Synthesis of single-component metallic glasses by thermal spray of nanodroplets on amorphous substrates
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Authors
An, Qi
Luo, Sheng-Nian
Goddard III, William A.
Han, Weizhong
Arman, B.
Johnson, William L.
Issue Date
2012
Type
Article
Language
Keywords
Alternative Title
Abstract
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 (10^(12)–10^(13) 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)
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Publisher
AIP Publishing
License
In Copyright
Journal
Volume
Issue
PubMed ID
ISSN
0003-6951