Ewoks are furry inhabitants of the moon Endor. For defense against imperial stor

Question

Ewoks are furry inhabitants of the moon Endor. For defense against imperial storm troopers they use ceramic spears and hammers made from the MgO-SiO_2 system. Determine whether regions I, II, and III are 1 or 2 phase regions. Identify the formula of any/all phase(s) in these regions. An initial composition of 58 wt% SiO_2 is cooled from 2000 degree C to 1400 degree C. Sketch the microstructure and identify the weight fraction, composition of any/all phase(s) present. How many degrees of freedom are there in region I, II, and at the boundary between region I and II?

Explanation / Answer

I : 42:58

II: 50:50

III : 60:40

2. 58:42 three solid solutions

3 p+f=c+1

C is the number of components

P is the no of phases

F= 2-2+1

F= 1

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