Quasicrystals in Al-Cu-TM (TM=transition metal) systems.

Room Temperature Oxidation of Al-Cu-Fe and Al-Cu-Fe-Cr Quasicrystals

We have investigated formation of oxides on quasicrystalline and crystalline alloy surfaces of similar composition, in different oxidizing environments. This includes a comparison between a quaternary orthorhombic approximate of Al-Cu-Fe-Cr quasicrystal and the ternary AI-Cu-Fe quasicrystalline and crystalline phases. We noted that each sample showed the following common trends: preferential ox...

NMR and NQR study of the electronic and structural properties of Al-Cu-Fe and Al-Cu-Ru quasicrystals.

Al-based Thin Film Quasicrystals and Approximants

Medium-sized double magic metal clusters: Al@Cu(54) (-) and Al@Ag(54) (-).

Medium-sized double magic metal clusters, Al@Ag(54) (-) and Al@Cu(54) (-), are predicted based on unbiased global search and density functional calculation. Both bimetallic core-shell clusters have icosahedral symmetry, and they are much lower in energies than all other low-lying isomers. In contrast, the icosahedral cluster Al@Au(54) (-) is a high-energy isomer. Both Al@Ag(54) (-) and Al@Cu(54...

Phason Relaxation Mechanisms in Al-Pd-Mn Single-Quasicrystals

Quasicrystals represent a new state of condensed matter which exhibits long-range quasiperiodic translational order and orientational order with noncrystallographic symmetry. Mechanical spectroswpy was applied for the study of defect properties in stable icosahedral singlequasicrystalliine AlPd-Mn samples. Two mechanical loss maxima appear at 360 K and 870 K for a measuring frequency of f S 3 H...