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Showing 1 to 20 of 30 for “"TiB2"”.
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Acid Leaching of SHS Produced MgO/TiB2
… the acid leaching of SHS produced MgO/TiB2 and a stoichiometric mixture of commercial MgO and TiB₂ powders. Leaching was conducted at 90° C, 60° C, and 30° C at pH levels of 4.0, 2.5, and 1.0 by introduction of concentrated aliquots of HNO₃. This method maintains a minimum pH target …
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Nanostructuring of Cu-TiB2 induced by ion irradiation
… involving the precipitation of compounds. The Cu-TiB2 alloy system was selected and microstructural evolutions induced by 1.8 MeV Kr ion irradiation with varying fluence and wide range of temperatures were investigated. An additional objective was to identify the mode of formation of these …
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Ultrasound assisted low-temperature synthesis of TiB2 and Al3Ti particulates in molten aluminum
<p>In situ formed TiB<sub>2</sub> and Al<sub>3</sub>Ti are two typical representatives of ceramic and intermetallic reinforcements in the in situ particulate reinforced Al composites. TiB<sub>2</sub> particulates can be synthesized in molten Al via the mixed-salts reaction by adding mixed …
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Effect of Processing Parameters on Bond Strength and Effective Plasticity in Al2O3-TiB2 Composites
Alumina-titanium diboride (Al2O3-TiB2) composites have high temperature, wear, and impact resistance that could be useful in high performance applications. Determining the effect of processing parameters on relative bond strength and effective plasticity may contribute to optimization and …
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Development of ADC14 hypereutectic ALSi alloy based composite reinforced with SiC , Al2O3 and TiB2 through stir casting
… of common reinforcement materials (SiC, Al2O3, TiB2) in hypereutectic AlSi alloy will improve mechanical properties. Thus, in this research work, ADC14 hypereutectic AlSi alloy based composite reinforced with SiC (5 to 20%), Al2O3 (5 to 15%) and TiB2 (2 to 8%) was developed through stir casting. …
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SYNTHESIS, PROCESSING, AND CHARACTERIZATION OF TITANIUM CARBIDE AND TITANIUM DIBORIDE BASED MATERIALS FOR STRUCTURAL AND ELECTRONIC APPLICATION
… of titanium carbide (TiC) and titanium diboride (TiB2) based materials for structural and electronic application. A series of TiB2 and TiC-TiB2 powders was prepared through a novel carbon coated precursors method. Reaction process, phase evolution, and microstructures were analyzed and …
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Aligned Continuous Cylindrical Pores Derived from Electrospun Polymer Fibers in Titanium Diboride
… porous structures in titanium diboride (TiB2) is investigated in this work. The introduction of electrospun PS fibers as a sacrificial filler into a colloidal suspension of TiB2 allows for easy control over the pore size, porosity, and long range ordering of the porous structures of the …
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Understanding How Tape Casting Titanium Diboride Shifts its Processing-Microstructure-Properties Paradigm Toward New Applications
… aerospace. One of the UHTCs, titanium diboride (TiB2) exhibits high electrical and thermal conductivity that could satisfy the needs of functional ceramic component applications, like battery cathodes, by tailoring its microstructure and architecture. This thesis represents one of the first …
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Pressureless Densification of Alumina - Titanium Diboride Ceramic Matrix Composites
… for densification behavior of SHS produced Al2O3/TiB2 Ceramic Matrix Composites (CMCs). Previous research has shown SHS produced Al₂O₃/TiB₂ composites exhibited unique microstructural properties that contributed to high strength, fracture toughness, and hardness properties. Pressureless …
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Codeformation Processing of Mechanically-Dissimilar Metal/Intermetallic Composites
… to increase with increasing volume percentage of TiB2 reinforcement. Further, this temperature has been shown to effect the size and spacing of the TiB2, microstructural features which are often used in discontinuous composite strength models. Study of the high temperature flow behavior of the …
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Preparation and characterisation of inorganic nanostructured support materials for polymer electrolyte fuel cells
… PEFC applications. This material consisted of TiB2 electrospun nanofibers, powder and crushed electrospun nanofibers. Methods used to reliably and accurately deposit Pt onto these materials were identified, developed and analysed. These methods include platinum deposited onto TiB2 powder, …
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Novel Micropatterned Substrate for Investigation of Ovarian Cancer Aggregate Formation and Response to Epigenetic Drug Therapy
… titanium diboride etched on a silicon wafer (Si-TiB2). TiB2 micropatterns on the Si background establish stiffness, roughness, wetness, and charge gradients to induce selective deposition of growth factors, enabling self-assembly of cells into 3D aggregates. OVCAR3 and SKOV3 cell lines were used …
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Production of steel matrix composites by mechanical milling and spark plasma sintering
… speed steel (HSS) and different ceramic powders (TiB2, TiC and TiN) have been selected. The production of HWTS/HSS blends has highlighted the negative interaction on densification of the two components due to their different sintering kinetics. This interference can be minimised by selecting …
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Magnesium Diboride Superconducting Devices and Circuits
… sandwich-type Josephson junctions (one with TiB2 normal conducting barrier and another with an MgO insulating barrier). The junction MgB2 films were deposited by hyprid physical-vapor deposition and the junction barrier were deposited by sputtering. The junctions were patterned and etched …
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Manufacturing and properties of titanium-based materials produced by selective laser melting
… Ti-TiB composites from optimally milled Ti-TiB2 powder. X-ray and electron diffraction patterns as well as microstructural investigations indicated a chemical reaction during SLM in which irregular-shape titanium diboride (TiB2) particles react with pure Ti to form needle-shape TiB …
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NOVEL NANOMATERIALS FOR ENERGY RELATED APPLICATIONS
… properties of HVOF thermal spray of TiC and TiB2 coatings on 304H stainless steel, 430, and P91 steels were reported. The coatings successfully served at a protection layer by limiting oxygen penetration, sulfur attack, and decreased the formation of pits and cracks on the substrates at 750°C …
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Optical combustion measurements of novel energetic materials in a heterogeneous shock tube
… or the intermetallic reaction producing TiB2. It is capable of generating long lasting high temperature fireballs after the initial blast, which is ideal for defeating biological weapons. The Al-I2 system is similarly suited for the defeat of biological weapons due to high combustion …
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Production of strengthened copper materials by Mechanical Milling-Mechanical Alloying and Spark Plasma Sintering
… of MMC a ceramic reinforcement (0.5wt% of TiB2) has been selected. Increasing milling time the dispersion of the hard phase among the matrix becomes more homogeneous and refinement of TiB2 is highlighted. The evolution of particle size and morphology during MA is similar to MM; also the …
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Synthesis and characterization of ceramics in the Ti-B-N-C system
… the present work is aimed at the production of TiB2 powders. Aspects of the formation of two or three ceramic phase mixtures were also examined together with the relative stability of the single phase mixed diborides with respect to pure diboride phase. The central aim of this part is to …
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The machinability of a gamma titanium aluminide intermetallic
… against other -TiAl (Ti-45Al-2Mn-2Nb +0.8%vol. TiB2), burn resistant and conventional titanium (Ti-6Al-4V) alloys was also performed. Full and fractional factorial (Taguchi) experimental designs were employed to identify the effect of key operating factors and levels on output measures (tool …
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