Innovative eco-friendly process for producing WC-Co type compacts for cutting tools
PostDoctoral Researcher
Mentor
PostDoctoral
Research scholarship within “Entrepreneurial skills and research excellence in doctoral and
postdoctoral programs ANTREDOC”
Project code: POCU / 380/6/13/123927.
Project co-financed by the European Social Fund through the Operational Program Human Capital 2014-2020
Beneficiary: Technical University of Cluj-Napoca
Partner: ROBERT BOSCH SRL
Project code: POCU / 380/6/13/123927.
Project co-financed by the European Social Fund through the Operational Program Human Capital 2014-2020
Beneficiary: Technical University of Cluj-Napoca
Partner: ROBERT BOSCH SRL
The aim of this project is to use an alternative eco friendly milling environment for the development of Eco technologies for the production of advanced materials used in the field of cutting tools. To achieve this goal, water will be used as a milling medium. The use of an aqueous milling medium would cancel out the disadvantages of using organic media. The implementation of such a milling medium involves certain challenges, such as the oxidation of constituents during milling.
Taking into account the above, the proposed research project falls within the field of intelligent specialisation ECO-NANO-TECHNOLOGIES AND ADVANCED MATERIALS according to SNCDI. The optimisation of such a technology represents an applied research topic in the field of materials engineering.
Taking into account the above, the proposed research project falls within the field of intelligent specialisation ECO-NANO-TECHNOLOGIES AND ADVANCED MATERIALS according to SNCDI. The optimisation of such a technology represents an applied research topic in the field of materials engineering.
Objectives:
1. Prevention of powder oxidation by reducing the content of dissolved gases in the milling medium, without the introduction of corrosion inhibitors. The traditional method of preventing powder oxidation is by introducing surfactants.
2. Controlling the particle agglomeration mechanism, by modifying the drying parameters. Currently, the dispersion of sub-micron particles is accomplished industrially by introducing suspended polymers to achieve particle dispersion. The development of a technology based on the modification of the pH of the suspension taking into account the possibility of reaching a zero Zeta potential in the case of WC Co / water suspensions is another novelty of this project.
2. Controlling the particle agglomeration mechanism, by modifying the drying parameters. Currently, the dispersion of sub-micron particles is accomplished industrially by introducing suspended polymers to achieve particle dispersion. The development of a technology based on the modification of the pH of the suspension taking into account the possibility of reaching a zero Zeta potential in the case of WC Co / water suspensions is another novelty of this project.
Expected results:
– method of milling (parameters) in aqueous medium of WC Co powders;
– WC Co powders with reduced oxidation degree;
– compacts sintered from powders milled in aqueous medium situated in the biphasic region (WC + Co);
– published scientific papers.
– WC Co powders with reduced oxidation degree;
– compacts sintered from powders milled in aqueous medium situated in the biphasic region (WC + Co);
– published scientific papers.
The results of this study were the subject of several articles published in ISI journals:
1. H.F. Chicinaș, D.O. Jucan, Gădălean, R.V., G. Conțiu, T.F. Marinca, P. Götze, A. Eckert, C.O. Popa, Influence of milling media on the properties of some hard metal powders, International Journal of Refractory Metals and Hard Materials 96 (2021), 105470.
2. O. Jucan, Gădălean, R.V., H.F. Chicinaș, M. Hering, N. Bâlc, C.O. Popa, Study on the indirect selective laser sintering (SLS) of WC-Co/PA12 powders for the manufacturing of cemented carbide parts, International Journal of Refractory Metals and Hard Materials 96 (2021), 105498
Date contract begin: July 15th, 2020
Scholarship duration: 12 months
Contact:
horea.chicinas@stm.utcluj.ro
Department of Materials Science and Engineering
Technical University of Cluj-Napoca
103-105 Muncii Avenue 400641 Cluj-Napoca
Tel: +40 728 868 016
Scholarship duration: 12 months
Contact:
horea.chicinas@stm.utcluj.ro
Department of Materials Science and Engineering
Technical University of Cluj-Napoca
103-105 Muncii Avenue 400641 Cluj-Napoca
Tel: +40 728 868 016