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Chapter 7
MSE 2001
19
Other
Undergraduate 4
04/24/2016

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Term
Gibbs Phase Rule
Definition
One component: F = C - P + 2

Two component: F = C - P + 1 (constant pressure)

F: degrees of freedom
C: components
P: number of phases
Term
Eutectic
Definition
liquid <-> solid A + solid B
Term
Eutectoid
Definition
solid <-> solid A + solid B
Term
Monotectic
Definition
liquid 1 <-> solid A + liquid 2
Term
Monotectoid
Definition
solid A2 <-> solid A1 + solid B
Term
Peritectic
Definition
liquid + solid B <-> solid A
Term
Peritectoid
Definition
solid A + solid B <-> solid
Term
Variables in 1-component phase diagram
Definition
Temperature and pressure
Term
Variables in 2-component phase diagram
Definition
Temperature and composition
Term
Maximum solid solubility is determined by ______
Definition
Hume-Rothery rules
Term
Congruent melting
Definition
The melting reaction that occurs in an alloy system in which there is no change in composition when the solid transforms to the liquid
Term
Incongruent melting
Definition
When a solid of one composition transforms to a liquid of another composition and a solid
Term
Solvus
Definition
The phase boundary separating a solid region from a two-phase solid region
Term
Phase
Definition
A region that is chemically and structurally homogeneous
Term
The invariant point
Definition
F = 0
Term
Liquidus
Definition
Separates single-phase liquid region from two-phase liquid+solid region
Term
Solidus
Definition
Separates single-phase solid region from two-phase liquid+solid region
Term
Immiscible
Definition
Not forming a homogeneous mixture when added together.
Term
Component
Definition
A chemically distinct and essentially indivisible substance
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