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Course: MATSE 280, Fall 2009
School: University of Illinois,...
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Word Count: 534

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280a Introduction MatSE to Engineering Materials 1. (5.1) Calculate the fraction of atom sites that are vacant for copper at its melting temperature of 1084 C (1357K). Assume an energy for vacancy formation of 0.9eV. 2. (5.3) Calculate the fraction of lattice sites that are Schottky defects for cesium chloride at its melting temperature (645 C). Assume an energy for defect formation of 1.86eV. 3. (5.5) Below,...

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280a Introduction MatSE to Engineering Materials 1. (5.1) Calculate the fraction of atom sites that are vacant for copper at its melting temperature of 1084 C (1357K). Assume an energy for vacancy formation of 0.9eV. 2. (5.3) Calculate the fraction of lattice sites that are Schottky defects for cesium chloride at its melting temperature (645 C). Assume an energy for defect formation of 1.86eV. 3. (5.5) Below, atomic radius, crystal structure, electronegativity, and the most common valence are tabulated, for several elements; for those that are nonmetals, only atomic radii are given. Element Ni C H O Ag Al Co Cr Fe Pt Zn Radius [nm] 0.1246 0.071 0.046 0.060 0.1445 0.1431 0.1253 0.1249 0.1241 0.1387 0.1332 Structure FCC Electronegativity 1.8 Valence +2 FCC FCC HCP BCC BCC FCC HCP 1.9 1.5 1.8 1.6 1.8 2.2 1.6 +1 +3 +2 +3 +2 +2 +2 Which of these elements would you expect to form the following with nickel: (a) A substitutional solid solution having complete solubility. (b) A substitutional solid solution of incomplete solubility. (c) An interstitial solid solution. 4. (W5.6) For both FCC and BCC crystal structures, there are two different types of interstitial sites. In each case, one site is larger than the other, and is normally occupied by impurity toms. For FCC, this larger one is located at the center of each edge of the unit cell; it is termed an 11 octahedral interstitial site. On the other hand, with BCC the larger site type is found at 0 2 4 positions--that is, lying on {100} faces, and situated midway between two unit cell edges on this face, and one-quarter of the distance between the other two unit cell edges; it is termed a tetrahedral interstitial site. For both and FCC BCC crystal structures, compute the radius r of an impurity atom that will just fit into one of these sites in terms of the atomic radius R of the host atom. 5. (5.6) (a) Suppose that CaO is added as an impurity to Li2 O. If the Ca2+ substitutes for Li+ , what kind of vacancies would you expect to form? How many of these vacancies are created for every Ca2+ added? (b) Suppose that CaO is added as an impurity to CaCl2 . If the O2- substitutes for Cl- , what kind of vacancies would you expect to form? How many of these vacancies are created for every O2- added? Homework 3 1 2009 February 25 MatSE 280a Introduction to Engineering Materials 6. (W5.2) Would you expect Frenkel defects for anions to exist is ionic ceramics in relatively large concentrations? Why or why not? 7. (5.11) Determine the approximate density of a Ti-6Al-4V titanium alloy that has a composition of 90 wt% Ti, 6 wt% Al, and 4 wt% V. 8. (5.D2) Gallium arsenide (GaAs) and indium arsenide (InAs) both have the zincblende crystal structure and are soluble in each other at all concentrations. Determine the concentration in weight percent of InAs that must be added to GaAs to yield a unit cell edge length of 0.5820nm. The densities of GaAs and InAs are 5.316g/cm3 and 5.668g/cm3 , respectively. 9. (5.18) (a) For a given material, would you expect the surface energy to be greater than, the same as, or less than the grain boundary energy? Why? (b) The grain boundary energy of a small-angle grain boundary is less than for a high-angle one. Why is this so? 10. (W5.21) Cite the relative Burgers vector-dislocation line orientations for edge, screw, and mixed dislocations. Homework 3 2 2009 February 25
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Chapter 100Scott KesslerThe Vatican Secretariat The Secretariat is one of the highest ranking members of the Vatican Clergy. Also, it is the organization of everyone who works for the Secretariat. The Secretariat himself does not rank highly becau
Middlebury - F - 1087
Chapter 101Pam ChatikavanijCollege Garden Newton's tomb Original SinCollege Garden Westminster Abbey 1st infirmary established in the 11th century. It cares for sick monks and elderly members on the monastic community. It grows its own herb to us
Middlebury - F - 1087
Chapter 102Ted IobstKensington Gardens Kensington Gardens See Chapter 93.
