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- W2188826072 abstract "The paper presents discrete element simulation of manufacturing of metal matrix composites using a powder metallurgy process. Powder metallurgy is the most common technique to fabricate metal matrix composites with ceramic reinforcement, advanced materials with many applications. As a technological process powder metallurgy consists of several stages including metal and ceramic powder manufacturing, preparation of metal-ceramic powder mixture, powder pressing and sintering. Sintering consists in consolidation of loose or weakly bonded powders at elevated temperatures, close to the melting temperature with or without additional pressure. This is a complex process affected by many factors. Modelling can be used to optimize and to understand better the sintering process and improve the quality of sintered components. One of the main problems in sintering of metal-ceramic composite is possibility of crack initiation in the material due to difference in shrink age of metal and ceramic phases. Modelling of sintering process is still a challenging resea rch task. There are different approaches in modelling of sintering processes, ranging from continuum phenomenological models to micromechanical and atomistic ones. In this work the discrete element method is adopted as a modelling tool. In the discrete element method, material is represented as a large collection of particles interacting with one another by contact forces. It is a suitable tool to model granular and rock materials [1]. Modelling of sintering requires introduction of the cohesive interac tion among particles representing inter-particle sintering forces. Following [?, 2] the discrete element model adopted in this work employs the following equation for the sintering interaction between powder grains:" @default.
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- W2188826072 date "2012-01-01" @default.
- W2188826072 modified "2023-09-27" @default.
- W2188826072 title "Discrete element simulation of powder metallurgy manufacturing process of metal-ceramic composites" @default.
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