Discrete element simulation of metal ceramic composite materials with varying metal content

Metal-ceramic composite materials are used in several fields of industrial applications. Most of the composites are particulate composites, where metal is the matrix and ceramic the reinforcing particulate material. Oxide dispersion strengthened alloys show increased temperature stability compared to the pure alloy. Theoretical models describing the densification evolution during sintering are only available for particle reinforced materials, but there are no models developed for interpenetrating structures, when both phases are sintering.We present a modelling approach based on the discrete element method, which can be used to investigate the sintering behavior on the whole range of powder metallurgical producible composites. The discrete element method takes the particulate structure of the powder compact into account and allows one to perform detailed modelling of each contact separately. In this paper the metal fraction was varied between 100 and 0 vol.% and the densification was analyzed by the contact radius evolution.

Subjects

Alumina

Composites

Discrete element method (DEM)

Metal/ceramic

Sintering

DDC Class

600: Technik

More Funding Information

Financial support from the German Research Foundation (DFG) via SFB 986 “M3”, project C5, financial support from the “Zentrales Innovationsprogramm Mittelstand (ZIM)”, PIM3C. grant no.: KF2167002US1, as well as CNPq/Capes within the program “Ciencia sem Fronteiras” Edital 61/2011, Project “Powder Metallugical Synthesis of Metals and Ceramics”.

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Discrete element simulation of metal ceramic composite materials with varying metal content