Paper Details

Ceramic matrix composites are materials in which one or more distinct ceramic phases are intentionallyadded to another, in order to enhance some property that is not possessed by the monolithic ceramic materials. Inceramic matrix composites, a given ceramic matrix is reinforced with either discontinuous reinforcement, such asparticles, whiskers or chopped fibers or with continuous fibers. The basic reinforcements which are included in theceramic matrices are carbon, glasses, glass-ceramics, oxides and non-oxides. The main function of the matrix is to keepthe reinforcing phase in the desired orientation or location and act as a load transfer media as well as protectreinforcement from the environment. Whereas, the primary aim of the reinforcement is to provide toughness to anotherwise brittle matrix. Filler materials in particle form are also sometimes added to the matrix materials during theprocessing of CMCs to enhance the properties such as electrical conductivity, thermal conductivity, thermal expansionand hardness. Particles with different shapes such as spherical, irregular and faceted are commonly used during theprocessing of CMCs. Ceramic matrix composites (CMCs) can be processed either by conventional powder processingtechnique or by other more specific and customized techniques. The processing temperature for CMCs is extremely highcompared to polymer or metal matrix composites which leads to a very difficult and expensive processing. Moreover,ceramic matrix composites are widely used in several engineering applications such as in heat shield systems, gasturbines components such as combustion chambers, stator vanes and turbine blades, rocket engines, components forburners, flame holders, hot gas ducts, brake disks and brake system components for airplanes or cars which experienceextreme thermal shock, bearing components that necessitate high corrosion and wear resistance. Ceramic materialspossess high strength and modulus at elevated temperature. But their use as structural components is severely limitedbecause of their brittleness. The continuous fiber rein forced ceramic-matrix composites (CMCs),by incorporating fibersin ceramic matrices, however, not only exploit their attractive high-temperature strength but also reduce the propensityfor catastrophic failure. In this paper presents an over view and study on ceramic matrix composites of the role ofoxidation in time-dependent response, properties of hexagonal boron nitride and fatigue behaviour of SiC composites

K.Sirisha, Dr.R.Uday Kumar, “AN OVERVIEW OF CERAMIC MATRIX COMPOSITES”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 4, Issue 5, pp. 307-312, May 2017.