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illustrate process of extrusion in this process a round heated billet of metal which is placed in a container is forced out through a die in a press
state the functions of oxide layeri to mask against diffusion or ion-implantii to passivate surface electrically and chemicallyiii to isolate one
determine about the silicon silicon has a unique ability to be oxidized into silica that produces a chemically stable protective and insulating layer
what are the disadvantages of cold workingi higher forces are required for deformationii heavier and more powerful equipment is requirediii may
what are the advantages of cold workingi no heat is requiredii better surface finish is obtainediii superior dimension controliv improved strength
what is the foundation of classification of cold and hot working cold and hot workingchanging the shape of material by extrusion forging rolling
we are asked to design a qualitative analysis scheme that can be used to determine which cations are present in a solution containing only four of
what are ferrites ferrites are ceramic compounds containing trivalent metal having three valence electrons iron and oxide of divalent element ie
explain about the defect breakdown it is because of cracks and pores at the surface moisture from atmosphere can collect on the surface and result in
what is thermal breakdown it is because of the attainment of an excessive temperature in dielectric if heat dissipated is
explain about the intrinsic breakdownits because of the excitation of electrons into the conduction band across the energy gap
what is dielectric strengthdielectric strength- its the maximum voltagefield gradient voltage per unit thickness which the dielectric can
what are numerous products and application of micaapplications and products of micai sheet mica mainly used in electrical equipment and
what are properties of an ideal electrical insulating materialthe following are properties of an ideal electrical insulating materiali low
illustrate the salient aspects of ionic and metallic bonded crystalspropertiesionicmetallicbondingforcethe bonds exist due electro- static force of
why a covalent bond is directional covalent bond is formed as a result of pairing of two electrons in atomic orbitals of two atoms bond then must
what is the meaning of casting - fabrication processes fe-c alloys with more than 2 carbon are known as cast irons on crossing liquidus proeutectic
illustrate ib brief about the single crystal growth single crystals are grown either by czochralski cz method or by float zone fz method it comprises
determine the term - photolithography as used in manufacture of ics it is the process of transferring geometrical shapes on a mask to surface of a
define the process of metallization - fabrication processes its the process of providing electrical connections between different parts of the
explain objectives of annealing discuss the various annealing processes is spheroidising different from annealing illustrate a slow
what are ferrox cubes and ferrites how are mixed ferrites prepared for industrial uses give an account of applications of ferrites pointing out their
differentiate soft magnetic material from hard magnetic material in respect of hysteresis losses eddy current losses and domain wall motion with
define the term - local electric field and polarizationlocal electric field its the sum of the electric field from external sources and field of the