Prashanth Konda G, Scudino Sergio, Khoshkhoo Mohsen Samadi, Surreddi Kumar B, Stoica Mihai, Vaughan Gavin, Eckert Jürgen
IFW Dresden, Institut für Komplexe Materialien, Postfach 270116, Dresden D-01171, Germany.
European Synchrotron Radiation Facilities (ESRF), BP 220, Grenoble 38043, France.
Materials (Basel). 2011 Dec 22;5(1):1-11. doi: 10.3390/ma5010001.
Thermal stability, structure and mechanical properties of the multi-component ZrTiCuNiAl bulk metallic glass have been studied in detail. The glassy material displays good thermal stability against crystallization and a fairly large supercooled liquid region of 52 K. During heating, the alloy transforms into a metastable icosahedral quasicrystalline phase in the first stage of crystallization. At high temperatures, the quasicrystalline phase undergoes a transformation to form tetragonal and cubic NiZr₂-type phases. Room-temperature compression tests of the as-cast sample show good mechanical properties, namely, high compressive strength of about 1,630 MPa and fracture strain of 3.3%. This is combined with a density of 6.32 g/cm³ and values of Poisson's ratio and Young's modulus of 0.377 and 77 GPa, respectively. The mechanical properties of the glass can be further improved by cold rolling. The compressive strength rises to 1,780 MPa and the fracture strain increases to 8.3% for the material cold-rolled to a diameter reduction of 10%.
多组分ZrTiCuNiAl块体金属玻璃的热稳定性、结构和力学性能已得到详细研究。这种玻璃态材料表现出良好的抗结晶热稳定性，具有52K的相当大的过冷液相区。在加热过程中，合金在结晶的第一阶段转变为亚稳二十面体准晶相。在高温下，准晶相发生转变形成四方和立方NiZr₂型相。铸态样品的室温压缩试验显示出良好的力学性能，即约1630MPa的高抗压强度和3.3%的断裂应变。这与6.32g/cm³的密度以及分别为0.377和77GPa的泊松比和杨氏模量值相结合。通过冷轧可以进一步改善玻璃的力学性能。对于冷轧至直径减小10%的材料，抗压强度升至1780MPa，断裂应变增加至8.3%。
