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- Title
Multiscale Characterization of Isotropic Pyrolytic Carbon Used for Mechanical Heart Valve Production.
- Authors
Serino, Gianpaolo; Gusmini, Mattia; Audenino, Alberto Luigi; Bergamasco, Giovanni; Ieropoli, Ornella; Bignardi, Cristina; Todros, Silvia
- Abstract
Usage of pyrolytic carbon (PyC) to produce mechanical heart valves (MHVs) has led to heart valve replacement being a very successful procedure. Thus, the mechanical properties of employed materials for MHV production are fundamental to obtain the required characteristics of biocompatibility and wear resistance. In this study, two deposition methods of PyC were compared through a multiscale approach, performing three-point bending tests and nanoindentation tests. Adopted deposition processes produced materials that were slightly different. Significant differences were found at the characteristic scale lengths of the deposited layers. Setting changes of the deposition process permitted obtaining PyC characterized by a more uniform microstructure, conferring to the bulk material superior mechanical properties.
- Subjects
MECHANICAL hearts; HEART valves; MECHANICAL behavior of materials; NANOINDENTATION tests; PYROLYTIC graphite; BULK solids; NANOINDENTATION
- Publication
Processes, 2021, Vol 9, Issue 2, p338
- ISSN
2227-9717
- Publication type
Article
- DOI
10.3390/pr9020338