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Applied Physics Letters / Volume 100 / Issue 4 / STRUCTURAL, MECHANICAL, OPTICAL, AND THERMODYNAMIC PROPERTIES OF ADVANCED MATERIALS

Appl. Phys. Lett. 100, 041909 (2012); http://dx.doi.org/10.1063/1.3675909 (4 pages)

Synthesis of single-component metallic glasses by thermal spray of nanodroplets on amorphous substrates

Qi An1, Sheng-Nian Luo2, William A. Goddard, III1, W. Z. Han2, B. Arman2, and William L. Johnson3

1Materials and Process Simulation Center, California Institute of Technology, Pasadena, California 91125, USA
2Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
3Keck Engineering Laboratories, California Institute of Technology, Pasadena, California 91125, USA

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(Received 6 September 2011; accepted 6 December 2011; published online 26 January 2012)

We show that single component metallic glasses can be synthesized by thermal spray coating of nanodroplets onto an amorphous substrate. We demonstrate this using molecular dynamics simulations of nanodroplets up to 30 nm that the spreading of the nanodroplets during impact on a substrate leads to sufficiently rapid cooling (1012–1013 K/s) sustained by the large temperature gradients between the thinned nanodroplets and the bulk substrate. However, even under these conditions, in order to ensure that the glass transition outruns crystal nucleation, it is essential that the substrate be amorphous (eliminating sites for heterogeneous nucleation of crystallization).

© 2012 American Institute of Physics

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KEYWORDS, PACS, and IPC

Keywords

drops, glass transition, materials preparation, metallic glasses, molecular dynamics method, nanofluidics, spray coating techniques, spray coatings, substrates, wetting

PACS

International Patent Classification (IPC)

  • C22C45/00

    Amorphous alloys

  • B05D1/02

    Performed by spraying

  • B82B1/00

    Nano-structures

  • C23C4/00

    Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3675909

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

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

For access to fully linked references, you need to log in.
    Z. P. Lu, C. T, Liu, J. R. Thompson, and W. D. Porter, Phys. Rev. Lett. 93, 245503 (2004).

    D. H. Xu, G Duan, and W. L. Johnson, Phys. Rev. Lett. 93, 245504 (2004).

    Y. Qi, T. Cagin, W. L. Johnson, and W. A. Goddard III, J. Chem. Phys. 115, 385 (2001)JCPSA6000115000001000385000001.

    H. J. Lee, T. Cagin, W. L. Johnson, and W. A. Goddard III, J. Chem. Phys. 119, 9858 (2003)JCPSA6000119000018009858000001.

    G. Duan, D. Xu, Q. Zhang, G. Zhang, T. Cagin, W. L. Johnson, and W. A. Goddard III, Phys. Rev. B 71, 224208 (2005).

    S. T. Lin, M. Blanco, and W. A. Goddard III, J. Chem. Phys. 119, 11792 (2003)JCPSA6000119000022011792000001.


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