2026-04-18T07:43:13Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/250792026-04-16T03:19:55Zcom_2072_452955com_2072_2054col_2072_453063

Microstructure, martensitic transformation kinetics, and magnetic properties of (Ni50Mn40In10)100−xCox melt-spun ribbons Bekhouche, Ahlem Alleg, Safia Dadda, Karima Daoudi, Ibrahim Mourad Saurina Canals, Joan Suñol Martínez, Joan Josep Transformacions martensítiques Martensitic transformations Microestructura Microstructure Aliatges Alloys The effect of Co-doping on the structure, microstructure, martensitic phase transformation kinetics, and magnetic properties of the melt-spun (Ni50Mn40In10)1−xCox (x = 1, 2, and 3) Heusler ribbons, named hereafter Co1 (x = 1), Co2 (x = 2), and Co3 (x = 3), was assessed using X-ray diffraction, scanning electron microscope, energy-dispersive spectroscopy, X-ray fluorescence, differential scanning calorimetry, and vibrating sample magnetometer. The XRD results reveal the formation of a 14M martensite structure alongside the face-centered-cubic (fcc) γ phase. The crystallite size ranges between 50 and 98 nm for the 14M martensite and from 9 to 16 nm for the γ phase. The mass fraction of the γ phase lies between 36.4 and 44.2%. Co-doping affects the lattice parameters and the characteristic temperatures (martensite start, martensite finish, austenite start, and austenite finish). The calculated activation energy values for the non-isothermal martensitic transformation kinetics are 257 kJ mol−1 and 135.6 kJ mol−1 for the Co1 and Co2, respectively. The produced ribbons show a paramagnetic behavior. The variation in the coercivity can be related to the crystallite size and mass fraction of the γ phase. The produced ribbons exhibit an exchange bias at room temperature that decreases with increasing the Co content Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature 2025-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion peer-reviewed http://hdl.handle.net/10256/25079 eng info:eu-repo/semantics/altIdentifier/doi/10.1007/s10973-024-13277-3 info:eu-repo/semantics/altIdentifier/issn/1388-6150 info:eu-repo/semantics/altIdentifier/eissn/1588-2926 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess application/pdf Springer Nature Journal of Thermal Analysis and Calorimetry, 2025, vol. 150, p. 953-964 Articles publicats (D-F)