TITLE

Chemical ordering around open-volume regions in bulk metallic glass Zr[sub 52.5]Ti[sub 5]Al[sub 10]Cu[sub 17.9]Ni[sub 14.6]

AUTHOR(S)
Asoka-Kumar, P.; Asokar-Kumar, P.; Hartley, J.; Howell, R.; Sterne, P. A.; Sterne, P.A.; Nieh, T. G.; Nieh, T.G.
PUB. DATE
September 2000
SOURCE
Applied Physics Letters;9/25/2000, Vol. 77 Issue 13
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We provide direct experimental evidence for a nonrandom distribution of atomic constituents in Zr[sub 52.5]Ti[sub 5]Al[sub 10]Cu[sub 17.9]Ni[sub 14.6] bulk metallic glass using positron annihilation spectroscopy. The Ti content around the open-volume regions is significantly enhanced at the expense of Ni and Cu. Our results indicate that Ni and Cu atoms closely occupy the volume bounded by their neighboring atoms while Al, Ti, and Zr are less closely packed, and more likely to be associated with the open-volume regions. The overall distribution of elements seen by the positron is not significantly altered by annealing or by crystallization. Theoretical calculations indicate that the observed elemental distribution is not consistent with the known crystalline phases Zr[sub 2]Cu and NiZr[sub 2], while Al[sub 3]Zr[sub 4] shows some of the characteristics seen in the experiment. © 2000 American Institute of Physics.
ACCESSION #
4414920

 

Related Articles

  • Precipitation of icosahedral phase from a supercooled liquid region in... Saida, J.; Matsushita, M. // Applied Physics Letters;11/29/1999, Vol. 75 Issue 22, p3497 

    Studies the precipitation of icosahedral phase from a supercooled liquid region in Zr[sub65]Cu[sub7.5]Al[sub7.5]Ni[sub10]Ag[sub10] metallic glass. Kinetics of the precipitation upon isothermal annealing in the supercooled liquid region; Steady-state nucleation rate; Arrhenius plot between...

  • Initial stages in the decay of the amorphous phase in the bulk metallic glass Zr–Cu–Ti. Abrosimova, G. E.; Aronin, A. S.; Gurov, A. F.; Kir’yanov, Yu. V.; Molokanov, V. V. // Physics of the Solid State;Jul99, Vol. 41 Issue 7, p1027 

    Using methods of x-ray diffraction analysis, differential scanning calorimetry, dilatometry, and transmission electron microscopy, we have investigated the initial stages of decay of the amorphous phase in a bulk metallic glass based on zirconium. We found that crystallization of the bulk...

  • Investigation of the magnetic properties in strontium–borate vanadate glasses. Chinkhota, Manford; Fodor, Petru S.; Khattak, G. D.; Wenger, L. E. // Journal of Applied Physics;5/15/2002 Part 1, 2 & 3, Vol. 91 Issue 10, p8269 

    To further elucidate the nature of the valence state of V ions in vanadate glasses, magnetic susceptibility measurements in the temperature range of 5 to 300 K have been performed on a series of vanadium-strontium-borate (V[sub 2]O[sub 5] + SrO + B[sub 2]O[sub 3]) oxide glasses with V[sub...

  • Bulk metallic glasses. Mukhopadhyay, N. K. // Current Science (00113891);4/25/2007, Vol. 92 Issue 8, p1035 

    The article presents the highlights of the National Workshop on Bulk Metallic Glasses: Science and Technology held in January 2007 in India. Topics raised during the event included conceptual fundamentals as well as different facets of bulk metallic glasses and alloy design principles for better...

  • Simultaneous observation of viscoelastic deformation and induced magnetic anisotropy in [Co1-x(FeNi)x]75Si15B10 metallic glasses. Fernández-Gubieda, M. L.; Barandiarán, J. M.; Nielsen, O. V. // Journal of Applied Physics;9/15/1987, Vol. 62 Issue 6, p2579 

    Provides information on a study wherein amorphous ribbons of a metallic glass was annealed by means of short current pulses while applying a tensile stress. Methods; Results; Discussion.

  • On the resistivity minimum in amorphous metallic spin-glasses (abstract). Koetzler, J.; Thummes, G. // Journal of Applied Physics;5/15/1994, Vol. 75 Issue 10, p6566 

    Presents an abstract of the study 'On the Resistivity Minimum in Amorphous Metallic Spin-Glasses,' by J. Koetzler and G. Thummes, published in the 'Journal of Applied Physics.'

  • Nearly full density Ni52.5Nb10Zr15Ti15Pt7.5 bulk metallic glass obtained by spark plasma sintering of gas atomized powders. Xie, Guoqiang; Louzguine-Luzgin, Dmitri V.; Kimura, Hisamichi; Inoue, Akihisa // Applied Physics Letters;6/11/2007, Vol. 90 Issue 24, p241902 

    Ni-based bulk metallic glasses (BMGs) with a large size were fabricated by spark plasma sintering (SPS) of a gas-atomized Ni52.5Nb10Zr15Ti15Pt7.5 glassy alloy powder. The structure and thermal stability of the sintered specimens as well as the interface characteristics between powder particles...

  • Soft magnetic properties of Fe based amorphous thick sheets with large glass forming ability. Inoue, A.; Makino, A. // Journal of Applied Physics;4/16/1997, Vol. 81 Issue 8, p4029 

    Examines the thermal stability of the supercooled liquid, glass forming ability and magnetic properties of iron-based amorphous alloys. Maximum thickness for glass formation.

  • Effects of gaseous hydrogenation on crystallization behavior of melt-spun Mg63Pr15Ni22 amorphous ribbons. Du, Y. L.; Li, W.; Deng, Y. H.; Xu, F. // Journal of Thermal Analysis & Calorimetry;Jan2010, Vol. 99 Issue 1, p191 

    Effects of gaseous hydrogenation on crystallization behavior of melt-spun Mg63Pr15Ni22 amorphous ribbons have been investigated. The crystallization peak temperature Tp1 shifted to higher temperature with increasing heating rate for the un-hydrogenated Mg63Ni22Pr15 metallic glass, however, it is...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics