1. Introduce
– Refractory metal mostly used as a material to make superalloys that can withstand high temperatures
– Possesses the properties of being both malleable and ductile, with ductility improving upon heating and cooling
– Metal with a high melting point (3186℃) and boiling point (5596℃)
– Rhenium alloys can be utilized as superconductors at extremely low temperatures
– Chemical reactivity is relatively small compared to other metals, so it does not oxidize well in the air, and the surface oxidizes and discolors at a slow rate in a humid atmosphere (powdered form is relatively reactive)
– Re alloying element influence : high temperature ductility, tensile strength
2. Property
– Heat resistance, high temperature wear resistance, strength, hardness, good plasticity
[Re Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| 1070 | 290 | 15~25 |
[Re Physical Properties]
| Density (g/㎤) | Melting Range (℃) | Electrical resistivity (µΩ∙㎝) | Specific Heat (J/kg∙℃) | Thermal Conductivity (W/mK) | Coefficient of Thermal Expansion (µm/m°C) |
|---|---|---|---|---|---|
| 21.03 | 3186 | 19.3 | 130 | 39.6 | 6.12 |
3. Application
– Combustion chambers, turbine blades, exhaust nozzles of jet engines, jet engines, catalysts in the chemical industry, thermocouples for high temperature measurement, electrical contacts
(1) Turbine blades / (2) Exhaust nozzles of jet engines / (3) Thermocouples for high temperature measurement / (4) Electrical contacts
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