1. Definition of ‘Melting Point’
Important property in Mechanical engineering
Solid & Liquid coexistence
Changing of State point

2. Property Menling point is determined by Intermolecules Forces
High Interforce High Melting point
Low Interforce Low Melting point
T = ΔH / ΔS
T : Melting point
ΔH : Enthalpy
ΔS : Entropy
(°C)
3422˚C
2700˚C
1668˚C
1535˚C
660˚C
328˚C

3. Application Using Low melting point Using High melting point Soldering
Turbine
Tin + Lead
Titanium
Fuse
Furnace
Tin + Lead
Tungsten, zirconia