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Chapter i15: iCeramics 15-4 Zirconia i(cubic) iand idiamond iare itested ito idetermine itheir iexpansion iwhen itheir itemperatures iincrease iby ia iset iinterval. iAssuming iboth iare ipure, ihow imuch imore ishould ithe iZrO2 iexpand ithan ithe idiamond isample? iDoes ithis igive iyou iany iinsight iabout idistinguishing ibetween ithese imaterials? Solution: Referring ito iTable i15-2, iwe ican isimply itake ithe iratio iof ithe ...

Chapter i12: iDispersion iStrengthening iby iPhase iTransformations iand iHeat iTreatment 12-1 (a) iDetermine ithe icritical inucleus isize ir* ifor ihomogeneous inucleation ifor iprecipitation iof iphase iβ iin ia imatrix iof iphase iα. iHint: iThe icritical inucleus isize ioccurs iat ithe imaximum iin ithe iexpression ifor iΔG(r) iin iEquation i12–1. i(b) iPlot ithe itotal ifree ienergy ichange iΔG ias ia ifunction iof ithe i...

Chapter i8: iStrain iHardening iand iAnnealing 8-5 What iis ithe idifference ibetween iextrusion iand idrawing? Solution: Extrusion i– ithe iforce iis iexerted ion ithe ilarger ioriginal icross-section iof ithe iwork-piece ithat iis ipushed ithrough ia idie. iDrawing i– ithe iforce iis iapplied ion ithe ismaller icross-section ithat ihas ialready ipassed ithrough ithe idie. 8-6 Consider ithe itensile istress istrain icurves iin ...

Chapter i7: iMechanical iProperties: iPart iTwo 7-1 Alumina i(Al2O3) iis ia ibrittle iceramic iwith ilow itoughness. iSuppose ithat ifibers iof isilicon icarbide iSiC, ianother ibrittle iceramic iwith ilow itoughness, icould ibe iembedded iwithin ithe ialumina. iWould idoing ithis iaffect ithe itoughness iof ithe iceramic imatrix icomposite? Explain. Solution: The iSiC ifibers imay iimprove ithe itoughness iof ithe ialumina imatrix. iT...

Chapter i6: iMechanical iProperties: iPart iOne 6-14 Calculate ithe imaximum iforce ithat ia i0.2-in. idiameter irod iof iAl2O3, ihaving ia iyield istrength iof i35,000 ipsi, ican iwithstand iwith ino iplastic ideformation. iExpress iyour ianswer iin ilbs iand iN. Solution: F i= iSA0 i= i(35,000 ipsi)(π/4)(0.2 iin.)2 i= i1100 ilb F i= i(1100 ilb)(4.448 iN/lb) i= i4891 iN 6-15 A icylindrical ispecimen iof ia ititanium ialloy ihavi...

Chapter i5: iAtom iand iIon iMovements iin iMaterials 5-10 Atoms iare ifound ito imove ifrom ione ilattice iposition ito ianother iat ithe irate iof i5 i× i105 ijumps/s iat i400°C iwhen ithe iactivation ienergy ifor itheir imovement iis i30,000 ical/mol. iCalculate ithe ijump irate iat i750°C. Solution: 5105 c iexp[ i i30, i000/(1.987)/(673)] Rate i  i i io  iexp( i i22.434 i14.759) x co iexp[ i i30, i...

Chapter i4: iImperfections iin ithe iAtomic iand iIonic iArrangements 4-1 Gold ihas i5.82 i× i108 ivacancies/cm3 iat iequilibrium iat i300 iK. iWhat ifraction iof ithe iatomic isites iis ivacant iat i600 iK? Solution: The inumber iof ivacancies iper icm3 inv iis igiven iby  iQv i nv i in iexp i iRT i i,   where in iis ithe inumber iof iatoms iper icm3, iQv iis ithe ienergy irequired ito iproduce ion...

Chapter i3: iAtomic iand iIonic iArrangements 3-1 What iis ia icrystalline imaterial? Solution: A iuniform isubstance imade iup iof ia ithree idimensional, igrid-like irepeating ipattern. 3-2 What iis ia isingle icrystal? Solution: A icrystalline imaterial ithat iis icomposed iof ionly ione icrystal. 3-3 State itwo iapplications iin iwhich isingle icrystals iare iused. Solution: Silicon iintegrated icircuit i(computer) ichips iand i...

Chapter 2: Atomic Structure 2-1 What is meant by the term composition of a material? Solution: The chemical make-up of the material. 2-2 What is meant by the term structure of a material? Solution: The spatial arrangement of atoms or ions in the material. 2-3 What are the different levels of structure of a material? Solution: Atomic structure, short- and long-range atomic arrangements, nanostructure, microstructure, and macrostructure. 2-4 Why is it important to consider the ...

Chapter 2: Atomic Structure 2-1 What is meant by the term composition of a material? Solution: The chemical make-up of the material. 2-2 What is meant by the term structure of a material? Solution: The spatial arrangement of atoms or ions in the material. 2-3 What are the different levels of structure of a material? Solution: Atomic structure, short- and long-range atomic arrangements, nanostructure, microstructure, and macrostructure. 2-4 Why is it important to consider the ...