Crystallization of Pd₄0Cu₃0Ni₁0P₂0 bulk metallic glass with and without pressure

Bin Yang1,2), Jianzhong Jiang3), Yanxin Zhuang3), Karel Saksl3), and Guoliang Chen1) 1) State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China 2) International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China 3) Department of Physics, Building 307, Technical University of Denmark, DK-2800 Lyngby, Denmark

摘 要：The glass-transition behavior of Pd40Cu30Ni10P20 bulk metallic glass was investigated by differential scanning calorimetry （DSC） and X-ray powder diffraction （XRD）. The effect of pressure on the crystallization behavior of Pd40Cu30Ni10P20 bulk glass was studied by in situ high-pressure and high-temperature X-ray powder diffraction using synchrotron radiation. Phase analyses show at least six crystalline phases in the crystallized sample, namely, monoclinic, tetragonal Cu3Pd-like, rhombohedral, fcc-Ni2Pd2P, fcc-（Ni, Pd） solid solution, and body-centered tetragonal （bct） Ni3P-like phases. The onset crystallization temperature increases with pressure having a slope of 11 K/GPa in the range of 0 to 4 GPa. The results are attributed to the competing process between the thermody-namic potential barrier and the diffusion activation energy under pressure.

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