Mg-Al-Zn系準結晶材料の超高圧力成形と機械的性質

概要

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A new phase called "quasicrystals" was discovered in 1984. The phase has a unique atomic structure, i.e., quasi-periodic structure and fivefold rotation symmetry in crystallography, which makes it neither crystalline nor amorphous (noncrystalline). Because of this atomic structure, superior mechanical properties have been expected. However, it is very difficult to obtain bulk samples of the quasicrystalline alloys, so the research on the mechanical properties and the application is very restricted. In this investigation, the quasicrystalline powder in Mg-Al-Zn alloy made by a mechanical alloying method is consolidated using a high-pressure technique of up to 5.4 GPa, and the pressure-temperature conditions of the quasicrystalline compacts are investigated. The mechanical properties of the obtained samples are also clarified in comparison with crystaline samples.
社団法人日本機械学会の論文
1993-10-25