We demonstrate a route to synthesize ultra high-temperature ceramic coatings of ZrB2 at temperatures below 1,300 K using Zr/B reactive multilayers. Highly textured crystalline ZrB2 is formed at modest temperatures, because of the absence of any oxide at the interface between Zr and B, and the very short diffusion distance that is inherent to the multilayer geometry. The kinetics of the ZrB2 for...

Dealing with high-temperature properties and brittleness is always one of the hot topics in field ceramic materials. Extensive research has been carried out for it Si3N4-SiC composites are most promising composites. In this study, impact Si3N4 BN reinforcement on microstructure physio-mechanical SiC-based were explored. Two sets composites, including BN-Si3N4-SiC aided Al2O3, fabricated using n...

This study focuses on a comparative analysis of mechanical behavior and microstructural characteristics Cu matrix (C87600) based hybrid composites reinforced with SiC-Grp WC-Grp fabricated by the stir casting process. The graphite particle percentage was kept constant, whereas content SiC WC in respective varied to analyze properties composites. morphological observation carried out field emiss...

A critical analysis is presented of the operating temperature windows for nine candidate fusion reactor structural materials: four reduced-activation structural materials (oxide-dispersion-strengthened and ferritic/martensitic steels containing 8–12%Cr, V–4Cr–4Ti, and SiC/SiC composites), copper-base alloys (CuNiBe), tantalum-base alloys (e.g. Ta–8W–2Hf), niobium alloys (Nb–1Zr), and molybdenum...

Silicon carbide (SiC) possesses excellent radiation tolerance, thus, SiC and its composites are promising materials for current and future nuclear systems [1]. However, the atomistic processes that underlie the irradiation response are not sufficiently understood, due largely to the limited spatial resolution of conventional analytical tools. Comparing aberration-corrected scanning transmission...

Co-Continuous Ceramic Composites, referred to as C4, have bi-continuous, interconnected and interpenetrating phases of a metal and ceramic. This bestows such composites with a higher strength to weight ratio compared with traditional composites. In this research work, a C4 composite of AA5083/SiC is fabricated for personal body armour, using gravity infiltration technique. A numerical simulatio...

The wear resistance of microfilled and conventional composite resins, was examined, using two sizes of abrasive particles for polishing. The mechanical properties of the composite resins were also studied and evaluated in relation to wear. Conventional composites showed much lower wear resistance than the microfilled resins. The amalgam and human enamel abraded with 10ƒÊm SiC particles, had str...

Quantum molecular dynamics simulations of α-Al2O3(0001)/3C-SiC(111) interfaces reveal profound effects of thermal annealing for producing strong interfaces consisting solely of cation-anion bonds and their consequence on interfacial structures. A Si-terminated SiC surface and Al2O3 form a stronger interface (Si-interface) with a Si-O bond density of 12.2  nm(-2), whereas the C interface has an ...