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Mosesso L, Macis S, D’Arco A, Marcelli A, Notargiacomo A, Pea M, Spataro B, Stagno V, Lupi S. Characterization of CuAg Alloys with Low Ag Concentrations. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1823. [PMID: 38673179 PMCID: PMC11051242 DOI: 10.3390/ma17081823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/10/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024]
Abstract
Copper-based alloys designed to combine high electronic and thermal conductivities with high mechanical strength find a wide range of applications in different fields. Among the principal representatives, strongly diluted CuAg alloys are of particular interest as innovative materials for the realization of accelerating structures when the use of high-gradient fields requires increasingly high mechanical and thermal performances to overcome the limitations induced by breakdown phenomena. This work reports the production and optical characterization of CuAg crystals at low Ag concentrations, from 0.028% wt to 0.1% wt, which guarantee solid solution hardening while preserving the exceptional conductivity of Cu. By means of Fourier Transform Infrared (FTIR) micro-spectroscopy experiments, the low-energy electrodynamics of the alloys are compared with that of pure Cu, highlighting the complete indistinguishability in terms of electronic transport for such low concentrations. The optical data are further supported by Raman micro-spectroscopy and SEM microscopy analyses, allowing the demonstration of the full homogeneity and complete solubility of solid Ag in copper at those concentrations. Together with the solid solution hardening deriving from the alloying process, these results support the advantage of strongly diluted CuAg alloys over conventional materials for their application in particle accelerators.
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Affiliation(s)
- Lorenzo Mosesso
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (L.M.); (S.M.); (A.D.)
| | - Salvatore Macis
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (L.M.); (S.M.); (A.D.)
| | - Annalisa D’Arco
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (L.M.); (S.M.); (A.D.)
| | - Augusto Marcelli
- INFN—Laboratori Nazionali di Frascati, via Enrico Fermi 54, 00044 Rome, Italy; (A.M.); (B.S.)
- Rome International Centre for Materials Science Superstripes, Via dei Sabelli 119A, 00185 Rome, Italy
| | - Andrea Notargiacomo
- Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, IFN-CNR, Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (A.N.); (M.P.)
| | - Marialilia Pea
- Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, IFN-CNR, Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (A.N.); (M.P.)
| | - Bruno Spataro
- INFN—Laboratori Nazionali di Frascati, via Enrico Fermi 54, 00044 Rome, Italy; (A.M.); (B.S.)
| | - Vincenzo Stagno
- Department of Earth Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;
| | - Stefano Lupi
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (L.M.); (S.M.); (A.D.)
- INFN Section of Rome, Sapienza University, Piazzale Aldo Moro 5, 00185 Rome, Italy
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Abstract
Recent theoretical and experimental research is triggering interest to technologies based on radiation in the region from ~0.1 to 20 Terahertz (THz). Today, this region of the electromagnetic (e.m.) spectrum is a frontier area for research in many disciplines. The technological roadmap of the THz radiation considers outdoor and indoor communications, security, drug detection, biometrics, food quality control, agriculture, medicine, semiconductors, and air pollution, and demands high-power and sub-ps compact sources, modern detectors, and new integrated systems. There are still many open questions regarding working at THz frequencies and with THz radiation. In particular, we need to invest in new methodologies and in materials exhibiting the unusual or exotic properties of THz. This book contains original papers dealing with some emerging THz applications, new devices, sources and detectors, and materials with advanced properties for applications in biomedicine, cultural heritage, technology, and space.
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