Ursachen und Wirkungen der Konzentration

Lenel, Hans O

doi:10.1007/bf01322886

Cited by 1 publication

(2 citation statements)

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“…During this stage the melt spreads and penetrates into the solid matrix, accompanied by particle sliding, alloying element homogenization, fragmentation etc. The first theoretical understanding of the rearrangement process was studied by Lenel et al [1,2] and the mathematical description of the process was given by Kingery [3] and Eremenko et al [4].…”

Section: Introductionmentioning

confidence: 99%

“…According to the heavy alloy mechanism [1] the rearrangement stage during LPS is considered as a densification step, if the following conditions required for the significant rearrangement densification are fulfilled; 1. low contact angle, 2. small dihedral angle, 3. loose powder structure, 4. weak solid-state interparticle bonding, 5. solubility of the solid in the liquid. Otherwise, the rearrangement of the solid particles after melt formation might result in the swelling of a compact.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of the primary rearrangement stage of liquid phase sintering

Tahir¹,

Malik²,

Amberg³

2016

Modelling Simul. Mater. Sci. Eng.

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The dimensional variations during the rearrangement stage of liquid phase sintering could have a detrimental effect on the dimensional tolerances of the sintered product. A numerical approach to model the liquid phase penetration into interparticle boundaries and the accompanied dimensional variations during the primary rearrangement stage of liquid phase sintering is presented. The coupled system of the Cahn–Hilliard and the Navier–Stokes equations is used to model the penetration of the liquid phase, whereas the rearrangement of the solid particles due to capillary forces is modeled using the equilibrium equation for a linear elastic material. The simulations are performed using realistic physical properties of the phases involved and the effect of green density, wettability and amount of liquid phase is also incorporated in the model. In the first step, the kinetics of the liquid phase penetration and the rearrangement of solid particles connected by a liquid bridge is modeled. The predicted and the calculated (analytical) results are compared in order to validate the numerical model. The numerical model is then extended to simulate the dimensional changes during primary rearrangement stage and a qualitative match with the published experimental data is achieved.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%