In this study, B4C+SiC/B4C +TiB2/SiC+TiB2 hybrid reinforcements were added to Al 7075 matrix via the powder metallurgy method. The powders subjected mechanical grinding for 240 min, as shown in graphical abstract. composite structure produced by was then placed a vertical casting chamber and molten (main matrix) obtain samples. Samples dissolved 1 h at 480 ?C, aged 120 ?C 4-h increments (32 tot...

Bulk Cu-Ti alloy reinforced by TiB2 nano particles was prepared using in-situ reaction between Cu3.4wt.% Ti and Cu-0.7wt.% B along with rapid solidification and subsequent heat treatment for 1-10 hrs at 900oC. High-resolution transmission electron microscopy (HRTEM) characterization showed that primary TiB2 nano particles and TiB whiskers were formed by in-situ reaction between Ti and B in the ...

In order to improve the mechanical properties of B4C ceramics, B4C@TiB2 composite powders with core-shell structure are prepared by molten salt method using and Ti as raw materials. And ceramics were from spark plasma sintering (SPS). The results show that exhibit intact structure. improves mass transfer during sintering. When molar ratio B4C/Ti is 2/1, relative density, Vickers hardness, fract...

Hybrid nanofluids aim to further improve the characteristics of mono nanofluids. However, experimental studies that jointly explore physical properties hybrids and corresponding are missing. In this work, B4C TiB2 hybrid TiB2:B4C nanoadditives used for first time design based on propylene glycol:water 20:80 wt%. The density, isobaric heat capacity, thermal conductivity determined by oscillating...

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...

13. ABSTRACT (Maximum 200 words) Prompted by the prediction of Cohen and coworkers that beta carbon nitride may have properties similar to diamond, there have been many attempts to synthesize this hypothetical metastable material. We successfully synthesized this material via epitaxial stabilization using TiN(lll) and ZrN(lll) as the growth template. The coatings were CN/TiN or CN/ZrN multilaye...

Nanocomposite of titanium diboride/titanium carbide was fabricated by combustion synthesis of mechanically milled reactant powders. The stoichiometric mixture of Ti and B4C as starting materials milled for 1, 3, 6 and 9 h. Milled powders pressed to form pellets then green compacts were placed in a tube furnace that preheated to 1100 oC in inert atmosphere (Ar).The samples were investigated by X...