@misc{nidadavolu_effect_of_2024, 
author={Nidadavolu, E.,Wolff, M.,Ebel, T.,Willumeit-Römer, R.},
title={Effect of Powder Surface Oxides in Ensuring a Reproducible Homogenous Microstructure in Powder Processed Mg-0.6Ca Alloy},
year={2024},
howpublished = {conference paper: Malmö (SWE); 29.09.2024-02.10.2024},
doi = {https://doi.org/10.59499/EP246281669},
abstract = {Liquid phase sintered biodegradable Mg-0.6Ca alloy generally exhibits an isotropic microstructure with homogenously restricted grain size of 30 µm, even after long sintering durations of 60 h at 625 °C. Such sintered microstructures reveal the presence of numerous impurity oxide particles at the grain boundaries, which are evident also on the initial gas atomized powder surfaces. However, after a mechanical powder sieving treatment for 20 min, the surface SiO2 concentration dropped from initially 220 ppm to 85 ppm, resulting in heterogeneous grain coarsening after sintering for 18 h at 625°C. For the use of Mg-Ca materials as biodegradable implants, reproducibility of in vitro degradation results is a prerequisite, for which a homogenous grain structure is desired. However, the lowered oxide-pinning effect at certain grain boundaries created heterogeneous grain coarsening and this indicates the necessity for the careful handling of fine powders to ensure repeatability in degradation and mechanical properties. © European Powder Metallurgy Association (EPMA)},
note = {Online available at: \url{https://doi.org/10.59499/EP246281669} (DOI). Nidadavolu, E.; Wolff, M.; Ebel, T.; Willumeit-Römer, R.: Effect of Powder Surface Oxides in Ensuring a Reproducible Homogenous Microstructure in Powder Processed Mg-0.6Ca Alloy. In: Proceedings - Euro PM 2024 Congress and Exhibition. Malmö (SWE). European Powder Metallurgy Association (EPMA). 2024. DOI: 10.59499/EP246281669}}