A method of measuring metal infiltration rates in porous preforms at high temperature

Muscat, Daniel; Drew, R. A. L.

doi:10.1007/bf00627015

Cited by 11 publications

(7 citation statements)

References 8 publications

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“…For example, a sample with a thickness of 20 mm would be fully infiltrated in less than a minute. Such infiltration rates are comparable to those noted by Muscat and co-workers 12,13 for aluminum that has infiltrated into TiC but are significantly more rapid than those observed experimentally in the current study (i.e., a sample with a thickness of 20 mm would be infiltrated in ϳ60 min, based on extrapolation of the experimental data in Fig. 3).…”

Section: (1) Preform Characterization and Infiltration Kineticssupporting

confidence: 91%

“…The melting temperature of the IC-50 alloy was ϳ1305°Ϯ 5°C, which will be reduced slightly by TiC dissolution during composite synthesis. Melt infiltration of a porous preform often is described by the Washburn equation, 11,12 which relates the depth of infiltration (l) with time (t):…”

Section: (1) Preform Characterization and Infiltration Kineticsmentioning

confidence: 99%

“…10 For wetting systems, where the contact angle of the molten metal on the ceramic is Ͻ90°, capillary pressure provides the driving force for infiltration. 11,12 Under these conditions, infiltration can be extremely rapid and often is described as "spontaneous." 7 Infiltration rates have been studied for several "model" metal-ceramic systems, including aluminum into TiC 12,13 and AlN 5 and the infiltration of Al 2 O 3 by Cu(O) alloys.…”

Section: Introductionmentioning

confidence: 99%

“…11,12 Under these conditions, infiltration can be extremely rapid and often is described as "spontaneous." 7 Infiltration rates have been studied for several "model" metal-ceramic systems, including aluminum into TiC 12,13 and AlN 5 and the infiltration of Al 2 O 3 by Cu(O) alloys. 7,14 Typically, parabolic infiltration kinetics are observed in these and other systems, 7,12,13 in accordance with theoretical analyses.…”

Section: Introductionmentioning

confidence: 99%

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Processing and Microstructure Development of Titanium Carbide–Nickel Aluminide Composites Prepared by Melt Infiltration/Sintering (MIS)

Plucknett

Becher

2001

Journal of the American Ceramic Society

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A combined melt-infiltration/sintering (MIS) route has been described for the preparation of composites that are based on titanium carbide (TiC) with a ductile nickel aluminide (Ni 3 Al) "binder" phase. This approach allows control of the Ni 3 Al content, which can be varied readily in the range of 4 -25 vol%. Densities of >98% of the theoretical density have been obtained for composites that have been prepared with Ni 3 Al contents of >8 vol%. Preliminary examination indicates that the infiltration kinetics approximate to parabolic at 1300°C. Compositional analysis of the densified materials indicates only minimal titanium dissolution into the Ni 3 Al alloy (<6 at.%), with an analyzed carbide composition of TiC 0.93 . Cubic grain-growth kinetics are observed for TiC-16-vol% Ni 3 Al, with an activation energy of ϳ400 ؎ 60 kJ/mol.

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Section: (1) Preform Characterization and Infiltration Kineticssupporting

confidence: 91%

Section: (1) Preform Characterization and Infiltration Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Processing and Microstructure Development of Titanium Carbide–Nickel Aluminide Composites Prepared by Melt Infiltration/Sintering (MIS)

Plucknett

Becher

2001

Journal of the American Ceramic Society

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“…The feasibility of sintering the TiC preforms was directly related to the fine particle size of the TiC powders. [8,9] Infiltration kinetics and thermodynamic aspects: Figure 3a shows the infiltration profiles obtained for the Al-Cu x binary alloys at 1000 C. The infiltration rate of Al-Cu x increased with decreasing copper content. A similar behavior was observed at 900 C. This behavior is mainly due to the increased viscosity of the melt with copper additions, which in turn decreased the fluidity of the alloy through the capillaries.…”

mentioning

confidence: 99%

Processing and Characterization of Al‐Cu and Al‐Mg Base Composites Reinforced with TiC

Contreras¹,

Albiter²,

Bedolla³

et al. 2004

Adv Eng Mater

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elements will contain diamond cutting plates since preliminary studies carried out at MTU Aero Engines proofed that this material shows practically no attrition when cutting the fibers.Laser cutting does not lead to a proper cutting surface. This process is therefore not suitable for further application. Together with laser cutting a so called ªonion-structureº was observed on the pyrolithic carbon coating of SiC fibers, which leads additionally to a fiber destruction at the interface SiC to Titanium coating. Two possible explanations can be given for this effect. Either it is due to a reaction between the Titanium 6±4 and the pyrolithic graphite layer or due to the destruction of bonds between the atomic layers of graphite as a result of heat influence.Conclusions: This paper described different cutting methods for SiC fibers (bending, scissors cutting and laser cutting) and evaluated the results. The laser cutting method is not suitable due to the change in fiber morphology at the cut surfaces and the destruction of the pyrolithic graphite interlayer. Scissors cutting of fibers is problematic as well. The two scissor blades penetrate the fiber and generate a complex stress field, which may lead to chip fractures with undesirable particle contamination. According to the evaluated results cutting by bending is the best method. The fracture is plane and perpendicular to the fiber axis, producing a smooth fracture surface at a predictable location without particles. ExperimentalUncoated and coated SiC fibers were cut by a CO 2 laser. The laser RS500/ 700 was supplied by ROFIN-SINAR Hamburg, Germany.For cutting two plates on which the fibers were fixed with adhesive tapes were prepared. These plates were separated by a distance of 2,5 cm. At the point equidistant from both plates, the laser cut into the fibers.The laser used had a focal distance of 1000 lm. Since the diameter of the fibers is about 140 lm and due to the fact that the laser lens focus could be moved only in steps of 100 lm, a distance of the fiber surface to the laser lens of 900 lm was selected. This way the focus of the laser was about 40 lm within the fiber itself. Laser power was increased in steps of 10 W starting at 0 W and ending at 260 W or 290 W for the coated and uncoated SiC fibers respectively.All of the presented electron microscope scans were obtained by means of an SEM CamScan S2, Cambridge, UK equipped with an energy dispersive microanalyser (EDX, Edwin M-series, Röntec, Berlin, Germany).The cutting depths of the coated and uncoated SiC fibers were determined by means of MS Picture Publisher .Metal matrix composites (MMCs) reinforced with ceramic particles offer high strength and high values of the elastic modulus as well as good high-temperature properties compared to the corresponding monolithic materials used as the matrix. [1] The nature of the technique used in the fabrication of MMCs has a significant effect on the overall properties of the product. In the case of the liquid-metal processing of composites, a major difficulty fo...

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Ex Situ Production Routes for Metal Matrix Nanocomposites

Ceschini

Dahle

Gupta

et al. 2016

Engineering Materials

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A method of measuring metal infiltration rates in porous preforms at high temperature

Cited by 11 publications

References 8 publications

Processing and Microstructure Development of Titanium Carbide–Nickel Aluminide Composites Prepared by Melt Infiltration/Sintering (MIS)

Processing and Microstructure Development of Titanium Carbide–Nickel Aluminide Composites Prepared by Melt Infiltration/Sintering (MIS)

Processing and Characterization of Al‐Cu and Al‐Mg Base Composites Reinforced with TiC

Ex Situ Production Routes for Metal Matrix Nanocomposites

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