Reactive infiltration processing was used to fabricate bulk NiAl and fiber-reinforced NiAl composites. Homogenous, pore-free materials were obtained by chemical reaction between nickel and aluminum after complete infiltration with liquid aluminum of preforms of nickel wires (containing tungsten wires for the composites) with low surface-to-volume ratio, high permeability, and regular infiltrati...

Composites based on Al-Mg alloy, reinforced with graphene nanofilms, were obtained by in situ synthesis under a layer of salt melt. Using SEM and HRTEM, the morphological dimensional characteristics structural components composites different contents studied. An experiment dynamic compression Kolsky method was carried out, properties measured, evolution cast structure during high-speed deformat...

Objective: Determine the translucency and radiopacity of five commercially availablecomposites: Aelite LS(AE), Filtek LS(FS), GC Kalore(KA), Empress DirectEnamel(EE), Empress Direct Dentin(ED)Experimental Methods: Experiment conducted according to ISO guideline 4049.Five composites(n=50), shade A2, were packed into an aluminum mold(10-mm diameter,1-mm thick) and light cu...

gears are one of the most critical components in power transmission system of an automobile and also many rotating machinery. many studies have been conducted on optimum gear design. the main objective is to design different aluminium metal matrix composite spur gears before and after optimization. aluminium metal matrix material composites are preferred mostly due to their low density. also th...

The process of the production a CF/Al-wire by pulling carbon fibers through an aluminum melt has at least 15 parameters. main parameters include power ultrasonic treatment, time contact fiber with matrix melt, and temperature. In addition, presence barrier coating on surface its thickness significantly affects properties resulting material. importance these is due to their direct effect chemica...

the use of methods employed for estimating the strength and toughness of composites reduces the trial-and-error in their design. the strength of interface between reinforcement and matrix and the effective surface of pulled-out particles have great influences on toughness and strength of these composites. in this study, a model was proposed to estimate the interface strength and matrix strength...

Polymer modified fillers in composites has attracted the attention of numerous researchers. These fillers are composed of core-shell structures that exhibit enhanced physical and chemical properties that are associated with shell surface control and encapsulated core materials. In this study, we have described an apt method to prepare polyimide (PI)-modified aluminum nitride (AlN) fillers, AlN@...

In-situ aluminum matrix composite is the innovation of high performance material technology and it has superior interfacial integrity and thermodynamic stability between the matrix and reinforcement. During synthesis, the ZrB2 particle is formed by exothermic reaction within the aluminum melt. As a result, small, fine and oxide free reinforcements are formed. Excessive temperature released from...

combustion synthesis has been used to produce fe-(ti,w)c composites. a simple reactor was designed which made it possible to ignite the samples under controlled atmosphere. samples with different w/ti ratio were ingnited under argon atmosphere by an electric arc and a self-propagating reaction was initiated in each sample. different composites such as wc in fe-ti matrix, wc+(ti,w)c in fe matrix...

Carbon fibers/polymer matrix composites tend to be used more widely instead of aluminum structures in the aircraft and aerospace industry. There are many reasons that explain the increasing interest for this class of composites due to the lightweight, high strength, high stiffness, good fatigue life, excellent corrosion resistance and low cost manufacturing. Moreover, a considerable effort is p...