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Kinetics of Phase Transformations in the Zn-0.8% Li Alloy
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DOI：10.1134/S1067821225601261.png)
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Abstract
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Recent research has shown that zinc alloys are among the most promising materials for bioresorbable (biosoluble) implants. This paper presents the phase transformation of a new promising bioresorbable alloy, Zn-0.8Li. It was found that after quenching from 300 degrees C, the alloy has a structure consisting of a mixture of two isomorphic supersaturated solid solutions: a Li solution in the zinc phase and a Zn solution in the primary crystallites of the LiZn4 phase. During subsequent aging for 20-50 h at room temperature, the alloy undergoes natural aging, during which thin (approximately 1 mu m thick) zinc plates precipitate in the LiZn4 phase, and submicron LiZn4 particles precipitate in the zinc phase. The phase transformation pattern during aging was obtained based on the results of X-ray diffraction analysis, SEM microstructural studies, and electrical conductivity studies at different stages of natural aging. The maximum microhardness value is achieved after 48 h of aging.
Keywords:
zinc alloy
bioresorbable materials
Zn phase
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