Microstructural and mechanical characterization of newly developed Zn-Mg-CaO composite

0565149 - FZÚ 2023 RIV CH eng J - Článek v odborném periodiku
Pinc, Jan - Kubásek, J. - Drahokoupil, Jan - Čapek, Jaroslav - Vojtěch, D. - Školáková, Andrea
Microstructural and mechanical characterization of newly developed Zn-Mg-CaO composite.
Materials. Roč. 15, č. 23 (2022), č. článku 8703. E-ISSN 1996-1944
Grant CEP: GA MŠMT(CZ) EF16_019/0000760; GA MŠMT LM2018110
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: extrusion * biodegradable metals * zinc * EBSD * compressive properties * ball milling * powder metallurgy * µCT
Obor OECD: Materials engineering
Impakt faktor: 3.4, rok: 2022
Způsob publikování: Open access

In this study, the Zn-0.8Mg-0.28CaO wt.% composite was successfully prepared using different conditions of ball milling (rotations and time) followed by a direct extrusion process. These materials were characterized from the point of view of microstructure and compressive properties, and the correlation between those characteristics was found. Microstructures of individual materials possessed differences in grain size, where the grain size decreased with the intensified conditions (milling speed and time). However, the mutual relation between grain size and compressive strength was not linear. This was caused by the effect of other factors, such as texture, intermetallic phases, and pores. Material texture affects the mechanical properties by a different activity ratio between basal and pyramidal c + a slips. The properties of intermetallic particles and pores were determined in material volume using micro-computed tomography (µCT), enhancing the precision of our assumptions compared with commonly applied methods. Based on that, and the analysis after the compressive tests, we were able to determine the influence of aspect ratio, feret diameters, and volume content of intermetallic phases and pores on mechanical behavior. The influence of the aspects on mechanical behavior is described and discussed.
Trvalý link: https://hdl.handle.net/11104/0336656