Middlebury - F - 1087
Chapter 103Angie ToddInterrogation room Holy Grail The Vatican Opus Dei Chateau Villette St. Mary's Hospital Saint-Sulpice Twenty Million Euro Mitre-CrozierInterrogation Room A room which holds the process where police obtain evidence from their
Middlebury - F - 1087
Chapter 105Ted IobstFieldstone house Chauvel Merovingian Papyrus Yahweh Shekinah BrunelleschiFieldstone house A house made from fieldstones, or &quot;stones as found in the field, used esp. for building.&quot;Italianvillas.com Complete definition of `fie
Middlebury - F - 1087
Chapter 11Pam ChatikavanijFibonacci sequence Mathematician Leonardo Fibonacci DCPJ Paris Match The Grand Gallery Deionized Twelve apostles Black OnyxFibonacci sequence Discovered in the year 1202 by a medieval mathematician named Leonardo of Pisa
Middlebury - F - 1087
Chapter 12Ellie MolyneuxMaze-Like series of dividers Spring In Paris Sauniere/SaunireMaze-Like series of dividers refers to the dividing system Grand Gallery of the Denon wing of the Louvre Museum.For a partial view of the Grand Gallery, go to
Middlebury - F - 1087
Chapter 13Angie ToddPostscript Concierge Cryptographer The Vitruvian Man &quot;Kept Woman&quot;Postscript A thing appended: an appendage. Also, an additional or conclusory remark or action, an afterthought, a sequel. Oxford English Dictionary Online, Oxfo
Middlebury - F - 1087
Chapter 14Rachel SleemanGPS Dot Board of Ministers GPS Dot See Chapter 8. Board of Ministers The Board of Ministers appears to be non-existent. There is the Council of Ministers. The Council of Ministers is headed by the Prime Minister. All bills m
Middlebury - F - 1087
Chapter 15Alexandra WidasSilas Audi Heckler&amp;Koch USP 40 Silas See Chapter 2. Audi See Chapter 10. Thirteen-round Heckler &amp; Koch USP 40 Heckler &amp; Koch is a manufacturer of handguns. USP stands for &quot;Universal Self-Loading Pistol&quot; and is the name of a
Middlebury - F - 1087
Chapter 16Jordan Tirrell-WysockiSpread-eagle Cryptogram Le Monde Substitution cipher Arc de Triomphe Montmartre &quot;arabesque dome of Sacr-Coeur&quot; Place du CarrouselSpread-eagle- b. To fasten, pin firmly, stretch out, etc., in the form of a spread ea
Middlebury - F - 1087
Chapter 17Jeff MurphyCryptology Fibonacci numbers Alarme! Grande Galerie! Toilettes Messieurs Cryptology See Chapter 9. Fibonacci numbers See Chapter 11. Alarme! &quot;Alarm!&quot; Grande Galerie! Toilettes Messieurs! &quot;Grand Gallery! Men's restroom!&quot; The G
Middlebury - F - 1087
Chapter 18Mike PerezSeine Pont des Saint-Peres Exodus Seine See Chapter 3. Pont des Saint-Peres: In The Da Vinci Code, Robert Langdon's GPS dot is thrown on a truck which turns right onto this street after heading south and crossing the Seine on Po
Middlebury - F - 1087
Chapter 19Jay DolanSaint-Sulpice Paris Egyptian goddess Isis Marquis de Sade Saint-Sulpice- See Chapter 7 Paris- See Prologue. Egyptian goddess Isis See Chapter 4. Notre Dame Cathedral This church was begun in 1163 A.D. and completed in three stage
Middlebury - F - 1087
Chapter 20Hasat Cakkalkurt Jeffrey MurphyJigsaw puzzle Frame me The Fibonacci sequence Pentacle The Vitruvian Man Coherent symbolic set Iconographer O Draconian Devil, Oh, Lame Saint! Baconian manuscripts Epigraphical ciphers Decipher Tarot cards (
Middlebury - F - 1087
Chapter 21Chip SherwoodAficionado Modernist Cubist Movement Picasso Les Demoiselles D'Avignon Salle Des Etats C'est ennuyeux Le Louvre, C'est pas chez moi Brumeux Sfumato CambridgeAficionado A devotee of bull-fighting; by extension an ardent foll
Middlebury - F - 1087
Chapter 22Mickey GilchristPew Sanctuary Roman cross Nave Transept Cupola Gnomon Pagan The Rose Line Obelisk Pyramidical Apex Oculus Solstice Compass Rose Fleur-de-lisPew [Late ME. puwe, pywe, pewe, app. orig. identical in form with OF. puye, puie
Middlebury - F - 1087
Chapter 23Katelyn CannellaSalle des Etats Mona Lisa Culs-de-sac Botticelli Octagonal viewing divan Black light Watermark stylus Ultraviolet penlight Monogram Treasure hunt Fleur-de-lis/lily Brotherhood Coat of arms Logo Prieur de Sion/Priory of Sio
Middlebury - F - 1087
Chapter 25Scott KesslerU.S. Embassy in Paris Champs-Elyses Bonjour, vous tes bien chez Sophie Neveu Je suis absente pour le moment, mais Time Magazine U.S. Embassy in Paris The American embassy in Paris is American soil in France. Owned and operate
Middlebury - F - 1087
Chapter 26Pam ChatikavanijMona Lisa Salle des Etats Sfumato style La Salon Carre Hermaphrodite Amon CondomMona Lisa Painted by Leonardo Da Vinci in Florence (1503-1506). Mona Lisa is also known as La Gioconda, the wife of Francesco del Giocondo.
