Mechanical and structural properties of bulk magnesium materials prepared via spark plasma sintering

0546040 - ÚFM 2022 RIV NL eng J - Journal Article
Březina, M. - Hasoňová, M. - Fintová, Stanislava - Doležal, P. - Rednyk, Andrii - Wasserbauer, J.
Mechanical and structural properties of bulk magnesium materials prepared via spark plasma sintering.
Materials Today Communications. Roč. 28, SEP (2021), č. článku 102569. ISSN 2352-4928. E-ISSN 2352-4928
R&D Projects: GA MŠMT(CZ) EF16_013/0001823
Institutional support: RVO:68081723 ; RVO:61389021
Keywords : in-situ precipitation * pure magnesium * plastic-deformation * grain-refinement * alloy * temperature * mg * extrusion * evolution * Magnesium powder metallurgy * sps * Three-point bending * Hardness * Microhardness * Microstructure
OECD category: Materials engineering; Materials engineering (UFP-V)
Impact factor: 3.662, year: 2021
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S2352492821005602?via%3Dihub

Field-assisted sintering is a modern approach to novel magnesium materials preparation, however, it is unclear whether it is better to sinter green compact or loose powder. This work focuses on preparing bulk materials from loose and cold-compacted magnesium powder through a field-assisted sintering technique spark plasma sintering (SPS). Green compacts were prepared under a series of compacting pressures from 100 MPa to 500 MPa. SPS was performed at 400 degrees C, 500 degrees C, and 600 degrees C applying additional pressure of 100 MPa during the sintering process. Prepared materials were analysed regarding their microstructure, hardness, and micmhardness and through the three-point bending test and fractography. The green compacts porosity decreased with increased cold-compaction pressure. The SPS positively affected porosity and mechanical properties only in loose powder and the lowest cold-compacted green compacts. Increasing cold compaction pressure of the green compacts above 200 MPa is therefore unfavourable for further SPS processing.
Permanent Link: http://hdl.handle.net/11104/0322622