材料工程材加专业课复试全英文.pdf

A480

Abrasive.Ahardandwear-resistantAlloysteel.Aferrous(orironbased)

material(commonlyaceramic)alloythatcontainsappreciable

thatisusedtowear,grind,orcutconcentrationsofalloying

awayothermaterial.elements(otherthanCandresidual

Absorption.TheopticalphenomenonamountsofMn,Si,S,andP).These

wherebytheenergyofaphotonalloyingelementsareusuallyadded

oflightisassimilatedwithinatoimprovemechanicalandcorrosion

substance,normallybyelectronicresistanceproperties.

polarizationorbyanelectronexcitationAlternatingcopolymer.Acopolymer

event.inwhichtwodifferentmerunits

Acceptorlevel.Forasemiconductoralternatepositionsalongthemolecular

orinsulator,anenergylevellyingchain.

withinyetnearthebottomofAmorphous.Havinganoncrystalline

theenergybandgap,whichmayacceptstructure.

electronsfromthevalenceAnelasticdeformation.Time-dependent

band,leavingbehindholes.Theelastic(nonpermanent)deformation.

levelisnormallyintroducedbyanAnion.Anegativelycharged,nonmetallic

impurityatom.ion.

Activationenergy(Q).TheenergyAnisotropic.Exhibitingdifferent

requiredtoinitiateareaction,suchvaluesofapropertyindiffer