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Volume 70, Issue 1
  • ISSN: 2056-5135
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  • oa A Comparison of the Microstructure and Corrosion of Commercial Purity Titanium and Titanium-Aluminium-Vanadium Alloy Modified with Palladium and Ruthenium and Processed by Powder Metallurgy

    Adding low levels of PGMs to titanium and its alloys increases their corrosion resistance

  • Authors: M. A. Ashworth1, R. M. Ward1, H. G. C. Hamilton2 and A. J. Davenport1
  • 1 School of Metallurgy and Materials, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK 2 Johnson Matthey, Blounts Court Road, Sonning Common, Reading, Berkshire, RG4 9NH, UK
    *[email protected]
  • Source: Johnson Matthey Technology Review, Volume 70, Issue 1, Jan 2026, p. 81 - 100
  • DOI: https://doi.org/10.1595/205651326X17476570815207
    • Received: 04 Aug 2023
    • Accepted: 19 May 2025

Abstract

The increasing demand for advanced materials in oil and gas exploration has driven renewed interest in modified Ti-6Al-4V alloys, particularly those doped with noble metals such as palladium and ruthenium. This study investigates the microstructural and corrosion behaviour of palladium- and ruthenium-modified commercial purity titanium (cp-Ti) and Ti-6Al-4V alloys fabricated hot isostatic pressing (HIP) of 150–500 µm powders. Results reveal a non-uniform distribution of the noble metals, with enrichment at interparticle boundaries under the applied HIP conditions. Tailoring of microstructures was achieved by varying powder size and HIP parameters, with distinct β-phase morphologies observed between palladium- and ruthenium-modified samples. Palladium additions demonstrated superior corrosion resistance compared to ruthenium, highlighting the influence of dopant selection on alloy performance. The findings underscore the importance of powder metallurgical approaches for noble metal doping, offering pathways to microstructures and properties unattainable through conventional melt and wrought processing. This work emphasises the need for continued development of simulant protocols to bridge laboratory studies with field applications.

© 2026 Johnson Matthey
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/content/journals/10.1595/205651326X17476570815207
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A Comparison of the Microstructure and Corrosion of Commercial Purity Titanium and Titanium-Aluminium-Vanadium Alloy Modified with Palladium and Ruthenium and Processed by Powder Metallurgy
Johnson Matthey Technology Review 70, 81 (2026); https://doi.org/10.1595/205651326X17476570815207
/content/journals/10.1595/205651326X17476570815207
/content/journals/10.1595/205651326X17476570815207
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