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Ensinger PEI

Molybdenum Disilicide, MoSi2
Categories: Metal; Intermetallic

Material Notes: Forms Gray Tetragonal Crystals. MoSi2 is often used as a heating element in high temperature furnaces. It has an appropriate resistivity and is stable toward oxidation up to 1950°C because a protective coating of SiO2 forms.

Key Words: Molybdenum Silicide, MoSi2
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Physical PropertiesMetricEnglishComments
Density 6.23 g/cc0.225 lb/in³
Molecular Weight 152.11 g/mol152.11 g/mol
 
Mechanical PropertiesMetricEnglishComments
Hardness, Vickers 900 - 1200900 - 1200Microhardness reported as 8240 MPa.
Tensile Strength, Ultimate 185 MPa26800 psi
Modulus of Elasticity 242 GPa35100 ksiHIPped
 377 GPa54700 ksiHot pressed
 329 GPa
@Temperature 608.3 °C
47700 ksi
@Temperature 1127 °F
Hot pressed
Flexural Yield Strength 317 MPa
@Temperature 20.0 - 627 °C
46000 psi
@Temperature 68.0 - 1160 °F
Compressive Yield Strength 769 MPa112000 psiat 0.1% strain
Fracture Toughness 2.70 - 5.90 MPa-m½2.46 - 5.37 ksi-in½KIC
Shear Modulus  151.4 GPa
@Temperature 1127 °C
21960 ksi
@Temperature 2061 °F
 180.4 GPa
@Temperature 22.0 °C
26170 ksi
@Temperature 71.6 °F
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000270 - 0.0000370 ohm-cm0.0000270 - 0.0000370 ohm-cm
 0.0000448 ohm-cm0.0000448 ohm-cm[001] crystalline direction
 
Thermal PropertiesMetricEnglishComments
CTE, linear  6.50 µm/m-°C
@Temperature 20.0 °C
3.61 µin/in-°F
@Temperature 68.0 °F
 7.47 µm/m-°C
@Temperature 227 °C
4.15 µin/in-°F
@Temperature 441 °F
 8.46 µm/m-°C
@Temperature 477 °C
4.70 µin/in-°F
@Temperature 891 °F
 9.95 µm/m-°C
@Temperature 1027 °C
5.53 µin/in-°F
@Temperature 1881 °F
 10.4 µm/m-°C
@Temperature 1600 °C
5.78 µin/in-°F
@Temperature 2910 °F
Specific Heat Capacity  0.437 J/g-°C
@Temperature 23.0 °C
0.104 BTU/lb-°F
@Temperature 73.4 °F
 0.600 J/g-°C
@Temperature 1423 °C
0.143 BTU/lb-°F
@Temperature 2593 °F
Thermal Conductivity  28.6 W/m-K
@Temperature 1423 °C
198 BTU-in/hr-ft²-°F
@Temperature 2593 °F
 66.2 W/m-K
@Temperature 23.0 °C
459 BTU-in/hr-ft²-°F
@Temperature 73.4 °F
Melting Point 1900 - 2050 °C3450 - 3720 °F
Maximum Service Temperature, Air 1950 °C3540 °Fprotective SiO2 layer forms
 
Component Elements PropertiesMetricEnglishComments
Molybdenum, Mo 77.4 %77.4 %
Silicon, Si 22.6 %22.6 %
 
Descriptive Properties
Crystal StructureTetragonal

References for this datasheet.

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MISIM0 / 12205

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