On the role of brittle interfacial phases on the mechanical properties of carbon fibre reinforced Al-based matrix composites

Tensile and fatigue behavior of Al-based metal matrix composites reinforced with continuous carbon or alumina fibers: Part I. Quasi-unidirectional composites

“…These heat treatments, especially in the case of the K139/A357 quasi-UD composite, were also defined in order to obtain a good compromise as regards the strength of the matrix without degradation in the mechanical properties of the composite through fiber-matrix chemical reactions. [3] Finally, the absence of large defects is confirmed through X-ray radiography of each plate.…”

“…This microstructure is quite similar to that observed in UD composites having the same A357 matrix. [3] As regards the reactivity of the carbon fibers with the A357 matrix, it should be noted that some Al 4 C 3 needles were observed on the K139 fibers.…”

“…In fact, when used in either totally reinforced composite parts or components with a local reinforcement, optimum characteristics of this high-performance casting alloy may be obtained through an appropriate heat treatment. [3] Furthermore, in each case, a "reference system" is considered, which consists of the same fiber preform embedded in the very low yield stress (A9, Ͼ99.99 wt pct Al) pure aluminum matrix. These two additional systems, N610/A9 and K139/A9, may permit a direct comparison of these two strongly different fibers via the mechanical behavior of these two quasi-UD composites possessing the same matrix.…”

“…[1][2][3][4][5][6][7][8][9] Moreover, the possibilities of obtaining near net shape parts and of tailoring the thermal conductivity or the coefficient of thermal expansion of such MMCs constitute essential advantages. However, when used in the form of unidirectional (UD) composites, these materials present limitations, such as inhomogeneous fiber distribution due to fiber clustering during metal infiltration and very low transverse properties leading to a strong anisotropy.…”

Plasma And Cold Sprayed Aluminum Carbon Nanotube Composites: Quantification Of Nanotube Distribution And Multi-Scale Mechanical Properties

“…Vidal-Setif et al have shown reduction in the strength and premature failure of 75 vol.% carbon fiber reinforced A357 alloy due to formation of Al 4 C 3 and presence of brittle Si particles [195]. So formation of Al 4 C 3 needs to be avoided.…”