Esta tesis doctoral comprende una serie de artículos enfocados en la fabricación de materiales cerámicos (principalmente alúmina, pero también circona) reforzados con nanofases de carbono (grafeno y nanotubos de carbono). La base de la tesis consiste en la preparación de cerámicas avanzadas mediante la técnica sol-gel, y su caracterización...
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July 12, 2023 (v1)PublicationUploaded on: July 13, 2023
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March 18, 2022 (v1)Publication
In this work, a procedure for fabricating porous alumina with the use of a carbon sacrificial template has been tested in order to optimize the fabrication of porous structures mimicking the porosity and mechanical properties of the human cortical bone. Two different sources of sacrificial carbon were used and compared, and different sintering...
Uploaded on: March 25, 2023 -
October 27, 2022 (v1)Publication
In this work, the crystal evolution of α-Al2O3 composites reinforced with LBA platelets were monitored by XRD Rietveld. In addition, the mechanical properties of totally densified specimens were researched by Vickers and Knoop indentations. These composite materials were prepared by a sol-gel process from alumina seeded boehmite sol and...
Uploaded on: December 4, 2022 -
March 4, 2021 (v1)Publication
This paper aims to give an answer to the following question: is the oxidation of graphene a critical issue for high-temperature plasticity in graphene-reinforced ceramics? To give a convincing reply, we will focus on two very different graphene-based ceramic composites: reduced graphene oxide (rGO)-reinforced alumina (α-Al2O3) and reduced...
Uploaded on: December 4, 2022 -
October 19, 2022 (v1)Publication
This work presents a fast and direct controlled routine for the fabrication of fully dense alumina based on the reactive spark plasma sintering (reactive-SPS) of boehmite (γ-AlOOH) nano-powders obtained by the sol–gel technique. The evolution of the transition aluminas during sintering has been studied. Some boehmite powders were seeded with...
Uploaded on: December 4, 2022 -
March 27, 2020 (v1)Publication
The traditional methods for the synthesis of reinforced alumina-based matrix composites with carbon nanotubes (CNTs) have presented serious difficulties for obtaining well-dispersed and homogeneously distributed CNTs within the matrix. Besides this, the CNTs are typically found in the grain boundaries of the matrix. These features involve a...
Uploaded on: December 4, 2022 -
September 17, 2020 (v1)Publication
Multiwalled carbon nanotubes (MWCNTs) have been widely considered for mechanical reinforcement of ceramic matrix composites. Nevertheless, the efficiency of this reinforcement strategy is under debate due to fabrication issues, such as a good homogenization or the location of the MWCNTs inside the matrix composite. Regarding this, the...
Uploaded on: December 5, 2022