Resultados totales (Incluyendo duplicados): 33822
Encontrada(s) 3383 página(s)
Docta Complutense
oai:docta.ucm.es:20.500.14352/118439
Dataset. 2024

DATA: CORROSION INHIBITOR FROM NATURE: FUNDAMENTALS OF TANNIC ACID INHIBITION FOR AA2024 ALLOY

  • Del Olmo Martínez, Rubén
  • Bastos, Alexandre
  • Yasakau, Kiryl
  • Sushkova, Alesia
  • Arrabal Durán, Raúl
  • Tedim, João
This study addresses the fundamentals of corrosion inhibition of AA2024 alloy by tannic acid (TA), a Cr-free and eco-friendly natural product. To this end, the AA2024 alloy was immersed in NaCl solution (50 mM) with different TA concentrations (0.1–10 mM) for 7 days. Surface (SEM, Raman, and SKPFM) and electrochemical analyses (EIS, PDP, and SVET) revealed mixed inhibition after 1 day of immersion in TA solution. Long-term immersion tests in TA solutions produced a tannate-rich oxide film on the surface. The films with low tannate content (formed in 0.1 and 1 mM TA) showed the highest stability and corrosion resistance.

Proyecto: //
DOI: https://hdl.handle.net/20.500.14352/118439
Docta Complutense
oai:docta.ucm.es:20.500.14352/118439
HANDLE: https://hdl.handle.net/20.500.14352/118439
Docta Complutense
oai:docta.ucm.es:20.500.14352/118439
PMID: https://hdl.handle.net/20.500.14352/118439
Docta Complutense
oai:docta.ucm.es:20.500.14352/118439
Ver en: https://hdl.handle.net/20.500.14352/118439
Docta Complutense
oai:docta.ucm.es:20.500.14352/118439

Docta Complutense
oai:docta.ucm.es:20.500.14352/92400
Dataset. 2023

ENCUESTA SOBRE DALTONISMO EN LA FACULTAD DE BELLAS ARTES UCM Y ENTREVISTAS A ALUMNADO DALTÓNICO DEL GRADO EN BELLAS ARTES UCM,2023

SURVEY ON COLOUR BLINDNESS AT THE FACULTY OF FINE ARTS UCM AND INTERVIEWS WITH COLOUR BLIND STUDENTS OF THE DEGREE IN FINE ARTS UCM

  • Población anónima de la Facultad de Bellas Artes
  • Cuatro personas anónimas con discromatopsia, estudiantes del Grado en Bellas Artes en la Universidad Complutense de Madrid, España
  • Iribas Rudin, Ana Eva
Esta base de datos está configurada por resultados de encuesta sobre daltonismo y entrevistas a alumnado daltónico del Grado en Bellas Artes, todo dentro de la Facultad de Bellas Artes de la UCM.

Proyecto: //
DOI: https://hdl.handle.net/20.500.14352/92400
Docta Complutense
oai:docta.ucm.es:20.500.14352/92400
HANDLE: https://hdl.handle.net/20.500.14352/92400
Docta Complutense
oai:docta.ucm.es:20.500.14352/92400
PMID: https://hdl.handle.net/20.500.14352/92400
Docta Complutense
oai:docta.ucm.es:20.500.14352/92400
Ver en: https://hdl.handle.net/20.500.14352/92400
Docta Complutense
oai:docta.ucm.es:20.500.14352/92400

Docta Complutense
oai:docta.ucm.es:20.500.14352/109086
Dataset. 2024

DATOS DEL ARTÍCULO: IS THERE DIRECT PHOTOENTRAINMENT IN THE GOLDFISH LIVER? WAVELENGTH-DEPENDENT REGULATION OF CLOCK GENES AND INVESTIGATION OF THE OPSIN 7 FAMILY

  • Saiz Aparicio, Nuria
  • Alonso Gómez, Ángel Luis
  • Bustamante Martínez, Sergio
  • Pedro Ormeño, Nuria De
  • Delgado Saavedra, María Jesús
  • Isorna Alonso, Esther
Experimental data published in the article Is there direct photoentrainment in the goldfish liver? Wavelength-dependent regulation of clock genes and investigation of the Opsin 7 family, Journal of Comparative Physiology-A, 2024.

