Research and Development

High strength and long life molybdenum material kind to the global environment. High toughness and deformation resistant molybdenum (TEM)

Drawbacks of pure molybdenum material include recrystallization brittleness and creep (deformation) resistance at high temperature. The material that has been developed to overcome these drawbacks is TEM. We have succeeded in improving the material characteristics considerably by a combination of addition of special elements in a small amount and plastic working.

Features

1. High recrystallization temperature and highly resistant to high temperature deformation.

High temperature deformation characteristics of TEM plate

High temperature deformation characteristics of TEM plate

Comparison of deformation of TEM heater and pure Mo heater (Diameter 4 mm, 1500℃ in vacuum, 6 months after use)

Comparison of deformation of TEM heater and pure Mo heater (Diameter 4 mm, 1500℃ in vacuum, 6 months after use)

2. Wedge-shaped recrystallized structure to minimize high temperature deformation.

Comparison of recrystallized structures of TEM, pure Mo and TZM

Comparison of recrystallized structures of TEM, pure Mo and TZM

3. High bending strength (room temperature) after recrystallization

Comparison of bending of TEM and pure Mo recrystallized rods

Comparison of bending of TEM and pure Mo recrystallized rods

4. High shock resistance (room temperature) after recrystallization

5. High high-temperature strength

High temperature strength of TEM plate

High temperature strength of TEM plate

6. Thermal and electrical characteristics equivalent to those of pure Mo.

Thermal and electrical characteristics

Characteristics TEM Pure Mo
Thermal conductivity(W/m・K) 157 157
Heat transfer coefficient(10-5m2/S) 5.92 5.87
Specific heat(J/Kg・K) 260 261
Coefficient of thermal expansion
(10-6/K)
RT~373K 3.3 3.5
RT~773K 6.0 5.6
RT~1273K 7.8 7.1
Electric resistance
(10-8Ω・m)
296K 5.4 5.5
473K 8.6 8.5
673K 13.6 13.6
873K 19.2 19.6
1073K 24.7 24.8
1273K 30.2 30.4

Specifications

Plates: 0.2 – 3.0 mm thick x 300 mm wide x 2000 mm long
Wires/rods: Diameter 0.1 mm – 30 mm

Examples of application

※Unusable in the atmosphere.

・High temperature furnace reflectors
・High temperature furnace heaters
・High temperature furnace structural materials (pins, bolts, nuts, hooks)
・Base plates for sintering boats, crucibles
・Halogen lamp supports
・High temperature shafts

Example 1

Vacuum furnace
 

<Heater shape>

D 4mm

<Conditions of use>

Temperature 1500℃, degree of vacuum 1.1×10-3Pa

Material Life
TEM 3 years
8 months
(2.7 times longer
than pure Mo)
Pure
molybdenum
Average
1 year
4 months
Example 2

High temperature hydrogen atmosphere furnace

<Heater shape>

D 2mm x 3 wires twisted

<Conditions of use>

Temperature 1750℃, dew point -40℃

Material Life
TEM 2 years
3 months
(3.5 times longer
than pure Mo)
Pure
molybdenum
Average
1 year
4 months
Example 3

High temperature hydrogen atmosphere furnace

<Heater shape>

D 2mm x 3 wires twisted

<Conditions of use>

Temperature 1800℃, dew point -40℃

Material Life
TEM 3 years
6 months
(4.6 times longer
than pure Mo)
Pure
molybdenum
Average
9 months