Middlebury - F - 1087
Chapter 27Ellie MolyneuxBravado Elusive Quarry Senior Warden &quot;Handle It&quot;Bravado A noun of Spanish origin, meaning a strong showing of courage or bold behavior, or a daring action that shows one's defiancee=1&amp;search_id=b7qNvsUeQz7690&amp;hilite=00026
Middlebury - F - 1087
Chapter 28Angie ToddSalle des Etats Plexiglas Mona Lisa's mysterious smile So Dark The Con of Man Constantine Matriarchal Paganism Patriarchal Christianity Sacred Feminine Catholic Inquisition Malleus Maleficarum/ The Witche's Hammer Apple of Knowl
Middlebury - F - 1087
Chapter 29Rachel Sleeman&quot;Iron votive candle holder&quot; Battering Ram Vaulted Ceilings Mantle Loin Swaddle Moses Job 38:11 &quot;Hithero shalt thou come, but no further&quot; Bible Book of Job Main Alter Gilded Book Stand Alabaster-white Monk Old Testament &quot;They
Middlebury - F - 1087
Chapter 30Alexandra WidasClaude Grouard Do the Louvre guards carry loaded weapons? Does the additional surveillance in the Salle des Etats wreak havoc with communications? PTS (Police Technique et Scientifique) What painting is directly across from
Middlebury - F - 1087
Chapter 31Jordan Tirrell-WysockiUpper echelon Upper echelon- 3. transf. A grade or rank in any (esp. civil) administration or profession. orig. U.S. 1950 in M. McLuhan Mech. Bride (1951) 2/3 `The catalogue will be confined to posts in the higher ec
Middlebury - F - 1087
Chapter 32Jeff MurphyTuileries Gardens SmartCar La Pyramide Inverse Rue de Rivoli Champs-Elysees Fifth Avenue of Paris Madonna of the Rocks Confraternity of the Immaculate Conception Virgin Mary John the Baptist Uriel Tuileries Gardens See earlier.
Middlebury - F - 1087
Chapter 33Mike PerezChamps-Elysees Funeral pieu Memorial spike Cruciform Prismatic Hexagons Fleur-de-lis cruciare Arc de Triomphe Mickey Mouse watch Boulevard Malesherbes Gare Saint-LazareChamps-Elysees The Champs-Elyses, also named &quot;La plus bell
Middlebury - F - 1087
Chapter 34Jay DolanBishop Aringarosa Leonardo da Vinci International Airport Fiat Sedan Vatican Grille-plate medallions Seal of the Holy See Ostentatious Dioceses Cassock Castel Gandolfo The holy See Opus Dei's headquarters in NY Architectural Dige
Middlebury - F - 1087
Chapter 35Hasat CakkalkurtGare Saint-Lazare Bleary-eyed college kids Zoning out Blue-cad baggage porters Ruffling Gare Saint Lazare: It is the first Parisian railway station built in1837, next to the Place d'Europe. Its main line was its link from
Middlebury - F - 1087
Chapter 36Chip SherwoodHoly Trinity Holy Trinity See Chapter 6 Salle des Etats See Chapter 21 Interpol Interpol (International Criminal Police Organization) is an organization that exists to facilitate the cooperation of the criminal police forces
Middlebury - F - 1087
Chapter 37Mickey GilchristBois de Boulogne Bosch painting Nocturnal Godefroi de Bouillon Herod's temple Solomon's Temple Order of the Poor Knights of Christ Knights Templar Pilgrims Holy Land Second Crusade King Baldwin II Pope Innocent II King Phi