Fabrication of strong bioresorbable composites from electroexplosive Fe-Fe(3)O(4) nanoparticles by isostatic pressing followed by vacuum sintering

Bulk samples with high mechanical strength reaching 1000 MPa were obtained from electroexplosive Fe-Fe(3)O(4) 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 t...

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Detalles Bibliográficos
Autores principales: Lozhkomoev, A.S., Kazantsev, S.O., Bakina, O.V., Pervikov, A.V., Sharipova, A.F., Chymaevskii, A.V., Lerner, M.I.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9508424/
https://www.ncbi.nlm.nih.gov/pubmed/36164514
http://dx.doi.org/10.1016/j.heliyon.2022.e10663
Descripción
Sumario:Bulk samples with high mechanical strength reaching 1000 MPa were obtained from electroexplosive Fe-Fe(3)O(4) 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 Fe(3)O(4) with the formation of FeO leading to the embrittlement of the samples and a decrease in their strength. The degradation rate of Fe- Fe(3)O(4) 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.

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