Publication: Desarrollo de aleaciones de alta entropía con Cu para su uso en reactores de fusión nuclear
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2023-10
Defense date
2023-12-15
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Abstract
High entropy alloys (HEAs) have garnered significant attention from both academic and industrial research communities due to their exceptional structural and functional properties. However, the exploration of Cu-based HEAs remains a relatively underexplored area, leading to a limited understanding of this alloy class. The primary objective of this thesis is to produce and characterize HEAs with low activation elements for potential application in nuclear fusion reactors. To accomplish this objective, the research is divided into three sections:
i) Design, fabrication, and characterization of the CuCrFeVTi HEA family. The Cu content within the alloys was systematically varied to investigate the influence of this element on microstructure and mechanical properties. Based on the obtained results, the optimal Cu content was determined.
ii) Study of the Cu5Cr35Fe35V20(Ti, Ta, W, Mo)5 HEA system. Four alloys were examined, each alloy varying a single element while maintaining the same atomic ratios as the most favorable composition determined in part i). Microstructural and mechanical properties were analyzed, and the results were correlated to the compositional differences.
iii) Assessment of HEAs as potential thermal barriers. The thermal properties of the Cu5Cr35Fe35V20(Ti, Ta, W, Mo)5 alloys were evaluated to determine their viability as thermal barriers.
By undertaking this research, the thesis aims to contribute to the understanding of Cu-based HEAs containing low activation elements, with the ultimate goal of advancing their use in nuclear fusion reactor applications.
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Aleaciones de cobre, Aleaciones de alta entropía, Nanoindentación, Fusión por arco, High entropy alloys, Cooper alloys, Arc-melting, Nanoindentation