Thermal conductivity of diamond particle dispersed aluminum matrix composites fabricated in solid–liquid co-existent state by SPS

Mizuuchi, Kiyoshi; Inoue, Kohei; Agari, Yasuyuki; Morisada, Yoshiaki; Sugioka, Masami; Tanaka, Motohiro; Takeuchi, Takashi; Kawahara, Masakazu; Makino, Yukio

doi:10.1016/j.compositesb.2011.03.028

Cited by 70 publications

(17 citation statements)

References 28 publications

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“…Thermal stresses cause plastic yielding or failure of the material, 7 which can be relaxed by exploiting interface debonding, micro plasticity of the metal matrix and/or crack initiation and propagation. 8 The degradation mechanism of a weak interface in MMCs is debonding and cracking, tested at a zero load thermal fatigue. On a contrary, the degradation mechanism of a strong interface supports matrix plastic deformation with interfacial product formation.…”

mentioning

confidence: 99%

Influence of residual thermal stresses on fatigue crack growth life of discontinuous reinforcements in metal matrix composites

Tevatia

Srivastava

2016

Fatigue Fract Eng Mat Struct

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The fatigue life prediction model based on crack propagation from micro‐structural features is derived and presented for planar and randomly oriented Discontinuous Reinforced Metal Matrix Composites (DRMMCs). The model contains the influence of micro‐structural properties such as aspect ratio, volume fraction of particle/fibre and constraint between particle and the matrix. The effect of residual thermal stresses generated within the matrix during development of composite is considered. The particle/fibre plays a dominant role in the development of the cyclic plastic zone size ahead of the crack tip; moreover, it enhances the cyclic plastic deformation characteristics of DRMMC. The theoretical model‐based evaluations for low cycle fatigue in DRMMCs are within the proximity of the experimental results.

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mentioning

confidence: 99%

Influence of residual thermal stresses on fatigue crack growth life of discontinuous reinforcements in metal matrix composites

Tevatia

Srivastava

2016

Fatigue Fract Eng Mat Struct

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“…However, the addition of alloying element leads to a large TC degradation of aluminum matrix which is unfavorable to develop the full potential of both aluminum and Gr f . For instance, the TC of pure Al was up to 210 W m -1 K -1 , while those of Al-5Si and Al-Mg alloy were 150 and 117 W m -1 K -1 [17,18], respectively. In contrast, surface modification of Gr f s is a direct and effective method to promote wetting and shield the fibers from excessive interfacial reaction with liquid aluminum [19].…”

Section: Introductionmentioning

confidence: 98%

Effect of chromium carbide coating on thermal properties of short graphite fiber/Al composites

Liu

et al. 2014

J Mater Sci

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A chromium carbide coating was synthesized onto graphite fibers by molten salts method to improve the interfacial bonding and thermal properties of short graphite fiber/Al composites which were fabricated by vacuum pressure infiltration technique. The graphite fiber/Al composites with different thicknesses of chromium carbide coatings were prepared through varying plating times to investigate the influence of chromium carbide layer on the microstructures and thermal properties of the composites. The combined Maxwell-Garnett effective medium approach and acoustic mismatch model schemes were used to theoretically predict thermal conductivities of the composites. The results indicated that the chromium carbide coating formed on graphite fiber surface in molten salts consists mainly of the Cr 7 C 3 phase. The Cr 7 C 3 -coating layer with plating time of 60 min and thickness of 0.5 lm was found to be most effective in improving the interfacial bonding and decreasing the interfacial thermal resistance between graphite fiber and aluminum matrix. The 40 vol% Cr 7 C 3 -coated graphite fiber/Al composite with Cr 7 C 3 thickness of 0.5 lm exhibited 45.4 % enhancement in inplane thermal conductivity of 221 W m -1 K -1 compared to that of uncoated composite, as well as the coefficient of thermal expansion of 9.4 9 10 -6 K -1 , which made it as very interesting material for thermal management applications.

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“…Thermal stresses are important in design because they lead to plastic yielding or failure of the material [12] . There are several mechanisms by which thermal stresses can be relaxed, which include interface debonding, by micro plasticity of the metal matrix and crack initiation and propagation [13] . AMCs are frequently being exposed to environments where cyclic temperature changes prevail [10] .…”

Section: Introductionmentioning

confidence: 99%

The behaviour of aluminium matrix composites under thermal stresses

Dash

Sukumaran

Ray

2014

Science and Engineering of Composite Materials

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The present review work elaborates the behaviour of aluminium matrix composites (AMCs) under various kinds of thermal stresses. AMCs find a number of applications such as automobile brake systems, cryostats, microprocessor lids, space structures, rocket turbine housing, and fan exit guide vanes in gas turbine engines. These applications require operation at varying temperature conditions ranging from high to cryogenic temperatures. The main objective of this paper was to understand the behaviour of AMCs during thermal cycling, under induced thermal stresses and thermal fatigue. It also focuses on the various thermal properties of AMCs such as thermal conductivity and coefficient of thermal expansion (CTE). CTE mismatch between the reinforcement phase and the aluminium matrix results in the generation of residual thermal stress by virtue of fabrication. These thermal stresses increase with increasing volume fraction of the reinforcement and decrease with increasing interparticle spacing. Thermal cycling enhances plasticity at the interface, resulting in deformation at stresses much lower than their yield stress. Low and stable CTE can be achieved by increasing the volume fraction of the reinforcement. The thermal fatigue resistance of AMC can be increased by increasing the reinforcement volume fraction and decreasing the particle size. The thermal conductivity of AMCs decreases with increase in reinforcement volume fraction and porosity.

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Thermal conductivity of diamond particle dispersed aluminum matrix composites fabricated in solid–liquid co-existent state by SPS

Cited by 70 publications

References 28 publications

Influence of residual thermal stresses on fatigue crack growth life of discontinuous reinforcements in metal matrix composites

Influence of residual thermal stresses on fatigue crack growth life of discontinuous reinforcements in metal matrix composites

Effect of chromium carbide coating on thermal properties of short graphite fiber/Al composites

The behaviour of aluminium matrix composites under thermal stresses

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