Crystal growth of a decagonal Al-Co-Ni quasicrystal

摘要

We have grown a decagonal single quasicrystal with a size of centimeter order in an Al_72Co_16Ni_12 alloy by floating zone method at a growth rate of 0.5 mm/h.The single decagonal quasicrystal has been inspected by Laue X-ray as well as neutron diffraction,revealing a very high quasicrystalline quality.By quenchign hte liquid durign growth,a flat solid-liquid interface,At steady state growth Al is enriched and Co,Ni are depleted in front of solid-,liquid interface.Solute partition ratios of Al,Co and Ni were determined to be about 0.91,1.57 and 1.08,respectively.