通过等静压随后真空烧结，由电爆炸法制备的Fe-FeO纳米颗粒制造高强度生物可吸收复合材料。

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

作者信息

Lozhkomoev A S, Kazantsev S O, Bakina O V, Pervikov A V, Sharipova A F, Chymaevskii A V, Lerner M I

机构信息

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, ISPMS SB RAS, 634021 Tomsk, Russia.

Department of Materials Science and Engineering, Technion, 3200003 Haifa, Israel.

出版信息

Heliyon. 2022 Sep 16;8(9):e10663. doi: 10.1016/j.heliyon.2022.e10663. eCollection 2022 Sep.

DOI:10.1016/j.heliyon.2022.e10663

PMID:36164514

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9508424/

Abstract

Bulk samples with high mechanical strength reaching 1000 MPa were obtained from electroexplosive Fe-FeO 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 FeO with the formation of FeO leading to the embrittlement of the samples and a decrease in their strength. The degradation rate of Fe- FeO 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.

摘要

通过电爆炸法制备的含81 wt.%铁的Fe-FeO纳米颗粒，可获得机械强度高达1000 MPa的块状样品。通过等静压固结纳米颗粒，然后在700°C下进行真空烧结，可实现最大强度。烧结温度的进一步升高会导致形成尺寸达5μm的大孔，并且铁与氧化亚铁之间发生强烈相互作用生成氧化亚铁，从而导致样品脆化并使其强度降低。在相同条件下，Fe-FeO样品在NaCl（0.9% wt.）和汉克氏溶液中的降解速率比烧结电爆炸铁纳米粉末所得样品的降解速率高7倍。