Jung, C.; Jang, K.; Zhang, S.; Bueno Villoro, R.; Choi, P.-P.; Scheu, C.: Sb-doping induced order to disorder transition enhances the thermal stability of NbCoSn1-xSbx half-Heusler semiconductors. The 20th International Microscopy Congress, PS-07.2. Microscopy of Semiconductor Materials and Devices, Busan, Republic of Korea (2023)
Bueno Villoro, R.: Electron microscopy investigations to understand the transport properties of energy materials. Physics Department, Technical University of Denmark, Kongens Lyngby, Denmark (2023)
Bueno Villoro, R.: Effect of grain boundary phases on the properties of half Heusler thermoelectrics. Northwestern University, Evanston, IL, USA (2023)
Bueno Villoro, R.: Application of NbTiFeSb half Heusler thermoelectric materials. Colloquium, Leibniz-Institut für Festkörper- und Werkstoffforschung, Dresden, Germany (2022)
Mattlat, D. A.; Bueno Villoro, R.; Jung, C.; Naderloo, R. H.; He, R.; Nielsch, K.; Zavanelli, D.; Snyder, G. J.; Zhang, S.; Scheu, C.: Electron microscopy characterization of grain boundaries in Nb1-xTixFeSb based half-Heusler thermoelectric materials. Electron Microscopy Congress (EMC) 2024, Copenhagen, Denmark (2024)
Mattlat, D. A.; Bueno Villoro, R.; Jung, C.; Scheu, C.; Zhang, S.; Naderloo, R. H.; Nielsch, K.; He, .; Zavanelli, D.; Snyder, G. J.: Effective doping of InSbat the grain boundaries in Nb1-xTixFeSb based Half-Heusler thermoelectricsfor high electrical conductivity and Seebeckcoefficient. 40th International & 20th European Conference on Thermoelectrics, Krakow, Poland (accepted)
Bueno Villoro, R.; Zavanelli, D.; Jung, C.; Mattlat, D. A.; Naderloo, R. H.; Pérez, N. A.; Nielsch, K.; Snyder, G. J.; Scheu, C.; He, R.et al.; Zhang, S.: Grain Boundary Phases in NbFeSb Half-Heusler Alloys: A New Avenue to Tune Transport Properties of Thermoelectric Materials. Microscopy of semiconducting materials conference, Cambridge, UK (2023)
We have studied a nanocrystalline AlCrCuFeNiZn high-entropy alloy synthesized by ball milling followed by hot compaction at 600°C for 15 min at 650 MPa. X-ray diffraction reveals that the mechanically alloyed powder consists of a solid-solution body-centered cubic (bcc) matrix containing 12 vol.% face-centered cubic (fcc) phase. After hot compaction, it consists of 60 vol.% bcc and 40 vol.% fcc. Composition analysis by atom probe tomography shows that the material is not a homogeneous fcc–bcc solid solution
Magnetic properties of magnetocaloric materials is of utmost importance for their functional applications. In this project, we study the magnetic properties of different materials with the final goal to discover new magnetocaloric materials more suited for practical applications.