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Journal of Applied Physics / Volume 106 / Issue 4 / COMMUNICATIONS

J. Appl. Phys. 106, 046101 (2009); http://dx.doi.org/10.1063/1.3204444 (3 pages)

Structural stability and compressibility of group IV transition metals-based bulk metallic glasses under high pressure

Andrew K. Stemshorn and Yogesh K. Vohra

Department of Physics, University of Alabama at Birmingham (UAB), Birmingham, Alabama 35294-1170, USA

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(Received 14 April 2009; accepted 18 July 2009; published online 20 August 2009)

High-pressure x-ray diffraction studies have been carried out on the two group IV transition metals-based bulk metallic glasses (BMGs) Zr57Cu15.4Ni12.6Al10Nb5 and Ti42Zr24Cu15.5Ni14.5Be4 to a pressure of 30 GPa at ambient temperature in a diamond anvil cell. Image plate x-ray diffraction studies under high pressure were carried out at a synchrotron source and the two BMG diffraction bands can be followed to the highest pressure using an internal copper pressure standard. The amorphous phase is observed to be stable to the highest static pressure of 30 GPa suggesting that the phase change observed in dynamical pressure experiments is related to an increase in temperature. The measured bulk modulus (B0) and its pressure derivative (B′) are 118 GPa and 3.11 for Zr-based BMG and 116 GPa and 2.84 for Ti-based BMG. The measured bulk modulus for BMG’s by x-ray diffraction technique is consistent with the ultrasonic measurements. The decompression data reveal an increase in density by 3%–4% at ambient condition after pressure cycling to 30 GPa indicating reduction in excess free volume.

© 2009 American Institute of Physics

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KEYWORDS and PACS

Keywords

aluminium alloys, beryllium alloys, compressibility, copper alloys, elastic moduli, high-pressure effects, metallic glasses, nickel alloys, niobium alloys, titanium alloys, ultrasonic measurement, X-ray diffraction, zirconium alloys

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3204444

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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