Fabrication of strong bioresorbable composites from electroexplosive Fe-Fe3O4 nanoparticles by isostatic pressing followed by vacuum sintering

Bulk samples with high mechanical strength reaching 1000 MPa were obtained from electroexplosive Fe-Fe3O4 nanoparticles containing 81 wt. % Fe. Maximum strength is achieved by consolidation of the nanoparticles by isostatic pressing followed by vacuum sintering at 700 °C. A further increase in the s...

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Bibliographic Details
Published in:Heliyon 2022-09, Vol.8 (9), p.e10663-e10663, Article e10663
Main Authors: Lozhkomoev, A.S., Kazantsev, S.O., Bakina, O.V., Pervikov, A.V., Sharipova, A.F., Chymaevskii, A.V., Lerner, M.I.
Format: Article
Language:English
Subjects:
Bioresorbable composites
Corrosion
Electrical explosion of wire
Fe-Fe3O4 nanopowders
Sintering
Strength
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Summary:Bulk samples with high mechanical strength reaching 1000 MPa were obtained from electroexplosive Fe-Fe3O4 nanoparticles containing 81 wt. % Fe. Maximum strength is achieved by consolidation of the nanoparticles by isostatic pressing followed by vacuum sintering at 700 °C. A further increase in the sintering temperature leads to the formation of large pores with a size of up to 5 μm and an intense interaction of Fe and Fe3O4 with the formation of FeO leading to the embrittlement of the samples and a decrease in their strength. The degradation rate of Fe- Fe3O4 samples in NaCl (0.9% wt.) and Hank's solution is 7 times higher than that of samples obtained by sintering an electroexplosive Fe nanopowder under the same conditions. Fe-Fe3O4 nanopowders; Electrical explosion of wire; Bioresorbable composites; Sintering; Corrosion; Strength.
ISSN:2405-8440
2405-8440
DOI:10.1016/j.heliyon.2022.e10663