Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.

The effect of pressure upon crystallization of rapidly supercooled Zirconium melts


Molecular dynamics simulations have been performed to explore the effect of pressure (P) on the crystallization of Zirconium (Zr) under rapid cooling. The structural evolutions have been analysed in terms of the system energy, the pair distribution function and the largest standard cluster analysis. It is found that at the cooling rate of 1.0×1011 K/s that can crystallize Zr melts into hcp crystals via the bcc intermediate state under zero pressure, the critical pressure (Pc) for vitrification is about 28.75 GPa; and the bigger the pressure, the higher the glass transition temperature Tg. At P<PC the Ostwald’s step rule is applied to Zr melts. Crystallization of rapidly super-cooled Zr melts under pressures always begins with bcc phase and ends in hcp crystal; and the higher the pressure, the lower the onset temperature (Tc) of crystallization. Different from the singleintermediate- state crystallization (SisC) under zero pressure, multiple-intermediate-state crystallization (MisC) is usually observed under pressures. Structural analysis reveals that if nucleation is essential completed at the end of the first crystalline (bcc-dominated) stage, MisC will occurs; otherwise SisC. The origination of such observation is also discussed from the effect of pressure upon the thermodynamics and kinetics factors. These findings are useful for comprehensively understanding the solidification of metals under pressures.

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 09 Feb 2017, accepted on 12 Apr 2017 and first published on 13 Apr 2017

Article type: Paper
DOI: 10.1039/C7CP00865A
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
  •   Request permissions

    The effect of pressure upon crystallization of rapidly supercooled Zirconium melts

    H. Zhang, Y. Mo, Z. Tian, R. Liu, L. Zhou and Z. Hou, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP00865A

Search articles by author