Microwave processing, characterization and modeling of metal powder compacts

• Antragsteller: Professor Dr. Manfred Thumm
• Fachliche Zuordnung: Elektronische Halbleiter, Bauelemente und Schaltungen, Integrierte Systeme, Sensorik, Theoretische Elektrotechnik
• Förderung: Förderung von 2010 bis 2014
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 166159772

The main goal of this project is to carry out a systematic study and the detailed experimental investigations on sintering behaviors of metal powders commonly used for the production of improve machine components. The systematic approach to study different aspects of the microwave sintering phenomenon would be achieved by dividing the overall field into three parts, namely, the modeling, the characterization and the processing. First of all, a number of samples made of commonly used metal powder compacts with different green densities will be prepared by uni-axial pressing. The modeling would involve the realization of these powder compacts as specialized composites, and computing the effective dielectric and magnetic properties of these samples in terms of the volume ratio and the material properties of each constituent. For the characterization, the scattering coefficients of each sample will be measured in order to determine the effective electromagnetic properties of these samples, which would then be compared with their theoretical values. On the processing front, the sintering of most of the samples would be performed in a gyrotron based high power microwave system. It is planned to carry out online measurements of temperature distribution and the DC conductivity during the sintering process of these samples by varying their composition and the green density, and comparing the results with the conventional methods. These investigations will be analyzed in detail with the help of SEM, EDX and the optical microscopy in order to fully understand the observed effects.

• DFG-Verfahren: Sachbeihilfen
• Internationaler Bezug: Indien
• Partnerorganisation: Department of Science and Technology (DST)
• Beteiligte Person: Dr.-Ing. M. Jaleel Akhtar