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Quiz4 soln - f g h Name T Fa H‘ens Section 2 MTE 208 Fall...

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Unformatted text preview: f) g) h) Name: T. Fa H‘ens Section 2 MTE 208 Fall 2008 Quiz 4 Phase Diagrams Nov. 18, 2008 Please answer the following questions using the phase diagram for copper (Cu) and sitver (Ag): What is the name of this type of phase diagram? fihai’g EQTQ (THC. What is the matting point of pure copper? NIQO °C. What is the meiting point of pure sitver? {80 °C. As a small amount of silver (Ag) is added to c- u». ., hat happens to the metting point of the (Cu) phase? Increases Decreases ' Stays the same What is the composition of the CuuAg attoy that has the lowest matting point? ‘ 743 (Hi 9’0 k3 t Z‘EH wt a[o Cu Gone ewEC‘HC momposmoh} What is the maximum amount of Ag that can dissolve in 10 grams of Cu? O °° 83L 9 Ag 30 not 7m in Co CSTM max‘imum that)“ in - ‘03,“ Cu .—. (3102 was a; {gages mm»: K1375 x. 0; 8°? 3 24% com aixsseere in 103 Cu» 15 g of Ag are mixed with 1.5 g of Cu and the mixture is brought to 1100°C. What phase(s) are present at equilibrium? ***Draw the constitution point to:r att problems where this is applicabte ***. 5 ._ o o k r ‘ “CE W 430.9 our bags grim/shay. @uomc huge LL91.“ The same mixture from part e) is cooled to 700°C. What phase(s) are present at equitibrium? CCU.) + (9%» What are the composition(s) of the phase(s) from part 9)? (Cu) 2 ein/o A0} + gems.) Cu ; (Ag 3 94oi0/o he]. r (o m QUOJ Labei the 4 lines and 1 point indicated by arrows. in each phase fietd, write in the names of the equiiibrium phases. Use L = liquid, (Cu) = copper-rich soiid solution, (Ag) = silver—rich solid solution. , __ Cu and Ag both have the FCC crystal structure. Are they completely sotuble in one another? YES Composition (at% Ag) Temperature (”C} Temperature (at?) (Cu) 6 Camsesidoniwttt he} ‘ 094 that ’l. f) 9) h) V Name: T 192173103 _ Section 2 MTE 208 Fall 2008 Quiz 4 Phase Diagrams Nov. 18, 2008 Please answer the foiiowtng questions using the phase diagram for copper (Cu) and silver (Ag): What IS the name of this type of phase diagram? 65(0an eateeh (L What' is the melting point of pure copper? t" 10 20 ”C. What is the melting point of pure silver? gm “C. As a smaii amount of siiver (Ag) is added to c perewhat happens to the melting point of the (Cu) phase? increases ( Decreases D Stays the same What is the composition of the Cu-Ag alloy at as the towest melting point? a a (at 235 at} i as; use t at What is the maximum amount of Ag that can dissoive in 10 grams of Cu? O ’ 8:!!— 9 Ag 15 g of Ag are mixed with 1.5 g of Cu and the mixture is brought to “00°C. What phase(s) are present at equiiibrium? ***Draw the constitution point for all problems where this is applicable ***. Liquid The same mixture from part e) is cooied to 800°C. What phase(s) are present at equilibrium? L_ t‘ (A g0 What are the composition{s) of the phase(s)a from part 9)? ___ 9’ C L: $3 001% Ag +2.2 cot % Cu. C09“ 93®+ya7¢$+ifm 0 U“ Label the 4 lines and 1 point indicated by arrows. in each phase fie-id, write in the names of the equilibrium phases. Use L = liquid, (Cu) = copper-rich soiid solution. (Ag) = silver‘rich solid solution. Cu and Ag both have the FCC orystai structure. Are they completely soiuble in one another? YES {tom-position tat% Ag) 0 20 do 60 80‘ 100 1200 .. EH . _. 1000 - E .800 E a a :3 :3 CL a s s F 600 t“ 1100 200 0 (Cu) Composition [whit Ali} 17% 93 (As) Name: T 1‘? / W3 Section 1 MTE 208 Fall 2008 Quiz 4 Phase Diagrams Nov. 18, 2008 Ptease answer the following questions using the phase diagram for copper (Cu) and silver (Ag): What is the name of this type of phase diagram? is) What is the meiting point of pure copper? ”C. What is the melting point of pure silver? °C. 0) As a small amount of silver (Ag) is added to copper. what happens to the melting point of the (Cu) phase? Increases Decreases Stays the same d) What is the composition of the Cu-Ag alloy that has the towest melting point? e) What is the maximum amount of Cu that can dissotve in 10 grams of Ag? 9 Cu WW f) 2.25 g of A9 are mixed with 12.75 g of Cu and the mixture is brought to 1100°C. What phase(s) are present at equiiihrium? *“Draw the constitution point for all probiems where this is applicabie ***. 2. 