Interphase in Composite Materials

Wang, Min; Bonfield, W.; Li, M.; Guiu, F.

doi:10.4028/www.scientific.net/kem.127-131.583

Cited by 5 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Ceramic Matrix Composites (CMCs) reinforced by continuous fibers, the fiber/matrix interface must be controlled for obtaining non-brittle and high performance materials [1]. This is achieved through a fiber coating called 'interphase' that acts as a mechanical fuse by deflecting the cracks created in the brittle matrix before they reach the fibers [2] [3]. In CMCs developed for applications in aeronautic engines or energy production like SiC/SiC in which both the matrix and the fiber reinforcement are SiC-based, the interphase material of choice is the pyrocarbon (PyC), but its poor oxidation resistance causes embrittlement of these composites when used at high temperature in oxidizing atmosphere [4] [5].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale multilayered and porous carbide interphases prepared by pressure-pulsed reactive chemical vapor deposition for ceramic matrix composites

Jacques¹,

Jouanny²,

Ledain³

et al. 2013

Applied Surface Science

View full text Add to dashboard Cite

International audienceIn Ceramic Matrix Composites (CMCs) reinforced by continuous fibers, a good toughness is achieved by adding a thin film called "interphase" between the fiber and the brittle matrix, which acts as a mechanical fuse by deflecting the matrix cracks. Pyrocarbon (PyC), with or without carbide sub-layers, is typically the material of choice to fulfill this role. The aim of this work was to study PyC-free nanoscale multilayered carbide coatings as interphases for CMCs.Nanoscale multilayered (SiC-TiC)n interphases were deposited by pressure-Pulsed Chemical Vapor Deposition (P-CVD) on single filament Hi-Nicalon fibers and embedded in a SiC matrix sheath. The thicknesses of the carbide interphase sub-layers could be made as low as a few nanometers as evidenced by scanning and transmission electron microscopy. By using the P-ReactiveCVD method (P-RCVD), in which the TiC growth involves consumption of SiC, it was not only possible to obtain multilayered (SiC-TiC) n films but also TiC films with a porous multilayered microstructure as a result of the Kirkendall effect. The porosity in the TiC sequences was found to be enhanced when some PyC was added to SiC prior to total RCVD consumption. Because the porosity volume fraction was still not high enough, the role of mechanical fuse of the interphases could not be evidenced from the tensile curves, which remained fully linear even when chemical attack of the fiber surface was avoided

show abstract