0000000000269416

AUTHOR

Amparo Borrell

0000-0003-4292-4538

showing 3 related works from this author

ZrTiO4 materials obtained by spark plasma reaction-sintering

2014

Zirconium titanate (ZrTiO4), have many attractive properties such as high resistivity, high dielectric constant, high permittivity at microwave frequencies and excellent temperature stability for microwave properties. Zirconium titanate dense materials are proposed for many structural applications, but fully reacted and completely dense pieces are difficult to obtain by conventional routes. In this work, fully dense zirconium titanate materials (∼98%) were obtained at lower temperatures (1300-1400 C) and short processing time by non-conventional technique; spark plasma-reaction sintering (SPRS). Homogeneous and stable starting powders mixture with the adequate composition was prepared from …

PermittivityWork (thermodynamics)Materials scienceMechanical EngineeringCeramic-matrix compositesSinteringMechanical propertiesRaw materialMicrostructureIndustrial and Manufacturing EngineeringFlexural strengthSinteringMechanics of MaterialsCIENCIA DE LOS MATERIALES E INGENIERIA METALURGICACeramics and CompositesCeramic-matrix composites (CMCs)Composite materialMicrostructureMicrowaveHigh-κ dielectric
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Microstructure and mechanical effects of spark plasma sintering in alumina monolithic ceramics

2013

The specific effects of spark plasma sintering (SPS) on the creep behavior, microstructure and mechanical properties of alumina monolithic ceramic were investigated. SPS introduces strains that concentrate at grain boundaries and inhibit crack growth, resulting in an improvement in the flexural strength and fracture toughness. However, creep blocks grain boundary movements and decreases the reliability of the material. These strains can be removed by a post-sintering thermal treatment, which plays an important role in the distribution of dislocations.

CeramicsMaterials scienceSpark plasma sinteringDislocationsMechanical propertiesThermal treatmentFracture toughnessFlexural strengthCIENCIA DE LOS MATERIALES E INGENIERIA METALURGICAGeneral Materials ScienceCeramicComposite materialMechanical EngineeringfungiMetals and Alloystechnology industry and agriculturefood and beveragesCondensed Matter PhysicsMicrostructureequipment and suppliesCreepMechanics of Materialsvisual_artvisual_art.visual_art_mediumGrain boundaryHigh-temperature deformationTransmission electron microscopy
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Microstructure and mechanical properties of plasma spraying coatings from YSZ feedstocks comprising nano-and submicron-sized particles

2015

Atmospheric plasma spraying (APS) is an attractive technique to obtain nanostructured coatings due to its versatility, simplicity and relatively low cost. However, nanoparticles cannot be fed into the plasma using conventional feeding systems, due to their low mass and poor flowability, and must be adequately reconstituted into sprayable micrometric agglomerates. In this work, nanostructured and submicron/nanostiuctured powders of yttria-stabilised zirconia (YSZ) were deposited using APS, with a view to obtaining high-performance thermal bather coatings (IBC). All powders were reconstituted by spray-drying from different solid loading suspensions, followed by a thermal treatment of the spra…

Materials scienceProcess Chemistry and TechnologyYSZ coatingsMicrostructureEngineering physicsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsRegional developmentCIENCIA DE LOS MATERIALES E INGENIERIA METALURGICAAtmospheric plasma sprayingThermal barrier coatingsNano-Materials ChemistryCeramics and CompositesChristian ministryComposite materialReconstituted powders
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