Pressure infiltration of packed ceramic particulates by liquid metals

García‐Cordovilla, C.; Louis, E.; Narciso, J.

doi:10.1016/s1359-6454(99)00318-3

Cited by 179 publications

(112 citation statements)

References 51 publications

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“…508), several factors impede spontaneous infiltration; these include the roughness of the lamellae (Trumble 1998) and the presence of an oxide layer on the metal surface. Consequently, an additional pressure, which is inversely proportional to the pore size (Garcia-Cordovilla et al 1999), is required to break the oxide layer and promote infiltration. At present, our experimental set-up cannot reach the pressures needed to infiltrate the finer microstructures.…”

Section: Microstructurementioning

confidence: 99%

A novel biomimetic approach to the design of high-performance ceramic–metal composites

Launey

Munch

Alsem

et al. 2009

J. R. Soc. Interface.

249

121

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The prospect of extending natural biological design to develop new synthetic ceramicmetal composite materials is examined. Using ice-templating of ceramic suspensions and subsequent metal infiltration, we demonstrate that the concept of ordered hierarchical design can be applied to create fine-scale laminated ceramic -metal (bulk) composites that are inexpensive, lightweight and display exceptional damage-tolerance properties. Specifically, Al 2 O 3 /Al -Si laminates with ceramic contents up to approximately 40 vol% and with lamellae thicknesses down to 10 mm were processed and characterized. These structures achieve an excellent fracture toughness of 40 MPa p m at a tensile strength of approximately 300 MPa. Salient toughening mechanisms are described together with further toughening strategies.

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Section: Microstructurementioning

confidence: 99%

A novel biomimetic approach to the design of high-performance ceramic–metal composites

Launey

Munch

Alsem

et al. 2009

J. R. Soc. Interface.

249

121

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“…Activation by Ti has been successfully used for the manufacturing of Al 2 O 3 -X3CrNiMo13-4 MMC, [4][5][6][7] but textural observations and the linear infiltration kinetics observed in preliminary experiments are difficult to explain with the formation of reaction layer or the lowering of surface tension. [8][9][10][11][12][13][14][15] Two types of experiments were, therefore, set up to elucidate the infiltration mechanisms in the alumina -steel system. A series of experiments was conducted with a model pore consisting of two juxtaposed parallel alumina plates separated by spacers.…”

mentioning

confidence: 99%

Experimental Models for Activtation Mechanism of Pressureless Infiltration in the Non‐Wetting Steel‐Alumina MMC System

et al. 2008

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Common activation mechanisms, which are responsible for infiltration in other non‐wetting systems, play only a secondary role in the Ti activated Al2O3/X3CrNiMo13‐4 system for pressureless alloy infiltration into porous ceramic preforms. Experiments with a model pore consisting of two juxtaposed parallel alumina plates with lithographically imprinted arrays of Ti‐dots show that transport through the vapour phase and subsequent condensation of the steel components onto the activator are the key steps of the activation mechanism. The mechanism was additionally confirmed by infiltration experiments with porous alumina preforms consisting of alternating layers with and without Ti parallel to the infiltration direction. Only layers with activator particles were infiltrated.

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“…The composites were processed by gas-driven pressure infiltration; details can be found in [46][47][48][49][50]. The method allows to process ''model'' composites that are free of processing defects such as oxide inclusions, uncontrolled interfacial reaction products, or nonuniformly distributed particles (''clustering'').…”

Section: Materials Processing and Designationmentioning

confidence: 99%

Fracture of aluminium reinforced with densely packed ceramic particles: link between the local and the total work of fracture

Miserez

2004

Acta Materialia

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Model composites of pure Al reinforced with 50% ceramic particles are produced by infiltration. The composite fracture energy is measured by J -integral testing. Marked R-curve behaviour is found. The J-R curves exhibit a break in their slope at a well-defined point. This point is shown to denote the onset of macroscopic crack propagation and is used to assess the composite toughness.Toughness reaches values as high as 40 MPa ffiffiffiffi m p . Quantitative metallography and stereoscopic reconstructions of fracture surfaces are used to estimate the local work of fracture in the process zone. The measured (total) fracture energy is about ten times the estimated local fracture energy, for all composites. The main contribution to their total fracture energy is thus from plastic dissipation around the crack-tip; however, the toughness is still dictated by the local fracture energy. This study hence experimentally substantiates the ''valve'' concept in fracture mechanics.

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Pressure infiltration of packed ceramic particulates by liquid metals

Cited by 179 publications

References 51 publications

A novel biomimetic approach to the design of high-performance ceramic–metal composites

A novel biomimetic approach to the design of high-performance ceramic–metal composites

Experimental Models for Activtation Mechanism of Pressureless Infiltration in the Non‐Wetting Steel‐Alumina MMC System

Fracture of aluminium reinforced with densely packed ceramic particles: link between the local and the total work of fracture

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