Ceramic composites: A review of toughening mechanisms and demonstration of micropillar compression for interface property extraction

Ceramic fiber–matrix composites (CFMCs) are exciting materials for engineering applications in extreme environments. By integrating ceramic fibers within a ceramic matrix, CFMCs allow an intrinsically brittle material to exhibit sufficient structural toughness for use in gas turbines and nuclear rea...

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Vydáno v:	Journal of materials research Ročník 33; číslo 4; s. 424 - 439
Hlavní autoři:	Kabel, Joey, Hosemann, Peter, Zayachuk, Yevhen, Armstrong, David E. J., Koyanagi, Takaaki, Katoh, Yutai, Deck, Christian
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York, USA Cambridge University Press 28.02.2018 Springer International Publishing Springer Nature B.V Materials Research Society
Témata:	Applied and Technical Physics Bending stresses Biomaterials Boron Brittle materials Carbon Ceramic Composite Ceramic fibers Ceramic matrix composites Ceramics Chemical Vapor Chemical vapor deposition Coating Coefficient of friction Composite materials Copyright Crack propagation Deposition Ductility Energy Energy release rate Environmental impact Extreme environments Fiber-matrix interfaces Finite element method Fracture Fracture toughness Gas turbine engines Gas turbines GENERAL STUDIES OF NUCLEAR REACTORS Graphite High temperature Inorganic Chemistry Interfaces Interfacial properties Internal Friction Invited Feature Paper Load Materials Engineering Materials research MATERIALS SCIENCE Microcracks Nano-indentation Nanotechnology Neutron irradiation Nuclear energy Nuclear engineering Nuclear Materials Nuclear reactors Oxidation Physics R&D Radiation Research & development Shear strength Theoretical physics Toughening Toughness United States > US Ceram California nuclear materials nano-indentation coating internal friction neutron irradiation chemical vapor deposition toughness ceramic composite fracture
ISSN:	0884-2914, 2044-5326
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Shrnutí:	Ceramic fiber–matrix composites (CFMCs) are exciting materials for engineering applications in extreme environments. By integrating ceramic fibers within a ceramic matrix, CFMCs allow an intrinsically brittle material to exhibit sufficient structural toughness for use in gas turbines and nuclear reactors. Chemical stability under high temperature and irradiation coupled with high specific strength make these materials unique and increasingly popular in extreme settings. This paper first offers a review of the importance and growing body of research on fiber–matrix interfaces as they relate to composite toughening mechanisms. Second, micropillar compression is explored experimentally as a high-fidelity method for extracting interface properties compared with traditional fiber push-out testing. Three significant interface properties that govern composite toughening were extracted. For a 50-nm-pyrolytic carbon interface, the following were observed: a fracture energy release rate of ∼2.5 J/m2, an internal friction coefficient of 0.25 ± 0.04, and a debond shear strength of 266 ± 24 MPa. This research supports micromechanical evaluations as a unique bridge between theoretical physics models for microcrack propagation and empirically driven finite element models for bulk CFMCs.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 USDOE Office of Nuclear Energy (NE) AC05-00OR22725
ISSN:	0884-2914 2044-5326
DOI:	10.1557/jmr.2017.473