This paper focused on the characterization of composites containing nickel aluminate spinel from Al2O3/NiO and Al2O3/Ni systems. The were prepared by die pressing powders subsequent sintering green bodies in air atmosphere. Composites characterized XRD, SEM, EDS DTA/TG/MS analyses. physical properties measured Archimedes method. Quantitative description microstructure was made basis SEM images using computer image analysis. XRD studies observations confirmed presence two phases Al2O3 NiAl2O4...

Alumina-nickel composite samples (with 0, 10 and 20 vol.% of Ni) are prepared via slip casting method. Nickel aluminium oxide powders were used as precursors diammonium hydrocitrate citric acid dispersants. The obtained materials analysed by dilatometry, X-ray diffraction SEM. densities measured Archimedes method the hardness fracture toughness determined using Vickers tester. Special attention was paid to linear shrinkage effective coefficient thermal expansion measurements. curves...

The main advantage of ceramic-metal composites is the increase fracture toughness brittle ceramic matrix.The slip casting method gives possibility to obtain products complicated shapes without green machining.In work results concerning colloidal and rheological aspects composite fabrication via are presented.Slurry consisted (α-Al 2 O 3 ) nickel powder suspended in water with addition deflocculants composition (citric acid diammonium citrate), surface-active agents binder.Ceramic metallic...

The paper is focused on the possibility of fabricating alumina matrix ceramic-nickel composites with gradient concentration metal particles. Centrifugal slip casting method was chosen for composite fabrication. This allows fabrication graded distribution nickel particles in hollow cylinder composites. horizontal rotation axis applied. samples were characterized by XRD, SEM and quantitative description microstructure. macroscopic as well observations prepared confirmed Ni materials....

The fabrication and the characterization of Al2O3/Ni composites with a gradient distribution Ni particles are reported. have been obtained by centrifugal-slip casting subsequent sintering had shape hollow cylinder. TG/DTA analysis was done for nickel powder addition dispersant used in as well composite green body. measurements were performed two atmospheres: argon mixture hydrogen (1:1). Additionally, coupling thermobalance mass spectrometer allowed to determine type gases released from...

Abstract Slip casting is one of the most popular shaping method in ceramic technology which allows producing a large number elements small period time. This technique gives possibility to fabricate or composite materials such as ZrO 2 -Ti. Ti with its properties (low density, high melting point, high-temperature strength, good corrosion resistance and others) combine (high flexure compression very K IC ) can be considered for different applications constructional functional materials. For...

This paper presents some examples of ceramic matrix composites (CMCs) reinforced with metal or intermetallic phases fabricated by powder consolidation without a liquid phase (melted metal). Composites complex structure, which are an advanced group CMCs called hybrid composites, were described in contrast to conventional matrix. In CMCs, their structures make it possible achieve the synergistic effect micro- and nanoparticles metallic, intermetallic, on composite properties, is not materials....

This study investigates the influence of a magnetic field on microstructure and properties Al2O3-Ni composites fabricated via centrifugal slip casting at 1500 rpm. Al2O3 Ni powders were combined with water deflocculants, homogenized, then cast into porous plaster mold surrounded by Nd-Fe-B magnets. The resulting composites, sintered in reducing atmosphere, exhibited three-zone structure varying content due to effects force. SEM, EDX, XRD analyses confirmed distribution composition phases....

This paper focuses on a research the influence of nickel content in zirconia matrix and its impact mechanical properties obtained composites. ZrO2/Ni mixed powders were uniaxially pressed sintered nitrogen atmosphere to obtain composites that characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive spectroscopy (EDS). The stereological analysis allows obtaining information about size distribution grains Relative density, hardness, fracture toughness,...

In this work, an alumina-nickel graded hollow cylinders were prepared by the centrifugal slip casting. paper, results for samples formed from slurries with different solid content: 45 vol.%, 40 vol.% and 35 are presented. The structure of after sintering was examined X-ray diffraction (XRD). microstructure composite, especially nickel particle size distributions investigated using scanning electron microscopy (SEM). An image analyzer has been used measurement volume fraction particles in...

This paper focuses on the possibility of adapting centrifugal slip casting method to obtain zirconia–alumina composite materials in form finished tube-shaped products. These types products, due their unique properties, can be utilised, for example, transport aggressive substances, even extreme temperatures or corrosive conditions. The study reports two series composites differing content ZrO2—2.5 and 25 vol%. fabricated sintered were characterised using scanning electron microscopy (SEM),...