Crystallization in Zr[sub 41.2]Ti[sub 13.8]Cu[sub 12.5]Ni[sub 10]Be[sub 22.5] bulk metallic glass under pressure

Jiang, J. Z.; Jiang, J.Z.; Zhou, T. J.; Zhou, T.J.; Rasmussen, H.; Kuhn, U.; Eckert, J.; Lathe, C.
November 2000
Applied Physics Letters;11/27/2000, Vol. 77 Issue 22
Academic Journal
The effect of pressure on the crystallization behavior of the bulk metallic glass-forming Zr[sub 41.2]Ti[sub 13.8]Cu[sub 12.5]Ni[sub 10]Be[sub 22.5] alloy with a wide supercooled liquid region has been investigated by in situ high-pressure and high-temperature x-ray powder diffraction measurements using synchrotron radiation. In the pressure range from 0 to 3 GPa, the crystallization temperature increases with pressure having a slope of 19 K/GPa, which can be explained by the suppression of atomic mobility. This observation is opposite to the results of W.H. Wang, D.W. He, D.Q. Zhao, and Y.S. Yao [Appl. Phys. Lett. 75, 2770 (1999)], reporting a decrease of the crystallization temperature under pressure in a pressure range of 0-6 GPa for the bulk glass Zr[sub 41]Ti[sub 14]Cu[sub 12.5]Ni[sub 9]Be[sub 22.5]C[sub 1] alloy. Compressibility with a volume reduction of approximately 22% at room temperature does not induce crystallization in the Zr[sub 41.2]Ti[sub 13.8]Cu[sub 12.5]Ni[sub 10]Be[sub 22.5] bulk glass alloy. This indicates that the densification effect induced by pressure in the pressure range investigated plays a minor role in the crystallization behavior of this bulk glass alloy. The different crystallization behavior of the carbon-free and the carbon-containing glassy alloys has been critically assessed. © 2000 American Institute of Physics.


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