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Investigation of new Additive Manufacturing DED application for waste-to-hydrogen conversion
1  Center of Competence “Intelligent Mechatronic, Eco- and Energy-Saving Systems and Technologies”, Technical University Sofia, branch Plovdiv, 4000 Plovdiv, Bulgaria.
Academic Editor: Detlef Bahnemann

Abstract:

Relatively low-cost Titanium Carbide (TiC) materials and Metal Matrix Composites (MMC) are proposed for waste-to-hydrogen conversion. Two type of steels are used as bases prepared from EN 10088 flat products, namely X2CrTi12 (1.4512, AISI 409) and X5CrNi18-10 (1.4301, AISI 304). TiC is mixed with TRIBALOY® T-800 alloy in powder form and applied via Laser Directed Energy Deposition (DED-LB) over the substrates. For the powder mixture, Fourier transform infrared spectroscopy (FT-IR) and Differential Scanning Calorimety (DSC) are performed. The raw materials are investigated for the processes that occur in them under heating. After the solidification of the molten mixture, grinding and polishing are performed to achieve a thin layer. The studies of the obtained MMC include interface zones assessment, hardness and Young's modulus distribution, microstructural analysis, and visual defect evaluation. Advanced sensors for Acoustic Emission (AE) and Electrical Contact Resistance (ECR) gave characterization together with micro-scratch testing. The use of Photoluminescence Spectroscopy is proposed for the new composite materials. The electron transfer pathway can be studied with time-resolved spectroscopy. Renewable energy production by breaking down waste into hydrogen-rich syngas can be achieved through pyrolysus, followed by steam reforming and purification. The obtained novel materials show promising application solutions with increased durability, corrosion, and wear resistance.

Keywords: Additive Manufacturing, Directed Energy Deposition, Composites

 
 
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