Ultrafine-grained Zn–Mg–Sr alloy synthesized by mechanical alloying and spark plasma sintering

0565086 - FZÚ 2023 RIV CH eng J - Článek v odborném periodiku
Nečas, D. - Kubásek, J. - Pinc, Jan - Marek, I. - Donik, Č. - Paulin, I. - Vojtěch, D.
Ultrafine-grained Zn–Mg–Sr alloy synthesized by mechanical alloying and spark plasma sintering.
Materials. Roč. 15, č. 23 (2022), č. článku 8379. E-ISSN 1996-1944
Institucionální podpora: RVO:68378271
Klíčová slova: metals and alloys * biomaterials * mechanical alloying * sintering * nanostructure * compression test
Obor OECD: Materials engineering
Impakt faktor: 3.4, rok: 2022
Způsob publikování: Open access

Zinc materials are considered promising candidates for bioabsorbable medical devices used for the fixation of broken bones or stents. Materials for these applications must meet high mechanical property requirements. One of the ways to fulfil these demands is related to microstructure refinement, particularly the decrease in grain size. In the present work, we combine two powder metallurgy techniques (mechanical alloying—MA, and spark plasma sintering—SPS) to prepare Zn–1Mg–0.5Sr nanograin material. The microstructure of compacted material consisted of Zn grains and particles of Mg2Zn11 intermetallic phases from 100 to 500 nm in size, which resulted in high values of hardness and a compressive strength equal to 86 HV1 and 327 MPa, respectively. In this relation, the combination of the suggested techniques provides an innovative way to form extremely fine microstructures without significant coarsening during powder compaction at increased temperatures.
Trvalý link: https://hdl.handle.net/11104/0336629