Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5450349 | Progress in Natural Science: Materials International | 2017 | 5 Pages |
Abstract
Thermal behaviors and structures of three Zr-based binary glass formers, Zr50Cu50, Zr64Cu36 and Zr64Ni36, were investigated and compared using differential scanning calorimetry (DSC), transmission electron microscopy (TEM), high energy X-ray diffraction (XRD) and small angle X-ray scattering (SAXS). The high energy XRD results show that the bulk glass former Zr50Cu50 has a denser atomic packing efficiency and reduced medium-range order than those of marginal glass formers Zr64Cu36 and Zr64Ni36. Based on TEM observations for the samples after heat treatment at 10Â K above their crystallization onset temperatures, the number density of crystals for Zr50Cu50 was estimated to be 1023-1024Â mâ3, which was four-orders higher than that in Zr64Cu36 and Zr64Ni36 metallic glasses. SAXS results indicate that Zr50Cu50 has higher degree of nanoscale inhomogeneities than those in Zr64Cu36 and Zr64Ni36 at as-cast state. The observed multiscale structures are discussed in terms of the phase stability and glass-forming ability of Zr-based binary glass formers.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Xuelian Wu, Si Lan, Zhenduo Wu, Xiaoya Wei, Yang Ren, Ho Yin Tsang, Xunli Wang,