Development of Heusler-alloy. based magnetocaloric inks for 2D - 3D printing

Abstract

This doctoral thesis explores sustainable cooling technologies through the magnetocaloric effect. Focusing on NiMn-based Heusler alloys, the research investigates the impact of composition and annealing effect on magnetic and magnetocaloric properties. Melt-spun ribbons undergo a systematic heat treatments, and a refined powder preparation from the ribbons seeks the preservation of magnetocaloric properties. The implementation in additive manufacturing of magnetocaloric materials is done developing a cost-effective 3D printing technique and using cellulose as an environmentally friendly polymeric alternative exploring the novel cold extrusion 3D printing technique.Post-printed structures undergo a meticulous heat treatments for obtaining fully metallic structures, balancing mechanical integrity with magnetocaloric effects. The objective is to demonstrate sustained retention of magnetocaloric properties throughout alloy fabrication, heat treatment, grinding, additive manufacturing, and sintering. The findings contribute insights into practical applications of Heusler alloys and advance materials with enhanced magnetocaloric functionalities in additive manufacturing, offering a significant contribution to the quest for energy-efficient cooling solutions.