Work

Synthesis and spark plasma sintering of Ti5Si3-Mo powders with core-shell structure

Year: 2024

Type: article

Abstract: Core-shell Ті 5 Si 3 -Mo powders were successfully synthesized by reducing of ammonium molybdate (para) tetrahydrate with hydrogen and glycerol, respectively. As a result, the Ti 5 Si 3 core was coated with submicron and nanosized Mo particles. The morphology and microstructure of the synthesized powders were studied scanning electron microscopy along with local chemical analysis. Phase analysis was performed using X-ray diffraction. The synthesized powders were densified by spark plasma sintering (SPS) at a temperature of 1500 °C. It was shown that powders with a core-shell structure are densified up to a temperature of 1330 °C, while the mechanical mixture of commercial powders at this temperature only begins to densify. The hardness (HV20) of the obtained composites was also investigated. Compressive strength investigation at room temperature shows 5.5 % plastic strain and ultimate strength of about 3 GPa as well as fractographic studies have shown the presence of a pseudo-brittle fracture mechanism for the metal matrix composite (MMC), which was sintered by SPS of the core-shell Ti 5 Si 3 -Mo powder synthesized by reduction with glycerol.

Source: Vacuum

DOI: 10.1016/j.vacuum.2024.113843

Authors: Ievgen Solodkyi, Vadim Mosiichuk, Oleksandr Kucher, Manja Krüger

Institutions: National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Otto-von-Guericke-Universität Magdeburg

Language: English

Topic: Intermetallics and Advanced Alloy Properties

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,990

Funder: Alexander von Humboldt-Stiftung