26% Ag) ;. (Spat-Egg, A3 :1 Ltqutoi <53 hat) ‘E’, if: 3 doing 9) The same mixture from part e) is cooled to 700°C. What phase(s) are present at equitihrium? ‘ (so + C M) h) What are the composition{s) of the phase(s) from part 9)? “i” fi/ A a“ @ W 5%, CW (Co) = 6 tholo A3 + eewW/o Cu. .3 We) -. WW ‘3‘ 3 W i) i) Labei the 4 lines and 1 point indicated by arrows. In each phase fieid. write in the names of the equiiibrium phases. Use L == liqhid, (Cu) == coppernrich solid soiution, (Ag) = siiver—rich soEEd soiution. Cu and Ag both have the FCC crystal structure. Are they compietely solubie in one another? YES NO Composition {at% A3) 0 20 110 $0 80 100 1060 8936 Temperatute {”0} Temperature {"5} Composition lwt% Ag) Name: 7: {fig/71mg ‘ _ -' Section 1 MTE 208 Fall 2008 Quiz 4 Phase Diagrams Nov. 18, 2008 t. Ptease answer the following questions using the phase diagram for copper (Cu) and silver (Ag): a) What is the name of this type of phase diagram? b) What is the melting point of pure copper? °C. What is the melting point of pure silver? °C. c) As a small amount of siiver (Ag) is added to copper, what happens to the melting point of the (Cu) phase? Increases Decreases Stays the same d) What is the composition of the CuuAg alloy that has the lowest melting point? e} What is the maximum amount of Cu that can dissolve in 10 grams of Ag? g Cu ?) 2.25 g of Ag are mixed with 12.75 g of Cu and the mixture is brought to “00°C. What phase(s) are present at equilibrium? ***Draw the constitution point for all prohtems where this is applicable ***. Wagggtfiew 1. wage Esme/Dag wig”, 2.2%‘t‘ 12,853 g) The same mixture from part e) is coated to 900°C. What phase(s) are present at equiiibnum? (00+ L h) What are the ccmpositionhs) of the phase{s) from part g)? (CLO: 8m 0/0 A3+ 92, eve/o Cat ,v Lem (greasy Soot 0am. i) " Label the 4 tines and 1 point indicated by arrows. in each phase fieid, write in the names of the equilibrium 1 phases. Use t. m EEquid, (Cu) : copper-rich soiid soiution, (Ag) = silverdrich solid solution. j) Cu and Ag both have the FCC crystaE structure. Are they completely soiuble in one another? YES NO Composition (at% Fig} 100 1 EGO ' 22 00 2000 was t 1800 ' 1660 Temperature PG) Temperature FF) 200 0 {Ca} , Composition [wt% As} (An) 2. Draw a phase diagram for hypothetical elements A and B given the following information (Label the axes first.) a) The melting point of pure A is 900°C. b) The melting point of pure Bis 550°C. 5) A and Bare form a continuous sotid solution at room temperature (they are comptetely soluble in one another.) 6) When 33 g of A is combined with 55 g of B, the mixture stats to mett at 600°C and is completely melted at 725°C. ESE/Castes) =2 o - we a a. assume/o e. _‘ M e) What type ofphase diagram is this? Ear oar Leo mar ghosts lease @agcam 1‘) When a smali amount of B is added to A, the melting point of the A-rich attoy: Increases Decreases Stays the same 9) Labet all of the phase fields, tines, and important points on the phase diagram. h) For the composition given in part d), how many phases are present at 650°C? TW 0 i) . Namethe phase(s)in partffi h) LiOLULl‘d «t- scouti- j) Give the mass of each phase in partg’) h) L: ®Z*5‘5‘3 1:. iézfiw: meat/3mm K‘afig 101-30 1‘ 566?& LfflUl'd . . Q ' ‘50 “*50 * ~ . ~Q£D§ 13": 380%“ . : iii-5. a 555th solicit x803 trawl“: W . k) Give the composition(s) of each phase in part g) k) . The “015*“ is go mayo 3 + 2,10 mag A ; mm ssfitdcs 150 water SOw‘i%A l Ir IA_ El I: I I t» , ,_ III-.- III-.- _a III-IIIMH: -IIIIIIIEH EEEEEHFfi'vtE III-IMMI- III-In”.- A to 20 :at) 4—0 k) . . "*\a meet 3:; 5} El): ”“521 779mm Draw a phase diagram for hypotheticai elements A and 8 given the following information (Labei the axes first.) The melting point of pure A is 500°C. The melting point of pure B is 850 °C. A and B_ form a continuous solid sotution at room temperature (they are comptetely soluble In one another.) When 55 g of A Is combined with 33 g of B the mixture starts to melt at 600°C and is completeiy melted at 700° 0 55/515933): 0 3‘? 5 What type of phase diagram Is this? fiifiaflfi 135 ("n Oriflfl 0W3 When 3 em a. .. u . _nt of B Is added to A, the melting point of the A»rich ailoy: Decreases Stays the same Label aft 0 ‘ - i" . 'efietds lines and important points on the phase diagram. For the composition given in part d). how many phases are present at 650°C? __&—_ Name the phase(s) in part g) Li qPUJCi ‘5‘ SO“ CL Give the mass of each phase In part g) LICWOL W eIIIotQ/wztgmefl 55,25 Itqat‘ol A a W t W .... saw fiolud— %,o A? 3e aamaoxaggeaa MW Give the composition(s} of each phase In part g) [000 0 W0. ‘/ g 8% WM L/ maggot: 695+ out 0/0 F321“ ”$3 «at ‘32; A 5 solida- ‘Stiuot 9%; g teem—tea ...
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