For example, the water phase diagram has a triple point corresponding to the single temperature and pressure at which solid, liquid, and gaseous water can coexist in a stable equilibrium (273.16 K and a partial vapor pressure of 611.657 Pa).
What is Monotectic system?
The monotectic reaction occurs at temperature Tm and composition Xm and the eutectic reaction at Te and Xe’ The separation of the high temperature liquid phase L into two phases is bounded by the miscibility gap, the highest point of which is termed the consolute point.
What is the phase of water?
There are three phases of water that are studied in elementary school: solid, liquid, and gas.
What are the different phases of water?
Water can occur in three states: solid (ice), liquid, or gas (vapor).
- Solid water—ice is frozen water. When water freezes, its molecules move farther apart, making ice less dense than water.
- Liquid water is wet and fluid.
- Water as a gas—vapor is always present in the air around us.
What is Monotectic phase diagram?
A monotectic point ( 2 ) ( 3 ) on a phase diagram is an invariant point where a single liquid phase transitions into a different liquid phase and a solid phase, or vice versa. The two liquids involved are immiscible, like oil and water, so monotectic points also involve miscibility gaps.
What is peritectic phase diagram?
Peritectic point – The point on a phase diagram where a reaction takes place between a previously precipitated phase and the liquid to produce a new solid phase. When this point is reached, the temperature must remain constant until the reaction has run to completion. A peritectic is also an invariant point.
What are the phase equilibria of the Ti–Al system?
New experimental results on the phase equilibria between the β -Ti (A2), α -Ti (A3), α2 -Ti 3 Al (D0 19) and the γ -TiAl (L1 0) phases in the Ti–Al system using specimens with low levels of oxygen are presented.
What is the binary Al-Si phase diagram?
The binary Al-Si phase diagram was initially studied by Fraenkel of Germany in 1908. It is a relatively simple binary diagram where there is very little solubility at room temperature for Si in Al and for Al in Si. Thus, the terminal solid solutions are nearly pure Al and Si under equilibrium conditions.
What are the different phases of TiAl alloys?
Three different intermetallic phases of TiAl-based alloys exist, namely γ-TiAl, Ti 3 Al (α 2 ), and TiAl 3 [3, 22, 23]. Of these phases, only the fully lamellar one and nearly fully lamellar one, consisting of γ-TiAl and Ti 3 Al (α 2 ), have engineering significance [2, 4].
Why are the equilibria of Ti–Al aluminides different at high temperatures?
Particularly noticeable are the disagreements associated with the equilibria at high temperatures in Ti–Al aluminides, which are considered to arise mainly due to oxygen contamination. Kainuma et al. [3] have summarized such uncertainties and have carried out some investigations in the Ti–Al binary system.
