Abstract
Metallic glasses exhibit low viscosity in a temperature range between the glass-transition and crystallization temperature which allows successful sintering of glassy powders. Microwave heating being a volumetric heating has significant advantages over conventional heating in materials processing, such as substantial energy savings, rapid heating rates and process cleanness. In the present study, we investigate the stability of the Fe 73Si 7B 17Nb 3, Fe 65Co 10Ga 5P 12C 4B 4, Ni 52.5Zr 15Nb 10Ti 15Pt 7.5, Ni 60Nb 20Ti 15Zr 5, Zr 55Cu 30Al 10Ni 5 and Ti 47.5Zr 10Cu 30Pd 7.5Sn 5 glassy powders and formation of the porous bulk metallic glassy samples by microwave heating in a single-mode cavity with separated electric (E) and magnetic (H) field maxima in an inert atmosphere. The Fe 73Si 7B 17Nb 3 and Fe 65Co 10Ga 5P 12C 4B 4 alloys crystallized upon MW heating in both E- and H-field maxima forming a nanostructure. The Ni 52.5Zr 15Nb 10Ti 15Pt 7.5 and Zr 55Cu 30Al 10Ni 5 alloys were heated well in H-field and were not heated well enough in E-field. In case of Ni 52.5Zr 15Nb 10Ti 15Pt 7.5 and Ni 60Nb 20Ti 15Zr 5 alloys sintered samples were obtained.
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