207 Consolidation of Al-Ni-Zr amorphous alloy powder made by double mechanical alloying and its microstructure and mechanical properties

概要

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Al-Ni-Zr amorphous compacts were produced via Vacuum Hot Press (VHP) technique for various conditions from amorphous powders through double mechanical alloying (DMA), and their mechanical properties were examined. As a result, a relative density of the compact increases as compacting pressure increases, then it becomes constant until 700∿800MPa, and begins to rise over that pressure range, again. When the compacting pressure is the range of the density is stable, the both of the rupture strength and the maximum deflection show the maximum value. Below that pressure, conspact is not packed enough, and above that pressure, the crack inside compact occurs due to over pressure. Therefore, that range of pressure can be thought optimum compacting pressure to form Al-Ni-Zr amorphous consolidation. Further, the effect of consolidation process is also studied from the structural standpoint. As a result, it is understood the most suitable condition of VHP is at the compacting temperature when amorphous phases begin to crystallize.
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