High-performance elastocaloric materials for the engineering of bulk- and micro-cooling devices
- Pseudoelastic NiTi-based shape-memory alloys (SMAs) have recently received attention as candidate materials for solid-state refrigeration. The elastocaloric effect in SMAs exploits stress-induced martensitic transformation, which is associated with large latent heat. Most importantly, cyclic mechanical loading/unloading provides large adiabatic temperature drops exceeding 25 K at high process efficiencies. This article summarizes the underlying principles, important material parameters and process requirements, and reviews recent progress in the development of pseudoelastic SMAs with large coefficients of performance, as well as very good functional fatigue resistance. The application potential of SMA film and bulk materials is demonstrated for the case of cyclic tensile loading/unloading in prototypes ranging from miniature-scale devices to large-scale cooling units.
| Author: | Jan FrenzelORCiDGND, Gunther EggelerORCiDGND, Eckhard QuandtGND, Stefan SeeleckeGND, Manfred KohlGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-66165 |
| DOI: | https://doi.org/10.1557/mrs.2018.67 |
| Parent Title (English): | MRS bulletin |
| Publisher: | Cambridge University Press |
| Place of publication: | Cambridge |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2019/09/26 |
| Date of first Publication: | 2018/04/11 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Volume: | 43 |
| Issue: | 4 |
| First Page: | 280 |
| Last Page: | 284 |
| Note: | © Copyright Cambridge University Press. Permission for reuse must be granted by Cambridge University Press in the first instance. |
| Institutes/Facilities: | Institut für Werkstoffe, Lehrstuhl Werkstoffwissenschaft |
| open_access (DINI-Set): | open_access |
| faculties: | Fakultät für Maschinenbau |
| Licence (German): |  Nationale Lizenz |