DOI: https://hdl.handle.net/20.500.14352/109086
Docta Complutense
oai:docta.ucm.es:20.500.14352/109086
HANDLE: https://hdl.handle.net/20.500.14352/109086
Docta Complutense
oai:docta.ucm.es:20.500.14352/109086
PMID: https://hdl.handle.net/20.500.14352/109086
Docta Complutense
oai:docta.ucm.es:20.500.14352/109086
Ver en: https://hdl.handle.net/20.500.14352/109086
Docta Complutense
oai:docta.ucm.es:20.500.14352/109086

Docta Complutense
oai:docta.ucm.es:20.500.14352/118658
Dataset. 2023

DATA: HYBRID PEO/SOL-GEL COATINGS LOADED WITH CE FOR CORROSION PROTECTION OF AA2024-T3

  • Del Olmo Martínez, Rubén
  • López Martínez, Esther
  • Matykina, Endzhe
  • Tiringer, Ursa
  • Mol, J.M.C.
  • Mohedano Sánchez, Marta
  • Arrabal Durán, Raúl
Plasma electrolytic oxidation (PEO) has been targeted as an eco-friendly alternative technology to conventional chromic acid anodizing (CAA) for corrosion protection of aluminium alloys in the aircraft industry. However, conventional PEO technology implies high energy consumption. Flash-PEO coatings (≤10 μm) produced in short treatment times (≤ 5 min) constitute a feasible way to overcome this limitation. Nevertheless, the long-term corrosion resistance is compromised, thus requiring novel sealing post-treatments. The present work studies the effect of stand-alone hybrid sol-gel (HSG) and Ce-doped hybrid sol-gel (HSG-Ce) coatings as a sealing post-treatment to evaluate the long-term corrosion resistance of Flash-PEO coatings on aluminium alloy (AA) 2024-T3. The characterization of the PEO, HSG, and HSG-Ce coatings was performed by scanning electron microscopy, X-ray diffraction, water contact angle, dry adhesion tests (ISO 2409), optical profilometry and Fourier transform infrared spectroscopy. The corrosion behaviour was assessed by electrochemical impedance spectroscopy up to 21 days (3.5 wt% NaCl). Active corrosion protection was assessed by immersion tests of artificially scratched coatings. Present findings reveal that low-energy-cost Flash-PEO coatings were successfully formed on AA2024-T3 alloy. Both HSG and HSG-Ce coatings were homogeneously formed on Flash PEO coating. Regarding the corrosion resistance, HSG-Ce showed significant scratch protection during 21 days of immersion in 3.5 wt% NaCl. The results suggest that, while the release of Si and Ce from the coating provided corrosion protection, nitrate release promoted localized corrosion phenomena in the scribe. This was associated with the preferential pitting corrosion phenomena at the Cu-rich intermetallic compounds instead of forming a thick and stablenitrate-rich passive layer.

DOI: https://hdl.handle.net/20.500.14352/118658
Docta Complutense
oai:docta.ucm.es:20.500.14352/118658
HANDLE: https://hdl.handle.net/20.500.14352/118658
Docta Complutense
oai:docta.ucm.es:20.500.14352/118658
PMID: https://hdl.handle.net/20.500.14352/118658
Docta Complutense
oai:docta.ucm.es:20.500.14352/118658
Ver en: https://hdl.handle.net/20.500.14352/118658
Docta Complutense
oai:docta.ucm.es:20.500.14352/118658

Docta Complutense
oai:docta.ucm.es:20.500.14352/118657
Dataset. 2024

DATA: FLASH PLASMA ELECTROLYTIC OXIDATION AND ELECTROCHEMICAL BEHAVIOUR IN PHYSIOLOGICAL MEDIA OF ADDITIVE MANUFACTURING TI6AL4V ALLOY

  • Mora Sánchez, Hugo
  • Ramos, Carolina
  • Mohedano Sánchez, Marta
  • Torres, Belén
  • Arrabal Durán, Raúl
  • Matykina, Endzhe
The objective of this work is to understand the plasma electrolytic oxidation (PEO) treatment and electrochemical behaviour of a Ti6Al4V alloy manufactured by a laser powder bed fusion additive manufacturing (AM) technique known as direct metal laser sintering (DMLS). Ca and P-containing coatings were produced with short time (<120 s) PEO treatments (also termed as Flash-PEO) obtaining 3–10 μm-thick coatings on both the AM alloy and a conventional counterpart. Subsequently, the electrochemical behaviour of the bare and treated alloys was assessed in a modified α-MEM solution via potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The fine α-lamellar microstructure of the AM alloy with small β-phase particles at the interlamellar spaces was seen to advance the onset of sparking promoting faster growth of PEO coating in comparison to the conventional alloy. Flash-PEO coatings enhanced the corrosion protection of both conventional and AM alloys, the thinnest (<3 μm) coatings providing up to three times greater protection. AM Ti6Al4V was found to be susceptible to localized crevice corrosion which could be assigned to the high grain boundary density. Flash-PEO treatments, even as short as 35 s, were sufficient to successfully prevent it.

