Matheus Bellot de Alvarenga, Leandro Santos da Silva
One of the current challenges in materials research for sustainable technologies is the development of efficient alternatives for clean energy generation. In this context, the recovery of low-grade thermal waste using thermomagnetic motors has gained increasing attention. A major limitation for the advancement of this technology is the availability of materials with suitable structural, magnetic, and corrosion properties. Accordingly, this study investigates two intermetallic compounds, CuMnNiSn and CuFe0.4Mn0.8Ni0.8Sn, with the aim of assessing their potential for application in thermomagnetic systems. The effects of the partial substitution of Mn and Ni by Fe were examined with respect to microstructure, corrosion behavior, and Curie temperature. The CuMnNiSn compound exhibited two phases with equivalent chemical compositions but distinct space groups, while CuFe0.4Mn0.8Ni0.8Sn presented an additional Fe-rich phase. Linear polarization tests indicated that CuMnNiSn displayed superior corrosion resistance compared to CuFe0.4Mn0.8Ni0.8Sn, with corrosion rates of 6.79 × 10−3 and 0.910 mm year−1, respectively. The Curie temperatures were approximately 360 K for CuMnNiSn, as well as 370 K and 990 K for CuFe0.4Mn0.8Ni0.8Sn. Hardness measurements confirmed that CuMnNiSn exhibited the lowest hardness among the evaluated compositions, reaching a value of 485 HV, while CuFe0.4Mn0.8Ni0.8Sn reached 609 HV.
@article{d7fafc60-5ee2-4822-88c8-2a509941e475,
title={Effect of Fe on the Microstructure and Properties of the CuMnNiSn Compound},
author={Matheus Bellot de Alvarenga and Leandro Santos da Silva},
year={2026},
language={pt}
}TY - JOUR TI - Effect of Fe on the Microstructure and Properties of the CuMnNiSn Compound AU - Matheus Bellot de Alvarenga AU - Leandro Santos da Silva PY - 2026 LA - pt ER -
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