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Micropatterning kinetics of different glass-forming systems investigated by thermoplastic net-shaping

 
: Sarac, Baran; Bera, Supriya; Spieckermann, Florian; Balakin, Sascha; Stoica, Mihai; Cǎlin, Mariana; Eckert, Jürgen

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Scripta materialia 137 (2017), S.127-131
ISSN: 1359-6462
European Commission EC
FP7-IDEAS-ERC; 340025; INTELHYB
Next Generation of Complex Metallic Materials in Intelligent Hybrid Structures
Englisch
Zeitschriftenaufsatz
Fraunhofer IKTS ()
thermoplastic net-shaping; glass-forming ability; formability kinetics; thermophysical properties; supercooled liquid fragility

Abstract
The formability difference between good and marginal glass-forming systems is investigated by micro-surface patterning of hierarchical features using thermoplastic net-shaping (TPN). For each alloy, a remarkable change in the flow behaviour is observed as the applied force along with the pressing time and temperature are optimized. The flow kinetics of glassy alloys with different glass-forming abilities is best described by the formability parameter S, which is defined by the ratio of the width of the supercooled to undercooled liquid region (Tl − Tg)/(Tx − Tg). Reproducible micro-engineered surfaces with high uniformity can be established by controlled TPN processing.

: http://publica.fraunhofer.de/dokumente/N-442527.html