Rapid chemical and topological ordering in supercooled liquid Cu46Zr54
| Title | Rapid chemical and topological ordering in supercooled liquid Cu46Zr54 |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Wessels V, Gangopadhyay AK, Sahu KK, Hyers RW, Canepari SM, Rogers JR, Kramer MJ, Goldman AI, Robinson D, Lee JW, Morris JR, Kelton KF |
| Journal Title | Physical Review B |
| Volume | 83 |
| Pages | 094116 |
| Date Published | 03 |
| Type of Article | Article |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000288317900004 |
| Keywords | amorphous-alloys, binary, BULK METALLIC-GLASS, forming ability, model, molecular-dynamics, structural, transition, x-ray-diffraction |
| Abstract | Evidence for rapid ordering in a supercooled Cu46Zr54 liquid, obtained from high-energy x-ray diffraction in a containerless processing environment, is presented. Relatively sudden changes were observed in the topological and chemical short-range order near 850 degrees C, a temperature that is 75 degrees C below the liquidus temperature and 465 degrees C above the glass transition temperature. A peak in the specific heat was observed with supercooling, with an onset near 850 degrees C (the same temperature as the onset of ordering) and a maximum near 700 degrees C, consistent with the prediction of a molecular-dynamics calculation using embedded atom potentials. The chemical and topological ordering measured here are in agreement with predictions of a rapid development of chemically ordered icosahedral clusters in the supercooled liquid. |
| URL | <Go to ISI>://000288317900004http://prb.aps.org/pdf/PRB/v83/i9/e094116 |
| DOI | 10.1103/PhysRevB.83.094116 |
| Alternate Journal | Phys. Rev. B |
