Fabrication of strong bioresorbable composites from electroexplosive Fe-Fe3O4 nanoparticles by isostatic pressing followed by vacuum sintering
A.S. Lozhkomoev,
S.O. Kazantsev,
O.V. Bakina,
A.V. Pervikov,
A.F. Sharipova,
A.V. Chymaevskii,
M.I. Lerner
Affiliations
A.S. Lozhkomoev
Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, ISPMS SB RAS, 634021 Tomsk, Russia; Corresponding author.
S.O. Kazantsev
Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, ISPMS SB RAS, 634021 Tomsk, Russia
O.V. Bakina
Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, ISPMS SB RAS, 634021 Tomsk, Russia
A.V. Pervikov
Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, ISPMS SB RAS, 634021 Tomsk, Russia
A.F. Sharipova
Department of Materials Science and Engineering, Technion, 3200003 Haifa, Israel
A.V. Chymaevskii
Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, ISPMS SB RAS, 634021 Tomsk, Russia
M.I. Lerner
Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, ISPMS SB RAS, 634021 Tomsk, Russia
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.
