Journal
MATERIALS LETTERS
Volume 216, Issue -, Pages 12-15Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.12.139
Keywords
PTFE coating; NiTi alloy; Nano-roughened surface; Sputtering; Adhesion
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Polytetrafluoroethylene (PTFE) inherently exhibits deficient bonding to other materials because of its low surface energy. In this study, large-scale nanopatterns were introduced to nickel-titanium (NiTi) to achieve strongly tightened PTFE coating layers on the metal substrate. The nano-roughened NiTi surface was produced using target-ion induced plasma sputtering. Typical porous PTFE coating layers were observed, and PTFE was partially infiltrated into nanoscale pores. The mechanical stability of the PTFE coating was consequently enhanced, indicating the great potential of this coating for medical devices including catheters, stents, and guide wires. (C) 2017 Elsevier B.V. All rights reserved.
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