7–11 Jul 2025
University of the Witwatersrand, Johannesburg
Africa/Johannesburg timezone

Ab initio studies of Platinum alloyed with Chromium for jewellery applications: energetic stabilities and structural properties

Not scheduled
20m
Solomon Mahlangu House (University of the Witwatersrand, Johannesburg)

Solomon Mahlangu House

University of the Witwatersrand, Johannesburg

Poster Presentation Track A - Physics of Condensed Matter and Materials Poster Session

Speaker

Mr Mawisha Jan Mafifi (University of Pretoria)

Description

The Pt-based materials are widely used in industries, including metallurgy, medicine, jewellery, fuel cells, and hydrogen evolution reactions due to their excellent electrochemical properties. However, in its pure form, platinum (Pt) is soft, thus prone to surface scratching, a concern in jewellery applications. Hence, alloying to enhance its mechanical properties is key to improving scratch resistance. This study employs first-principles calculations to investigate the effect of alloying with high corrosion resistant chromium (Cr) on phase stability, structural and mechanical properties of Pt. Calculations are carried out on FCC (face-centered cubic) structure using density functional theory (DFT) based Quantum Expresso package.

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Primary author

Mr Mawisha Jan Mafifi (University of Pretoria)

Co-authors

Dr Donald Mkhonto (MINTEK) Dr Edwin Mapasha (University of Pretoria) Dr Maje Phasha (MINTEK)

Presentation materials

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