A base aluminium-silicon alloy AlSi25Cu5Cr was used to investigate the possibility of alloying aluminium alloys with hard-to-melt elements. The elements Co, Cr and Mo were introduced into melt using metal powder from a hard-melting dental cobalt-chromium-molybdenum alloy. packed in foil studied at temperature 810º C. After mechanical stirring melt, it stood for 30 min. temperature, raised 850º ...

Abstract Aluminium matrix composites (AMCs) have evolved itself in recent times as a source material for automotive applications, spacecraft electronics applications and sports accessories applications. The reason these numerous is their alterable mechanical properties such good strength-weight ratio, better stiffness, excellent resistance to wear, precise co-efficient of thermal expansion, imp...

Microcapsules of melamine formaldehyde-coated shellac and waterborne coating were prepared by in situ polymerization at 400, 600, 800 1000 rpm. The microcapsules four different stirring rates added into the primer a concentration 5.0%, 10.0%, 15.0%, 20.0% 25.0%. effects paint film on optical, mechanical liquid resistance properties investigated. results showed that comprehensive performance Til...

This paper presents an investigation of the effect graphene nanoparticles on mechanical properties glass fiber reinforced epoxy composite. The composites were fabricated using vacuum infusing molding. Dispersion nanoplatelets was done bath sonicator and stirring. physical examined according to ASTM standards. Results showed that there a significant improvement in tensile flexural by addition 0....

By changing the temperature, pH, stirring rate, or time for calcium carbonate crystallization, complex shapes of aggregated calcium carbonates formed. Such shapes have earlier been ascribed to specific interactions with specialized additives. Without polymeric additives, aggregates of vaterite transformed more rapidly into calcite aggregates under slow than under fast stirring. With an anionic ...

A method of visualizing and characterizing stirring structures of high Rayleigh number geophysical flows whose time dependence is strongly aperiodic is presented. To this end, the system is leaked by defining a smaller region of the flow, so that a particle is considered to be escaped if it enters this region. By means of an ensemble of nonescaped tracers, we are able to characterize stirring a...