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Volume 69, Issue 3
  • ISSN: 2056-5135
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  • oa Investigation of Microstructural Characteristics and Mechanical Properties in Platinum-Rhodium Alloy Strengthened by Zirconium and Yttrium

    Enhancing the high-temperature service performance of Pt-10Rh alloys

  • Authors: Changyi Hu1,2, Xiangxing Xiao1,2, Qianqi Wei1,2, Junmei Guo1,2, Xian Wang1,2, Li Chen1,2, Hongzhong Cai1,2, Xuehang Wang1,2, Xiaohong Yuan1,2, Yan Wei1,2 and Zhentao Yuan3
  • Affiliations: 1 State Key Laboratory of Platinum Metal Functional Materials, Kunming Institute of Precious Metals, Kunming 650106, China 2 Yunnan Precious Metals Laboratory Co Ltd, Kunming 650106, China 3 School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650051, China
    *[email protected]
  • Source: Johnson Matthey Technology Review, Volume 69, Issue 3, Jul 2025, p. 475 - 488
  • DOI: https://doi.org/10.1595/205651325X17236380041123
    • Received: 03 Apr 2024
    • Accepted: 13 Aug 2024

Abstract

In pursuit of enhancing the high-temperature service performance of Pt-10Rh alloys, this study focuses on the preparation of two Pt-10Rh-based alloys through the incorporation of reinforcing elements zirconium and zirconium-yttrium. The investigation into the microstructure, mechanical properties and strengthening mechanisms of the alloys involved the utilisation of analytical tools such as an optical metallographic microscopy (OM), X-ray diffraction (XRD), selected area electron diffraction (SAED), energy-dispersive X-ray spectroscopy (EDS) and tensile testing, coupled with first-principle computational analysis methods. The research results indicate the presence of PtY precipitate phase and zirconium yttrium oxides in Pt-10Rh-0.5Zr-0.2Y alloy, but not detected in Pt-10Rh-0.5Zr alloy. It was found that adding a small amount of zirconium and yttrium elements to Pt-10Rh alloy can significantly enhance the mechanical properties at room temperature and 1300°C, especially the composite addition of zirconium and yttrium elements, which can also improve the high-temperature plasticity of the alloy. The strengthening mechanisms of zirconium and yttrium elements on Pt-10Rh alloy are mainly solid solution strengthening and second phase strengthening. The relationship between the mechanical properties of platinum-rhodium based alloys and their valence electron structure was discussed. The zirconium and yttrium reinforced platinum-rhodium based alloy studied in this work can replace Pt-10Rh alloy in certain fields.

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2025-07-01
2025-06-13
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Investigation of Microstructural Characteristics and Mechanical Properties in Platinum-Rhodium Alloy Strengthened by Zirconium and Yttrium
Johnson Matthey Technology Review 69, 475 (2025); https://doi.org/10.1595/205651325X17236380041123
/content/journals/10.1595/205651325X17236380041123
/content/journals/10.1595/205651325X17236380041123
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  • Article Type: Research Article

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