http://hdl.handle.net/10256/1544 2025-08-30T06:28:11Z 2025-08-30T06:28:11Z Zaidi, Sihem Sánchez Rodríguez, Daniel Farjas Silva, Jordi Verdejo Márquez, Raquel López Manchado, Miguel Ángel Trias Mansilla, Daniel Costa i Balanzat, Josep http://hdl.handle.net/10256/27121 2025-07-21T11:07:22Z 2025-07-02T00:00:00Z

Polymerization kinetics of a recyclable thermoplastic as a matrix for structural composites Zaidi, Sihem; Sánchez Rodríguez, Daniel; Farjas Silva, Jordi; Verdejo Márquez, Raquel; López Manchado, Miguel Ángel; Trias Mansilla, Daniel; Costa i Balanzat, Josep In this contribution we have performed the kinetic analysis of the curing process and of its thermal decomposition. Due to the presence of a peroxide initiator, polymerization is a complex process involving an induction period for a fast cross-linking reaction. From the kinetic analysis, we have been able to characterize the induction time and the degradation kinetics. Finally, from the analysis of the volatiles we have determine that the main volatile generated during decomposition is the monomer

2025-07-02T00:00:00Z Daza Collier, Jason Curbelo-Cano, Zaida Montero, Cristina M. Ben Mbarek, Wael Escoda i Acero, Ma. Lluïsa Saurina Canals, Joan Palmero, Ester M. Bollero, Alberto Bruna, Pere Suñol Martínez, Joan Josep http://hdl.handle.net/10256/26862 2025-06-02T12:23:17Z 2025-03-01T00:00:00Z

Effects of Processing Conditions of a Ball-Milled Fe65Co35 Soft Ferromagnetic Alloy on the Structural, Thermal, and Magnetic Properties Daza Collier, Jason; Curbelo-Cano, Zaida; Montero, Cristina M.; Ben Mbarek, Wael; Escoda i Acero, Ma. Lluïsa; Saurina Canals, Joan; Palmero, Ester M.; Bollero, Alberto; Bruna, Pere; Suñol Martínez, Joan Josep The Fe65Co35 alloy is a well-known Fe-based soft ferromagnetic alloy with excellent soft magnetic properties, which make it a strong candidate to be used in technological applications. In the present work, synthesizing nanoscrystalline Fe65Co35 alloy by mechanical alloying is focused on, adding cyclohexane (C6H12) acting as a process control agent (PCA). PCAs are effective in favoring nanostructured alloys with uniform grain size. The production of this type of alloy is a promising approach to tune the magnetic hardness in Fe65Co35. Structural, thermal, morphological, and magnetic properties have been studied after milling for 10, 25, and 50 h with and without the PCA. In the structural analysis, it is shown that the cubic α-Fe(Co) phase is the predominant phase in all samples. The use of the PCA favors its nanocrystallinity; however, it slows Co diffusion into the Fe matrix. Thermal analysis detects an endothermic process between 525 and 575 °C in the samples milled with C6H12 only. This is associated with the transition of the residual Fe3Co superlattice, to the stable α-Fe(Co). The effect of the residual Fe3Co at room temperature on the magnetic properties is twofold, by decreasing the saturation magnetization of Fe65Co35 but increasing both remanent magnetization and coercivity

2025-03-01T00:00:00Z Zhou, Tong Cañabate Ortiz, Dolors Bubnys, Remigijus Stanikūnienė, Brigita Colomer, Jordi http://hdl.handle.net/10256/26829 2025-05-27T07:57:28Z 2025-08-01T00:00:00Z

Collaborative learning, cooperative learning and reflective learning to foster sustainable development: A scoping review Zhou, Tong; Cañabate Ortiz, Dolors; Bubnys, Remigijus; Stanikūnienė, Brigita; Colomer, Jordi Education for Sustainable Development (ESD) plays a key role in addressing global challenges. This study highlights the key role of collaborative, cooperative and reflective learning in enhancing students' ability to promote sustainable development. In this study, narrative analysis techniques were used to analyse 172 manuscripts with the core keywords ‘reflective learning’ or ‘cooperative learning’ or ‘collaborative learning’ and ‘sustainability’ or ‘sustainable development’ and ‘education’ that resulted from the search in SCOPUS and Web of Science for the period 1994 to 2023 and the paper selection process. These articles provide a comprehensive overview of collaborative and reflective learning in the context of sustainable development. This study demonstrates how critical it is to identify and deal with students' limits in terms of reflection and cooperation. To genuinely contribute to sustainable development, students must not only possess the necessary knowledge, but also embody values and global awareness, thus enabling them to reflect on and evaluate their practical experiences within complex contexts. Despite potential obstacles of individual differences and cooperation challenges, the review emphasises the importance of innovative pedagogical strategies in providing students with engaging educational opportunities that inspire a commitment to advocating for sustainable development. This study highlights the potential of diverse pedagogical programmes in cultivating sustainable competencies and underscores the significance of recognising and overcoming constraints for the effective implementation of education in sustainable development

2025-08-01T00:00:00Z Latorre Lázaro, Núria Casellas, Daniel Costa i Balanzat, Josep Garcia-Llamas, Eduard Pujante, Jaume http://hdl.handle.net/10256/26701 2025-04-25T10:36:02Z 2025-04-24T00:00:00Z

Cold Forming Hybrid Aluminium-Carbon Fibre-Reinforced Polymer Sheets Joined by Mechanical Interlocking Latorre Lázaro, Núria; Casellas, Daniel; Costa i Balanzat, Josep; Garcia-Llamas, Eduard; Pujante, Jaume Forming hybrid structures into complex shapes is key to address lightweighting of automotive parts. Recently, an innovative joining technique between aluminium and Carbon Fibre-Reinforced Polymer (CFRP) based on mechanical interlocking through sheet punching has been developed. However, scaling up the solution requires the assessment of challenges, such as multi-material forming and joint integrity, after forming operations. Therefore, this work proves the feasibility of forming aluminium-CFRP prepreg panels into complex omega-shaped profiles following a conventional cold-stamping process. Forming without defects was possible even in specimens featuring mechanical joints generated through punching. The effect of the CFRP position (in the inner or the outer side of the formed profile), the number of mechanical joints, the addition of a Glass Fibre-Reinforced Polymer (GFRP) intermediate layer to prevent galvanic corrosion and adequate lubrication on necking, cracking, springback behaviour and the final geometry after curing were studied. Compression tests were performed to assess the mechanical response of the hybrid profile, and the results showed that the addition of CFRP in the aluminium omega profile changed the buckling behaviour from global bending to axial folding, increasing the maximum compression load. Additionally, the presence of mechanical interlocking joints further improved the mechanical performance and led to a more controlled failure due to buckling localization in the geometric discontinuity

2025-04-24T00:00:00Z