Fabrication and optimization of n-type half Heusler materials via mechanical alloying
Date
Authors
University
Faculty
Πολυτεχνική Σχολή
Faculty of Engineering
Faculty of Engineering
Department
Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής
Department of Mechanical and Manufacturing Engineering
Department of Mechanical and Manufacturing Engineering
Abstract
Στη διδακτορική διατριβή πραγματοποιήθηκε σύνθεση n-τύπου half-Heusler με τη μέθοδο της μηχανικής κραμάτωσης στοχεύοντας στην ανάπτυξη υλικών με δομικά χαρακτηριστικά σε ατομικό, νανο- και μικρο-επίπεδο για μειωμένη θερμική αγωγιμότητα. Η μέγιστη θερμοηλεκτρική απόδοση είναι περί το 0.7 στους 763Κ και επιτεύχθηκε στις στοιχειομετρίες Ti0.4Zr0.6NiSn0.985Sb0.015 και (Ti0.4Zr0.6)0.7Hf0.3NiSn0.98Sb0.02.
In this PhD thesis, n-type half-Heusler materials via mechanical alloying aiming to develop materials with structural features at atomic, nano – and micro- level for the reduction of the thermal conductivity. The best thermoelectric figure of merit was about 0.7 at 763K and it was achieved in Ti0.4Zr0.6NiSn0.985Sb0.015 and (Ti0.4Zr0.6)0.7Hf0.3NiSn0.98Sb0.02 compositions.
In this PhD thesis, n-type half-Heusler materials via mechanical alloying aiming to develop materials with structural features at atomic, nano – and micro- level for the reduction of the thermal conductivity. The best thermoelectric figure of merit was about 0.7 at 763K and it was achieved in Ti0.4Zr0.6NiSn0.985Sb0.015 and (Ti0.4Zr0.6)0.7Hf0.3NiSn0.98Sb0.02 compositions.