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- Title
Zn-Mg-Sr Alloy Synthesized by Mechanical Alloying and Spark Plasma Sintering for Bioapplications.
- Authors
Nečas, David; Kubásek, Jiří; Pinc, Jan; Marek, Ivo; Donik, Črtomir; Paulin, Irena; Vojtěch, Dalibor
- Abstract
Zinc is recognized as a promising material for biodegradable applications, primarily due to its remarkable biocompatibility and reasonable corrosion rate, which avoids the formation of toxic byproducts and hydrogen release. However, its mechanical properties are often inadequate for many medical applications. This study focuses on addressing the mechanical limitations of zinc by refining its microstructure, particularly by reducing grain size. To achieve this, we employ a combination of two powder metallurgy techniques: mechanical alloying (MA) and spark plasma sintering (SPS). By utilizing these methods, we prepare a nanograin material with a composition of Zn-1Mg-0.5Sr. Both selected alloying elements to improve the mechanical properties and biocompatibility of zinc alloys. The compacted material exhibits a microstructure comprising zinc grains and intermetallic phases of Mg2Zn11 and SrZn13, ranging in size from 100 nm to 500 nm. This refined microstructure leads to exceptional mechanical properties, including high hardness (86 HV1) and compressive strength (327 MPa). Notably, the proposed combination of techniques offers an innovative approach to achieving extremely fine microstructures while minimizing significant grain coarsening during powder compaction at elevated temperatures. The authors would like to thank to the Czech Science Foundation (project no. 21-11439K) and to the Slovenian Research Agency, (project No. N2-0182 and research core funding No. P2-0132) for their financial support.
- Subjects
SINTERING; ZINC alloys; BIOCOMPATIBILITY; POWDER metallurgy; MECHANICAL alloying
- Publication
Materials & Technologies / Materiali in Tehnologije, 2023, Vol 57, Issue 5, p62
- ISSN
1580-2949
- Publication type
Article
- DOI
10.17222/mit.1022.2023