preliminarni test
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preliminarni testTRANSCRIPT
Fizikalno-hemijske osnove keramike
1. Osnovne razlike izmeu tri agregatna stanja. Skicirati i objasniti.
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__________________________________________________2. Dva vrsta tijela istog sastava i dimenzija su zagrijana na temperaturu 30C, odnosno 80C. Objasniti u emu je razlika izmeu ovih tijela.___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
3. ta je temperatura,a ta toplota?________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________4. Objasniti tok prenosa toplote u primjeru prikazanom na slici.
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_____________________________________5. ta je faza, a to komponenta sistema? Koliko faza,a koliko komponenata imaju sistemi predstavljeni na slijedeim slikama:___________________________________________________________________________________________________________________________________________________________________________________________________________________________
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6. Jednokomponenti sistemi.
Gibsovo pravilo faza:
Za take oznaene na dijagramu odrediti broj stepena slobode.
7. Iz sistema se konstantnom brzinom odvodi toplota. Skicirati dijagram hlaenja. Kako se ponaa ista supstanca, a kako sistem od dvije komponente? Koji su mogui krajnji ishodi nakon hlaenja sistema od dvije komponente.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________8. ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________9. ta je vrsti rastvor? Koji su uslovi za nastajanje vrstog rastvora u dvokomponentnim sistemima?
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ZADATAK 1: Utvrditi koje faze su prisutne i odrediti procentualni udio tih faza u sistemu iji je dijagram stanja predstavljen na slici:
a) Na temperaturi 1400C, pri sastavu 80% A i 20% B.
b) Na temperaturi 1200C, pri sastavu 70% A i 30% B.
ZADATAK 2: Opisati tok hlaenja taline koji poinje iz take X. Odrediti udio tene i vrste faze, kao i sastav tene faze na temepraturama T2 i T3. Objasniti ta je eutektiki sastav.
ZADATAK 3: Opisati tok hlaenja talina koje poinje iz taaka X, Y i Z. Odrediti udio tene i vrste faze, kao i sastav tene faze na temperaturama 1710 i 1520 C, pri hlaenju taline iz take X. Objasniti ta je peritektik.
ZADATAK 5: Opisati tok hlaenja taline koji poinje iz take X. ta je eutektoid?
ZADATAK 6: Opisati tok hlaenja talina koje poinje iz taaka X, Y i Z. Odrediti udio tene i vrste faze, kao i sastav tene i vrste faze na temperaturama 1400 i 1250 C, pri hlaenju taline iz take X.
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ZADATAK 8: Opisati tok hlaenja talina koje poinje iz taaka X, Y i Z. Locirati na dijagramu eutektiku i peritektiku taku.
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ZADATAK 9: Odrediti ukupni sastav trokomponentnog sistema u takama X, Y i Z.
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______________________________________________________________________________________________________________________________________________________ZADATAK 10: Utvrditi o kojim tipovima ternarnih dijagrama se radi na slikama A i B, te oznaiti ravni likvidusa i solidusa.
Slika A._________________________________________________________________________________
Slika B.__________________________________________________________________________________
FAZNA ANALIZA NA ZADATOJ TEMPERATURI TERNARNI SISTEMI SA POTPUNOM RASTVORLJIVOU U VRSTOM STANJU
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______________________________________________________________________________________________________________________________________________________FAZNA ANALIZA NA ZADATOJ TEMPERATURI TERNARNI SISTEMI SA POTPUNOM NERASTVORLJIVOU U VRSTOM STANJU_____________________________________________________________________________________________________________________________________________________
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______________________________________________________________________________________________________________________________________________________SLIJED OVRAVANJA TERNARNI SISTEMI SA POTPUNOM NERASTVORLJIVOU U VRSTOM STANJU
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(2=18C
(2=27C
sunce
vjetar
Voda
Vodena para
Led
(-kvarc
(-kvarc
4.
3.
1.
2.
5.
ista supstanca (A)
Smjesa (A+B)
(
t
(
t
X
.
Y
.
Z
.
Z
.
Y
.
X
.
Z
.
Y
.
X
.