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Issue 40, 2019
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A generalized solid strengthening rule for biocompatible Zn-based alloys, a comparison with Mg-based alloys

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Abstract

Solid solution strengthening has been widely used in designing various high-performance biocompatible Mg-based alloys, but its transferability to other biocompatible metals such as Zn-based alloys is questionable or nearly absent. In the present study, an ab initio informed Peierls–Nabarro model and Leyson et al.'s strengthening model are used for a systematic investigation on solute strengthening in Zn-based alloys, which is compared with the widely studied Mg-based alloys. Although an inverse relationship was revealed between volume misfit εb and chemical misfit εSFE for both Zn-based and Mg-based alloys, most solutes would however result in positive εb and negative εSFE for Zn-based alloys, differing from Mg-based alloys. With εb and εSFE as two key descriptors, a generalized scaling diagram is finally drawn for a fast evaluation of solid solution strengthening in Zn-based alloys, indicating that the alkaline-earth and rare earth elements are better strengtheners for Zn-based alloys, which provides a general rule in designing novel biocompatible materials.

Graphical abstract: A generalized solid strengthening rule for biocompatible Zn-based alloys, a comparison with Mg-based alloys

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Publication details

The article was received on 23 Jul 2019, accepted on 19 Sep 2019 and first published on 27 Sep 2019


Article type: Paper
DOI: 10.1039/C9CP04106K
Phys. Chem. Chem. Phys., 2019,21, 22629-22638

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    A generalized solid strengthening rule for biocompatible Zn-based alloys, a comparison with Mg-based alloys

    Y. Guo, S. Zhang, B. Wei, D. Legut, T. C. Germann, H. Zhang and R. Zhang, Phys. Chem. Chem. Phys., 2019, 21, 22629
    DOI: 10.1039/C9CP04106K

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