DOI: https://hdl.handle.net/20.500.14352/118657
Docta Complutense
oai:docta.ucm.es:20.500.14352/118657
HANDLE: https://hdl.handle.net/20.500.14352/118657
Docta Complutense
oai:docta.ucm.es:20.500.14352/118657
PMID: https://hdl.handle.net/20.500.14352/118657
Docta Complutense
oai:docta.ucm.es:20.500.14352/118657
Ver en: https://hdl.handle.net/20.500.14352/118657
Docta Complutense
oai:docta.ucm.es:20.500.14352/118657

Docta Complutense
oai:docta.ucm.es:20.500.14352/112733
Dataset. 2015

CONJUNTO DE DATOS RELACIONADOS CON LA TESIS DOCTORAL DE LOS CÓDICES DIPLOMÁTICOS DENOMINADOS BECERROS. ESTUDIO Y PROPUESTA DE CORPUS DIGITAL

  • Sánchez Díez, Alicia
Conjunto de datos utilizados durante la investigación que lleva a la tesis doctoral De los códices diplomáticos denominados Becerros. Estudio y propuesta de corpus digital

Proyecto: //
DOI: https://hdl.handle.net/20.500.14352/112733
Docta Complutense
oai:docta.ucm.es:20.500.14352/112733
HANDLE: https://hdl.handle.net/20.500.14352/112733
Docta Complutense
oai:docta.ucm.es:20.500.14352/112733
PMID: https://hdl.handle.net/20.500.14352/112733
Docta Complutense
oai:docta.ucm.es:20.500.14352/112733
Ver en: https://hdl.handle.net/20.500.14352/112733
Docta Complutense
oai:docta.ucm.es:20.500.14352/112733

Docta Complutense
oai:docta.ucm.es:20.500.14352/2611
Dataset. 2023

VÍDEO IMPRESIÓN 3D PRISMA T-ORG-6.

  • Hopson Safatli, Cynthia Elizabeth
Vídeo impresión 3D prisma T-ORG-6. Adjunto de la Tesis Doctoral titulada: "Formulación de ionogeles e hidrogeles de celulosa procedente del fraccionamiento de la madera y su aplicación en la impresión 3D" de Cynthia Hopson.

Proyecto: //
DOI: https://hdl.handle.net/20.500.14352/2611
Docta Complutense
oai:docta.ucm.es:20.500.14352/2611
HANDLE: https://hdl.handle.net/20.500.14352/2611
Docta Complutense
oai:docta.ucm.es:20.500.14352/2611
PMID: https://hdl.handle.net/20.500.14352/2611
Docta Complutense
oai:docta.ucm.es:20.500.14352/2611
Ver en: https://hdl.handle.net/20.500.14352/2611
Docta Complutense
oai:docta.ucm.es:20.500.14352/2611

Docta Complutense
oai:docta.ucm.es:20.500.14352/113095
Dataset. 2021

BASE DE DATOS SUMMA SIGNUM. ESTRUCTURA Y DATOS

  • Sánchez Díez, Alicia
  • Alcázar Ruiz, Sergio
  • Pardo Elvira, Alejandro
  • Sanz Llorente, María
Base de datos SUMMA Signum. Estructura y datos de investigación utilizados durante el proyecto de investigación: El castellano norteño en la Edad Media. Estudio Lingüístico de la documentación palentina. Ministerio de Economía, Industria y Competitividad. FFI 2016-80230P

Proyecto: //
DOI: https://hdl.handle.net/20.500.14352/113095
Docta Complutense
oai:docta.ucm.es:20.500.14352/113095
HANDLE: https://hdl.handle.net/20.500.14352/113095
Docta Complutense
oai:docta.ucm.es:20.500.14352/113095
PMID: https://hdl.handle.net/20.500.14352/113095
Docta Complutense
oai:docta.ucm.es:20.500.14352/113095
Ver en: https://hdl.handle.net/20.500.14352/113095
Docta Complutense
oai:docta.ucm.es:20.500.14352/113095

