Cristian Daniel GHELSINGHER, Dalia SIMION, Sorin Vasile SAVU, Iulian ȘTEFAN, Andrej DAVID, Ionel Dănuț SAVU


The present paper proposes the realization of some researches related to microwave heating of composite material based on Fe97.5%Gr0.5%Cu2% reinforced with natural ceramic Rapana Thomasiana powders for improvement of preheating conditions of composites that are subject to welding. The study has been focused on microwave heating mechanism for low power injection during sintering process of composite material in order to obtain economic efficiency of the process in terms of sintering time, energy saving and low carbon footprint. The results showed that, for 10% of Rapana Thomasiana in chemical composition of the samples, the thermal treatment process is feasible for microwave heating. The targeted temperatures were 350 oC and 950 oC and these values were reached after 75 s and 700 s.  In addition, the process proved to be very cheap in terms of staff costs and energy consumption.

Full Text:



Young M.C., Chan S.L.I., Tsay L.W., Shin C.-S., Hydrogen-enhanced cracking of 2205 duplex stainless steel welds, Materials Chemistry and Physics, 2005, pp. 21-27

Padhy G.K., Ramasubbu V., Murugesan N., Remash C., Albert S.K., Effect of preheat and post-heating on diffusible hydrogen content of welds, Science and Technology of Welding and Joining, 2012, pp. 408-413

Yurioka N., Comparison of Preheat Predictive Methods, Welding in the World, 2004, pp. 21-27.

Chakraborty G., Rejeesh R., Zubairuddin M., Albert S.K., Effect of preheating and post heating in reducing diffusible hydrogen content and hydrogen assisted cracking susceptibility of modified 9Cr–1Mo steel, Science and Technology of Welding and Joining, 2020, pp. 637-643

Gupta M., Leong W.W., Microwaves and Metals, Jon Wiley & Sons, 2007

Yoshikawa N., Fundamentals and applications of microwave heating of metals, Journal of Microwave Power Electromagnetic Energy, 2010, pp. 4-13

Sun J., Wang W., Yue Q., Review on Microwave-Matter Interaction Fundamentals and Efficient Microwave-Associated Heating Strategies, Materials, 2016, pp. 231

Colombini E., Papalia K., Barozzi S., Perugi F., Veronesi P., A Novel Microwave and Induction Heating Applicator for Metal Making: Design and Testing, Metals, 2020, pp. 676

Ano T., Tsubaki S., Fujii S., Wada Y., Designing Local Microwave Heating of Metal Nanoparticles/Metal Oxide Substrate Composites, J. Phys. Chem. C, 2021, pp. 23720-23728

Tarnita D., Tarnita D.N., Bizdoaca N., Tarnita C., Berceanu C., Boborelu C., Modular adaptive bone plate for humerus bone osteosynthesis, Romanian Journal of Morphology and embryology, 2009, pp. 447-452

Tarnita D., Tarnita D.N, Bolcu, D., Orthopedic modular implants based on shape memory alloys, chapter in Biomedical Engineering – From Theory to Applications, pp.431-468, InTech Publishing House, Viena, 2011.

Savu S.V., Tarnita D., Benga G.C., Dumitru I., Stefan I., Craciunoiu N., Olei A.B., Savu I.D., Microwave Technology Using Low Energy Concentrated Beam for Processing of Solid Waste Materials from Rapana thomasiana Seashells, Energies, pp. 6780, 2021,

Savu I.D., Tarnita D., Savu S.V., Benga G.C., Cursaru L.M., Dragut D.V., Piticescu R.M., Tarnita D.N., Composite Polymer for Hybrid Activity Protective Panel in Microwave Generation of Composite Polytetrafluoroethylene ‐ Rapana Thomasiana, Polymers, pp. 2432, 2021.

Tarnita D., Berceanu C., Tarnita C., The three-dimensional printing – a modern technology used for biomedical prototypes, Materiale Plastice, 2010, pp. 328-334

Tarnita D., Tarnita D.N., Popa D., Grecu D., Niculescu D., Numerical simulations of hu-man tibia osteosynthesis using modular plates based on Nitinol staples, Romanian Journal of Morphology and embryology, 2010, pp. 145-150

Mangra G. I., Savu, S. V., Savu, I. D., Inductive Sensor with Sintered Magnetic Core to Evaluate the Performances of the Table Tennis Players, Materials Science Forum, 2011, pp. 105-108

Ştefan I., Savu S. V., Ghermec O., Nicolicescu C., Trotea M., Researches regarding elaboration of barium hexaferrite from microwave heating, Solid State Phenomena, 2012, pp. 369-375

Savu I.D., Savu S.V., Benga G. C., Thermal Runaway of the BaCO3 + Fe2O3 homogenous mixture and mechanical alloys at the microwave heating, Advanced Materials Research, 2014, pp. 185-189

Savu S.V., Marin R.C., David A., Olei A.B., Dumitru I., Tarnita D., Maternova A., Savu I.D., Reducing the NOx emissions through microwave heating of aftertreatment systems for sustainable transport in inland waterway sector, Sustainability, 2022, pp. 4156


  • There are currently no refbacks.