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

Kabel, Joey; Hosemann, Peter; Zayachuk, Y.; Armstrong, David E.J.; Koyanagi, Takaaki; Katoh, Yutai; Deck, Christian P.

doi:10.1557/jmr.2017.473

Cited by 39 publications

(16 citation statements)

References 82 publications

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“…Two types of SiC/SiC CMC specimens were examined in this study (Figure 1). They were both purchased from General Atomics and consisted of reinforcing SiC fibers, a pyrocarbon fiber/matrix interphase (~100‐150 nm), and a SiC matrix produced via CVI 14 . Expected fiber content of each CMC was nominally 30 ± 5% by volume.…”

Section: Methodsmentioning

confidence: 99%

Analysis of SiC/SiC composites for energy applications at ambient conditions

et al. 2020

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Plain weave planar and biaxially braided tubular SiC/SiC CMCs are evaluated in tension and four-point bending, respectively, at ambient conditions. Custom-designed fixtures for CMC testing are developed for each loading mode and are coupled with three-dimensional digital image correlation. Stereoscopic image correlation analysis reveals crack initiation and failure sites to provide insight into stress redistribution mechanisms. Scanning electron microscopy is performed postmortem to determine the influence of microstructural features on crack initiation and failure. Crack spacing is measured in situ by stereoscopic image correlation and confirmed by SEM measurements to relate to underlying tow-tow crossing points. Triangulated surface heights of plain weave tow architecture are used to determine that subtle differences in neighboring transverse tow angle, which vary within a range of ±4° from horizontal, have no significant effect on final fracture location. The results presented reaffirm the state of current SiC/SiC CMCs developed for energy applications and will help to further improve SiC/SiC and other CMCs.

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Section: Methodsmentioning

confidence: 99%

Analysis of SiC/SiC composites for energy applications at ambient conditions

et al. 2020

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“…The 2D planar interface between the interphase (usually pyC or BN) and the fibre directly correlates to specific composite characteristics such as the residual clamping stress and the fibre roughness -both of which increase the frictional resistance (8).…”

Section: -Introductionmentioning

confidence: 99%

Optimizing the fiber push‐out method to evaluate interfacial failure in SiC/BN/SiC ceramic matrix composites

et al. 2021

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Accepted Article This article is protected by copyright. All rights reserved The investigation of several parameters during fibre push-out micromechanical tests on the interfacial shear strength (ISS) of the BN interphase in SiC f /SiC ceramic matrix composites (CMC) was undertaken to optimise experimental work. The SiC f /SiC composites-candidate materials for jet engine components-were manufactured with varying fibre types and interlayer thicknesses. Experimental parameters explored included analysing the effect of sample thickness on the success rate of micromechanical tests, the effect of fibre local environment whether at tow-level (intra-tow variability in ISS) or CMC architecture-level (inter-tow variability), the effect of nanoindenter flat-punch tip size & the effect of the interphase thickness itself. Over 1000 fibre push-outs were performed and analysed in this work-with data presented as cumulative distribution functions to compare and contrast samples. It was found that the ISS measured was strongly and statistically influenced by the underlying fibre roughness (interphase adherence), as well as its local fibre environment (e.g. number of nearest neighbours) only if the thickness of the interphase itself surpassed a threshold of 200 nm. Finally for thinner interphases, limited value was added to the CMC as the ISS measured were high and there was no effect from any local environment.

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“…In situ нано-/микро-механическим исследованиям деформационного поведения кристаллических, аморфных и нанокомпозитных материалов посвящен ряд обзоров, опубликованных в последнее десятилетие [114,[117][118][119]. Особенно отметим обширный многоплановый обзор [23] и энциклопедию современных подходов, методов и результатов исследования физико-механических свойств твердых тел и материалов самых различных классов в мультимасштабной размерной шкале от нано-до макро- [19].…”

Section: In Situ исследования механических свойств и динамики структуunclassified

Наноиндентирование И Механические Свойства Материалов В Субмикро- И Наношкале. Недавние Результаты И Достижения (О Б З О Р)

Головин¹

2021

Физика Твердого Тела

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The review discusses the details of various materials mechanical behavior in submicro- and nanoscale. Significant advances in this scope result from the development of wide family of load based precise nanotesting techniques called nanoindentation. But nowadays, nanomechanical properties are studied not only by nanoindentation techniques in narrow sense, i.e. local loading of macro, micro and nanoscale objects. Nanomechanical load testing is discussed here within a wider scope employing precise deformation measurement with nanometer scale resolution caused by various types of low load application to the object under study including uniaxial compression or extension, shearing, bending or twisting, optionally accompanied by in situ monitoring sample microstructure using scanning and transmission electron microscopy and Laue microdiffraction technique. The main courses of experimental techniques development in recent ten years along with the results obtained using them in single, poly and nano crystalline materials, composites, films and coatings, amorphous solids and such biomaterials as tissues, living cells and macromolecules are described. Special attention is paid to deformation size effects and atomic mechanisms in nanoscale. This review is a natural continuation and development of the review published at Fiz.Tverd.Tela vol.50, issue 12, 2008 of the same author that discusses details of nanomechanical properties of solids. Current review includes wider range of nanomechanical testing concepts and recent achievements in the scope. The work was supported by RFBR grant for project #19-12-50235.

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

Abstract: Abstract

Cited by 39 publications

References 82 publications

Analysis of SiC/SiC composites for energy applications at ambient conditions

Analysis of SiC/SiC composites for energy applications at ambient conditions

Optimizing the fiber push‐out method to evaluate interfacial failure in SiC/BN/SiC ceramic matrix composites

Наноиндентирование И Механические Свойства Материалов В Субмикро- И Наношкале. Недавние Результаты И Достижения (О Б З О Р)

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