Ceramic macro-needles incorporation as reinforcement in commercial refractory castable was studied. (Ø2x20 mm) were made from kaolinite clay and gibbsite to obtain mullite the main crystalline phase. Specimens with ceramic evaluated by compression after being treated at two temperatures (815 1400 °C). The results compared those obtained using same concrete but reinforced steel fibers without re...

The purpose of this paper is to examine the piston stress distribution using several thicknesses of the coating materials to achieve higher gasoline engine performance. First of all, finite element structure analysis is used to uncoated petrol piston made of aluminum alloy. Then, steel and cast iron piston materials are conducted and compared with the aluminum piston. After that, investigation ...

Thin compressive layers within a laminar ceramic arrest large cracks (surface and internal) and produce a threshold strength. This phenomenon increases the damage tolerance of ceramics and will allow engineers to design reliable ceramic components for structural applications. The stress intensity factor derived for a crack sandwiched between two compressive layers suggests that the threshold st...

The effect of particle size and sintering temperature the mixtures kyanite metallic aluminum related to thermal transformation into primary mullite free silica was studied. In addition, reaction between ?-Al2O3 (in situ produced by oxidation) obtained in cristobalite structure from obtain secondary mullite. powders were milled 0.5, 3, 6, 12 hours then mixed with powder, which previously 3 hours...

Corrosion resistance of zircon reinforced alumina refractories has been carried out through static crucible test. The corrosion measurements with percentage, the penetration depth of molten steel and the microstructure of the refractories were evaluated after soaking 150 h at the temperature of 1500˚C. Results showed that the corrosion resistance of alumina increased by adding 20 wt% zirc...