A phase field framework of elasticity, inelasticity, and fracture mechanics is invoked to study the behavior ceramic materials. Mechanisms addressed by theory include deformation twinning, dislocation slip, amorphization, anisotropic cleavage fracture. Failure along grain boundaries resolved explicitly, whereWeibull statistics are used characterize surface energies such boundaries. Residual str...

The paper studies the thermophysical properties of a Cu-Ti-C-B composite produced by self-propagating high-temperature synthesis (SHS) an initial mixture copper, titanium, boron carbide (B4C), and carbon powders. matrix is supersaturated solid solution titanium in copper lattice with Cu4Ti nanosized particles homogeneously precipitated under cooling. microhardness 450 HV 0.1. Particles (TiC) di...

A variety of superhard coatings with Vickers plastic hardness exceeding 40 GPa have been reported by several research groups during the last five years (for recent reviews see refs [1,2]). However, one has to distinguish between superhard nanocomposites, such as nc-TiN/a-Si3N4, nc-TiN/a-Si3N4/aand nc-TiSi2, nc-(Ti1-xAlx)N/a-Si3N4, nc-TiN/TiB2, ncTiN/BN, etc. where the high hardness originates f...

Abstract Titanium diboride (TiB 2 ) is considered a promising material for wettable cathodes in aluminum electrolysis. The demand associated with the development of inert anode technologies to eliminate CO emissions caused by conventional reduction process. has been given special attention due its superior properties, such as high wettability, good electrical conductivity, wear resistance, and ...

Abstract: Nano-structural synthesized materials can be fabricated utilizing intensive milling after combustion synthesis. The Al2O3-TiB2 ceramic composite has been synthesized by aluminothermic reactions between Al, Ti (TiO2), and B (B2O3 or H3BO3). Boric acid (H3BO3) is less expensive than boron oxide, and after being dehydrated at 200°C, boron oxide will be obtained. In this study, Al, TiO2, ...