Fizikalno-hemijske osnove keramike
1. Osnovne razlike izmeu tri agregatna stanja. Skicirati i
objasniti.
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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
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Objasniti tok prenosa toplote u primjeru prikazanom na slici.
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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.
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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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10: Utvrditi o kojim tipovima ternarnih dijagrama se radi na
slikama A i B, te oznaiti ravni likvidusa i solidusa.
Slika
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Slika
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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
.
