Processing and microstructure of metal matrix composites prepared by pressureless Ti-activated infiltration using Fe-base and Ni-base alloys

Lemster, K.; Graule, Thomas; Kuebler, Jakob

doi:10.1016/j.msea.2004.10.025

Cited by 47 publications

(34 citation statements)

References 18 publications

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“…[1][2][3][4] MMC's made of Al 2 O 3 (alumina) and high melting Fe-base alloys (e.g., X3CrNiMo13-4) meet the requirements for certain application in food, pharmaceutical and automotive industry. [5] A formfree and advantageous way to produce MMC's is the infiltration of porous ceramic performs by metal melts. Problems arise for metalic melts that do not wet the ceramic substrate.…”

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confidence: 99%

“…In systems studied so far, such as SiC and AlN preforms infiltrated by bronze and Fe-base alloys, the enhancement of the wettability is due either to the formation of a wettable layer through the reaction of the activator with the ceramic substrate or to the lowering of the surface tension of the melt. 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.…”

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

et al. 2008

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“…[15] With the apparatus being made of steel, the squeeze infiltration is normally carried out at temperatures lower than the melting point of steel, while the gas pressure infiltration process normally requires a highly sealed container. [16] Moreover, both methods take relatively long time and may not be practical in many cases where the molten metals are highly reactive with the ceramic preforms.…”

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confidence: 99%

Current-Activated, Pressure-Assisted Infiltration: A Novel, Versatile Route for Producing Interpenetrating Ceramic–Metal Composites

Kothalkar

O'Neil

et al. 2014

Materials Research Letters

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A novel technique is proposed and demonstrated for processing interpenetrating ceramic-metal composites by the infiltration of molten metals/alloys into ceramic foams utilizing a current-activated, pressure-assisted technique. Ti 2 AlC foams were prepared and used as the infiltration preform. Aluminum alloy 6061 (AA6061) has been infiltrated into the Ti 2 AlC foams, resulting in AA6061/Ti 2 AlC composites. The microstructure, composition, and distribution of phases in the composites were studied. The AA6061/Ti 2 AlC composites were studied under compression testing, and the results were compared with those of the pure components of the composites. Advantages of this method in comparison to other methods for processing metal-ceramic composites are discussed.

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“…Furthermore, wear resistant MMCs are very interesting for machine parts in pharmaceutical and food industry applications since contamination is reduced due to higher wear resistance. In the past, wear resistant alumina particle/steel (Al 2 O 3 /X38CrMoV5-1)-MMCs have already been produced by pressureless titanium-activated melt infiltration [1,2]. The current work deals with the in-situ fabrication of three-dimensional interconnected Al 2 O 3 /steel-MMCs.…”

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confidence: 99%

Mechanical properties of three-dimensional interconnected alumina/steel metal matrix composites

et al. 2009

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Three-dimensional interconnected alumina/ steel metal matrix composites (MMCs) were produced by pressureless Ti-activated melt infiltration method using three types of Al 2 O 3 powder with different sizes and shapes. By partial sintering during infiltration an interpenetrating ceramic network was realised. The effect of the ceramic particle size and shape on the resulting ceramic network, volume % fraction and the MMC properties is presented. The MMCs were characterised for mechanical properties at room temperature and elevated temperature. An increase in flexural strength and Young's modulus with decreasing particle size has been observed. In addition, the effect of the volume of ceramic content and the surface finish of the MMCs on the wear behaviour is shown.

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Processing and microstructure of metal matrix composites prepared by pressureless Ti-activated infiltration using Fe-base and Ni-base alloys

Cited by 47 publications

References 18 publications

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

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

Current-Activated, Pressure-Assisted Infiltration: A Novel, Versatile Route for Producing Interpenetrating Ceramic–Metal Composites

Mechanical properties of three-dimensional interconnected alumina/steel metal matrix composites

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