Docta Complutense
oai:docta.ucm.es:20.500.14352/118654
Dataset. 2024

DATA: CORROSION OF ADDITIVELY MANUFACTURED TI6AL4V ALLOY IN SALINE AND ACIDIC MEDIA

  • Mora Sánchez, Hugo
  • Collado Vian, Miguel
  • Mohedano Sánchez, Marta
  • Arrabal Durán, Raúl
  • Matykina, Endzhe
The present work aims to provide corrosion performance data for an additively manufactured Ti6Al4V alloy in saline and polluted environments. The as-received additively manufactured material underwent heat treatment at 850 °C for 3 h to transform the acicular α’ microstructure into a lamellar α microstructure. Comparative corrosion assessments were conducted between the heat-treated substrates, the as-received condition, and a conventionally mill-annealed alloy. Potentiodynamic polarization experiments were carried out in saline (3.5 wt.% NaCl) and acid aqueous media ((NH4)2SO4 containing Harrison’s solution). The corrosion performance of additively manufactured substrates matched or surpassed that of the conventional alloy in Harrison’s solutions while remaining inferior in saline medium, despite forming a thicker passive film. Overall, the XY plane showed better corrosion performance, particularly after the elimination of the acicular α’ martensite by the applied heat treatment. The results also suggested that the presence of the coarse β phase was beneficial in 3.5 wt.% NaCl solution and detrimental in Harrison’s solutions, more so in acidified and fluorinated conditions.

DOI: https://hdl.handle.net/20.500.14352/118654
Docta Complutense
oai:docta.ucm.es:20.500.14352/118654
HANDLE: https://hdl.handle.net/20.500.14352/118654
Docta Complutense
oai:docta.ucm.es:20.500.14352/118654
PMID: https://hdl.handle.net/20.500.14352/118654
Docta Complutense
oai:docta.ucm.es:20.500.14352/118654
Ver en: https://hdl.handle.net/20.500.14352/118654
Docta Complutense
oai:docta.ucm.es:20.500.14352/118654

Docta Complutense
oai:docta.ucm.es:20.500.14352/119115
Dataset. 2025

DATA: FLASH-PEO OF MAGNESIUM: PHOSPHATE PRECURSOR DRIVEN FUNCTIONALIZATION

  • Guerra-Mutis, Marlon Hernando
  • Vega Vega, Jesus Manuel
  • Barrena Pérez, María Isabel
  • Matykina, Endzhe
  • Arrabal Durán, Raúl
In this study, a phosphate-based conversion coating (PCC) was applied as a precursor before forming silicate-fluoride (SiF) and silicate-phosphate-fluoride (SiPF) based flash-plasma electrolytic oxidation (Flash-PEO) coatings on AZ31B magnesium alloy. The main novelty is the successful incorporation of calcium, zinc, manganese and phosphate species into the Flash-PEO coatings via a precursor layer rather than using the electrolyte. The precursor also led to longer lasting and more intense discharges during the PEO process, resulting in increased pore size. Corrosion studies revealed similar short-term performance for all coatings, with impedance modulus at low frequencies above 107 Ωcm2, and slightly better performance for the SiPF-based coating. Nonetheless, the enlarged pores in the PEO coatings functionalized with the PCC precursor compromised the effectiveness of self-healing mechanisms by creating diffusion pathways for corrosive species, leading to earlier failure. These phenomena were effectively monitored by recording the open circuit potential during immersion in 0.5 wt.% NaCl solution. In summary, this study demonstrates that conversion coatings are a viable option for the functionalization of PEO coatings on magnesium alloys, as they allow for the incorporation of cationic and other species. However, it is crucial to maintain a small pore size to facilitate effective blockage through self-healing mechanisms.

DOI: https://hdl.handle.net/20.500.14352/119115
Docta Complutense
oai:docta.ucm.es:20.500.14352/119115
HANDLE: https://hdl.handle.net/20.500.14352/119115
Docta Complutense
oai:docta.ucm.es:20.500.14352/119115
PMID: https://hdl.handle.net/20.500.14352/119115
Docta Complutense
oai:docta.ucm.es:20.500.14352/119115
Ver en: https://hdl.handle.net/20.500.14352/119115
Docta Complutense
oai:docta.ucm.es:20.500.14352/119115

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