Functionally graded WC–Co materials produced by electrophoretic deposition

Put, Stijn; Zhang, Fei; Biest, Omer Van der

doi:10.1016/s1359-6462(01)01126-5

Cited by 71 publications

(28 citation statements)

References 12 publications

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“…Figure 8 maps the averages of the Co contents derived from the indentations carried out on the two sides of the interface for the 24 assemblies of the type L15-S6, L15-S15, L6-S6, and S15-L6, which associate cermet grades with different particle sizes. The results for the assemblies of the type S15-S6 and L15-L6 are not presented because thermodynamic equilibrium brings about the homogenization of the Co content throughout these assemblies [7,18] (image analysis did not show evidence of a significant difference of the grain sizes on the two sides after heat treatment). The dash-dotted line in Figure 8 represents equal Co contents on the two sides.…”

Section: Resultsmentioning

confidence: 99%

Equilibrium Distribution of Liquid during Sintering of Assemblies of WC/Co Cermets

Colin

Guipont

Delannay

2007

Metall Mater Trans A

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Assemblies were made by stacking on top of one another two cylinders of WC-Co cermets differing in mean WC particle size (relative size ratio of 3.5) and cobalt concentration (6 or 15 wt pct). These assemblies were bonded by heat treatment at 1400°C under protective atmosphere for a dwell time of 7 hours. After completion of the heat treatment, the distributions of the cobalt concentration and WC grain size as a function of distance from the original interface between the two cermets were analyzed by combining Vickers microhardness measurements and image analysis. At equilibrium, the Co content was always larger on the side containing the smaller WC particle size. The final partition of Co was compared with the predictions of a model developed for expressing the dependence of the solid/solid and solid/liquid interface areas on the system parameters: phase volume fractions, dihedral angle, particle size, and particle coordination. An excellent agreement is found when assuming an average WC coordination of 7.

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Section: Resultsmentioning

confidence: 99%

Equilibrium Distribution of Liquid during Sintering of Assemblies of WC/Co Cermets

Colin

Guipont

Delannay

2007

Metall Mater Trans A

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“…In the simplest case an external mixing system supplies suspensions with the variable concentrations of the components or the second component is added with time in calculated proportions [64][65][66][67]. The feasibility to produce a graded green body from homogeneous suspensions using the difference in the electrophoretic mobility of different powders was investigated in the course of a priority program project [68].…”

Section: Electrophoretic Depositionmentioning

confidence: 99%

Processing techniques for functionally graded materials

Kieback

Neubrand

Riedel

2003

Materials Science and Engineering: A

804

333

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“…[22][23][24][25] An advantage compared to other shaping methods such as slip casting or centrifugal casting is the independence of particle velocity from its size. 26 It was successfully applied to fabricate coatings, 27,28 functionally graded materials, 29,30 composite structures 31 and compacts of nanotubes. 32 However, organic suspensions were used and special precautions had to be taken.…”

Section: Introductionmentioning

confidence: 99%