Flash (ultra-rapid) sintering is a new sintering approach allowing sintering in mere seconds. This project addresses the main inherent heating instabilities, microstructural inhomogeneity and regulation issues of this abrupt process. Flash sintering will be applied to advance sintering techniques such as spark plasma sintering (SPS) and microwave sintering. The main goal is to combine pulsed electrical current or microwave irradiation and/or high pressure to decrease the flash sintering temperature and attain a better control of this process and the sintered microstructures. The multiphysics simulation/modeling will be investigated, on the one hand, for the understanding of all coupled physical parameters, and on the other hand, for the study of the underlying flash sintering mechanisms.
This project strategy is based on five tasks organized in a certain order to reach the project objectives. The first task consists of the establishment of the multiphysics numerical tool which needs to be adapted to the ultra-rapid sintering conditions. Then, this numerical tool will be employed for the determination of the favorable ultra-rapid sintering experimental conditions, the regulation of this abrupt process, and the homogeneity of the physical fields for the scaling up of this process. The last task is dedicated to the fundamental sintering aspect of ultra-rapid sintering and its modeling. This task will be developed along with the others.
The ambition of this project is the establishment of stable and reproducible experimental conditions for the ultra-rapid sintering of metals to dielectric parts (up to 30 mm); each developed sintering process will come with a comprehensive multiphysics model which encompasses all the main physical phenomena.
Monsieur charles manière (Laboratoire de cristallographie et sciences des matériaux)
The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.
CRISMAT Laboratoire de cristallographie et sciences des matériaux
Help of the ANR 196,862 euros
Beginning and duration of the scientific project: February 2020 - 30 Months