Advantages And Disadvantages Of Metal Matrix Composites

However, the absence of plastic deformation does not mean that composites are brittle materials like monolithic ceramics. The heterogeneous nature of composites result in complex failure mechanisms which impart toughness. Fiber-reinforced materials have been found to produce durable, reliable structural components in countless applications. The unique characteristic of composite materials, especially anisotropy, require the use of special design

Aluminium (AL) alloy 6061 is one of the most extensively used of the 6000 series aluminium alloys. Among the various useful aluminium alloys, aluminium alloy 6061 is typically characterized by properties such as fluidity, cast ability, corrosion resistance and high strength-weight ratio. Aluminium-based alloy MMCs has received increasing attention in recent decades as engineering applications. This alloy has been commonly used as a base metal for MMCs reinforced with a variety of fibres, particles and whiskers. Tungsten carbide (WC) is approximately two times stiffer than steel, with a Young's modulus of approximately 550GPa, and is much denser than steel or titanium.

What do you get when you mix tin together with other metals such as copper, antimony, or lead? You get this highly malleable, metal alloy. This material was in use as far back as ancient Egypt, and it has found itself recast (and recast, and recast) throughout history. In fact, that is one of the main features of this versatile metal, it is not too terribly difficult to melt down and reform into a new object.

Composite materials have been evaluated with a matrix properties unsaturated polyester resin by conducting mechanical testing, including the pressure, compression, hardness and impact resistance.. While wood flour helped add to the balance between the original compression strength reductions up to 3 wt. wood flour and then reduce the strength. The results confirmed that the best promote and 3% by weight of wood flour consider the compression strength

Polymer Matrix Composites: Most commonly used matrix materials are polymeric. In general the mechanical properties of polymers are inadequate for many structural purposes. In particular their strength and stiffness are low compared to metals and ceramics. These difficulties are overcome by reinforcing other materials with polymers. Secondly the processing of polymer matrix composites need not involve high pressure and doesn’t require high temperature. Also equipments required for manufacturing polymer matrix composites are simpler. For this reason polymer matrix composites developed rapidly and soon became popular for structural

Composites, is a material that made with two or more different material. People can see or use it anytime, anywhere. Composite materials can provide different advantages from mixing different materials, and usually combined metal (aluminum), polymers (epoxy) or ceramic (silicon). One of the most common example for the composites will be fishing rod. Nowadays fishing rod usually make with glass fiber/ carbon fiber and epoxy. Which glass fiber or carbon fiber are brittle but strong, and epoxy can provide a high mechanical properties. Result of the fishing rod can be have a better toughness, and lightweight. Because of that in this lab, the main objective is going to use the optical microscopy and find out the fiber’s alignment, the structure pattern and the mechanical properties from the fishing rod.

Composite materials are multiphase materials obtained through the artificial combination of different materials in order to attain properties that the individual components by themselves cannot attain. They are not multiphase materials in which the different phases are formed naturally by reactions, phase transformations, or other phenomena. An example is carbon fiber reinforced polymer. Composite materials should be distinguished from alloys, which can comprise two more components but are formed naturally through processes such as casting. Composite materials can be tailored for various properties by appropriately choosing their components, their proportions, their distributions, their morphologies, their degrees of crystallinity, their crystallographic textures, as well as the structure and composition of the interface between components. Due to this strong tailor ability, composite materials can be designed to satisfy the needs of

In today's commercial aviation world, airlines have for a long time understood the importance of flying an aircraft as economically as possible. Advances in technology have made this possible in a number of ways, one of which is the introduction of composite material use wherever feasible. Composite materials typically offer a weight saving of between 20 and 25% when used in place of historically manufactured components made predominantly from alloyed metals. The heavier the aircraft, the more fuel it burns for a given mission, making weight reduction top priority for aircraft designers. The non-corrosive benefits, high-energy absorption and resistance to fatigue offered by composites are another attractive feature, but despite this and

The objectives are to understand how aircraft structures are changing from metal to composite parts. This is caused by latest technology and new requirements from aircraft users. With new capabilities in materials, composites in aircraft structures remain still in the beginning stages however over time composite structure will be developed for additional purposes.

Tensile test for composites was conducted according to ASTM D 638 - 99, with a Universal Testing Machine (Zwick Co.). Tensile test was carried out at crosshead speed of 50mm/min at room temperature.

Dispersion strengthening usually design in nuclear power plants , hypersonic aircraft , and space vehicles are continually seeking materials that have high strength at elevated temperature . These requirements have been met in part by the precipitation-strengthened “supperalloys” that are suitable for application up to around 1800°F . The refractory metals , tungsten , molybdenum , columbium , and tantalum , may sometimes be used when the service temperature exceeds the useful temperature of the super alloys . However , the refractory metals are expensive , difficult to fabricate , and have poor resistance to oxidation . There is a limit to which one can extend the service temperature by precipitation strengthening . In

The major step of composite in automotive business is extension of use in to truly structural application such as primary body structure and to chassis and suspension system. These are the area which has to sustain all major road load

Prediction of failure in composite materials can be done by implementing failure theories [40-44]. The failure criteria’s are not just for

Because of the unlimited number of matrix/ fiber combinations that can be used to form composites, and the great number of variables that can be controlled in composite materials, composites can attain a wide range of mechanical properties. For instance, the mechanical properties depend on the properties of both the matrix and the fiber phases; as that, the

The physical and mechanical properties of the composites are determined by the fiber/matrix interface. By chemical treatments such as dewaxing, mercerization, bleaching, cyanoethylation, silane treatment, benzoylation, peroxide treatment, isocyanate treatment, acrylation, acetylation, latex coating, steam-explosion, etc. the interfacial properties can be improved [34,