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Factors Controlling the Synthesis of Porous Ti-Based Biomedical Alloys by Electrochemical Deoxidation in Molten Salts
Metallurgical and Materials Transactions B ( IF 2.4 ) Pub Date : 2021-03-29 , DOI: 10.1007/s11663-021-02126-5
D. Sri Maha Vishnu , Jagadeesh Sure , R. Vasant Kumar , Carsten Schwandt

The study has aimed at understanding the key factors involved in the synthesis of porous Ti-based β-Ti-35Nb-7.9Sn alloy by electro-deoxidation of compacted and sintered TiO2-Nb2O5-SnO2 mixed oxide disks in molten calcium chloride. Processing parameters assessed were the sintering temperature, and thus, the open porosity, of the oxide precursor as well as the temperature, voltage, and time of electro-deoxidation. Process conditions were arrived at that enable the complete and efficient reduction of the mixed oxide. The Ti-35Nb-7.9Sn alloy product was single-phase bcc and had a porous microstructure with nodular particles. Electro-deoxidation experiments of different durations allowed the identification of the main intermediate phases occurring during the reduction as well as the mechanism of the oxide-to-alloy conversion. The porous Ti-35Nb-7.9Sn alloy prepared was subjected to corrosion testing in Hanks’ simulated body fluid solution and was found to exhibit superior performance when compared with dense 304L and 316L steels and brass.



中文翻译:

熔融盐中电化学脱氧控制多孔钛基生物医学合金合成的因素

该研究旨在了解通过压实和烧结的TiO 2 -Nb 2 O 5 -SnO 2的电脱氧合成多孔Ti基β-Ti-35Nb-7.9Sn合金的关键因素。熔融氯化钙中的混合氧化物圆盘。评估的工艺参数是烧结温度,因此是氧化物前体的开孔率,以及电脱氧的温度,电压和时间。达到了能够完全有效地还原混合氧化物的工艺条件。Ti-35Nb-7.9Sn合金产品为单相bcc并具有带有球状颗粒的多孔微结构。不同持续时间的电脱氧实验可以确定还原过程中发生的主要中间相,以及氧化物向合金转化的机理。多孔Ti-35Nb-7。

更新日期:2021-03-30
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