Nucleation and growth in bulk metallic glass under high pressure investigated using in situ x-ray diffraction

Wang, W.H.; Wen, P.; Zhao, D.Q.; Pan, M.X.; Okada, T.; Utsumi, W.
December 2003
Applied Physics Letters;12/22/2003, Vol. 83 Issue 25, p5202
Academic Journal
The effects of pressure up to 8.3 GPa on nucleation and growth in a Zr[sub 57]Nb[sub 5]Cu[sub 15.5]Ni[sub 12.5]Al[sub 10] bulk glass-forming alloy during heating, isothermal annealing, and cooling processes are investigated using in situ x-ray diffraction with synchrotron radiation. The metallic glass shows markedly different crystallization behaviors for different heat treatments under high pressure. Heating under high pressure can stabilize the supercooled liquid state. Isothermal high pressure annealing leads to nanocrystallization. The glass forming ability of the alloy can be enhanced by high pressure during cooling process. The effects of pressure on the nucleation and growth are discussed based on the nucleation theory. © 2003 American Institute of Physics.


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