couple at 300oC. The Cu2Se/Te couple is prepared by heating Cu2Se substrate and Te shots together at 500oC for a very short time. Te melts and surrounds the Cu2Se substrate, and the Cu2Se/Te couple is quenched immediately. A very thick reaction zone is found in the as-quenched sample. A ternary compound, Cu3SeTe, is observed. The reaction path is Cu2Se/Cu3SeTe/CuTe/liquid at 500℃. A complicated reaction phases are observed found in the Cu2Te/Se couple reacted at 300oC. For only 10 min, a very thick layer of 147 mm thickness with various phases are found in the couple Cu2Te/Se. It is presumed that the Cu is the fastest diffusion species in both couples. |
Proceedings Inclusion? |
Planned: |
Keywords |
Electronic Materials, Phase Transformations, Joining |