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<p>This work aims to investigate the effect of pore size on the corrosion behavior of Ti6Al4V/25Ta composites. Samples with two different pore size distributions and similar pore volume fractions were fabricated using the space holder solid-state sintering technique. Results show that the microstructure of samples is similar regardless of the pore size, which mainly comprises β-Ti and martensite α’-Ti. The porosity was fully interconnected in both kinds of samples, with average pore size of 95 and 270&#xa0;µm, respectively. The corrosion behavior was improved by adding pores and increasing their size, as E<sub>corr</sub> is higher and I<sub>corr</sub> is lower compared to samples without large pores. This improvement is attributed to better distribution of corrosive liquid throughout the sample, thanks to fully interconnected porosity that inhibits the formation of corrosion pits.</p> Graphical abstract <p></p>

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Pore size effect on corrosion resistance of highly porous Ti6Al4V/25Ta composites

  • 期刊论文

  • 发表日期：

    2025年1月9日

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  • Rogelio Macias,
  • Pedro Garnica,
  • Julio Cesar Villalobos,
  • Jorge Alejandro Avila-Olivera,
  • Luis Olmos,
  • Dante Arteaga

摘要

This work aims to investigate the effect of pore size on the corrosion behavior of Ti6Al4V/25Ta composites. Samples with two different pore size distributions and similar pore volume fractions were fabricated using the space holder solid-state sintering technique. Results show that the microstructure of samples is similar regardless of the pore size, which mainly comprises β-Ti and martensite α’-Ti. The porosity was fully interconnected in both kinds of samples, with average pore size of 95 and 270 µm, respectively. The corrosion behavior was improved by adding pores and increasing their size, as Ecorr is higher and Icorr is lower compared to samples without large pores. This improvement is attributed to better distribution of corrosive liquid throughout the sample, thanks to fully interconnected porosity that inhibits the formation of corrosion pits.

Graphical abstract