Transmission Electron Microscopy Study of the Atomic Structure of Amorphous Ti-Ta-Ni Surface Alloy
Viktor O. Semin
Abstract. This paper presents experimental results of studying of the atomic (clustered) structure of an amorphous Ti-Ta-Ni surface alloy using real-space radial distribution functions (RDF) and transmission electron microscopy (TEM). The characterization of the structure by electron diffraction methods has shown that the surface alloy of a 2 μm thickness is completely amorphous without any crystalline phases. Based on the electron diffraction data chemical and topological short-range order and a certain degree of medium-range order in this alloy are found. It is also shown that topological short-range order in the amorphous Ti-Ta-Ni surface alloys is well approximated by the coordination polyhedra based on the intermetallic compounds Ti2Ni and B2(TiNi): the icosahedron Ti7Ni6 and the rhombic dodecahedron Ti7Ni8.
Keywords
Surface Alloy, Amorphous Structure, Short-Range Order, Radial Distribution Function
Published online 11/15/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Viktor O. Semin, ‘Transmission Electron Microscopy Study of the Atomic Structure of Amorphous Ti-Ta-Ni Surface Alloy’, Materials Research Proceedings, Vol. 9, pp 68-73, 2018
DOI: https://dx.doi.org/10.21741/9781644900017-14
The article was published as article 14 of the book Shape Memory Alloys
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