Zircalon is a recently added material to our portfolio and is the toughest of all monolith ceramics. It is a partially stabilised zirconia characterised by very high strength and toughness giving it excellent wear resistance as well as excellent corrosion resistance.
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Applications of Zircalon
Zircalon is used in applications typically in the metal forming industry as weld location pins for resistance welding of captive nuts on sheet metal and is available in two grades, Zircalon 5 and Zircalon 10. Zircalon 10 is the stronger and tougher of the two grades and possesses better impact resistance.
Zircalon 5 - Mechanical, Thermal and Electrical Properties
The table below lists typical mechanical, thermal and electrical property data for Zircalon 5.
Table 1. Mechanical, thermal and electrical property data for Zircalon 5.
|
Property
|
Value
|
Unit
|
|
3 point RT Modulus of Rupture
(Specimen 3 x 3 x 50mm, span 19.05mm)
|
1000
|
MPa
|
|
Weibull Modulus
|
15
|
-
|
|
RT Unit Tensile Strength
|
500
|
MPa
|
|
RT Compressive Strength
|
>2000
|
MPa
|
|
RT Young's Modulus of Elasticity
|
205
|
GPa
|
|
RT Hardness (HRA)
|
91
|
-
|
|
RT Hardness (Vickers Hv0.3)
|
1350
|
Kg/mm2
|
|
Fracture Toughness K1C
|
8.0
|
MPa.m1/2
|
|
Density
|
6.13
|
g/cc
|
|
Porosity
|
0
|
%
|
|
Thermal Expansion Coefficient (0-1200°C)
|
10.0x10-6
|
K-1
|
|
RT Thermal Conductivity
|
2.0
|
W/m/K
|
|
Thermal Shock Resistance
|
250
|
ΔT°C quenched in cold water
|
|
Maximum Use Temperature
|
1000
|
°C
|
|
RT Electrical Resistivity
|
109
|
ohm m
|
Zircalon 10 - Mechanical, Thermal and Electrical Properties
The table below lists typical mechanical, thermal and electrical property data for Zircalon 10.
Table 2. Mechanical, thermal and electrical property data for Zircalon 10.
|
Property
|
Value
|
Unit
|
|
3 point RT Modulus of Rupture
(Specimen 3 x3 x 50mm, span 19.05mm)
|
1200
|
MPa
|
|
Weibull Modulus
|
15
|
-
|
|
RT Unit Tensile Strength
|
550
|
MPa
|
|
RT Compressive Strength
|
>2000
|
MPa
|
|
RT Young's Modulus of Elasticity
|
205
|
GPa
|
|
RT Hardness (HRA)
|
91
|
-
|
|
RT Hardness (Vickers Hv0.3)
|
1350
|
Kg/mm2
|
|
Fracture Toughness K1C
|
10.0
|
MPa.m1/2
|
|
Density
|
6.05
|
g/cc
|
|
Porosity
|
0
|
%
|
|
Thermal Expansion Coefficient (0-1200°C)
|
10.0x10-6
|
K-1
|
|
RT Thermal Conductivity
|
2.0
|
W/m/K
|
|
Thermal Shock Resistance
|
250
|
ΔT°C quenched in cold water
|
|
Maximum Use Temperature
|
1000
|
°C
|
|
RT Electrical Resistivity
|
109
|
ohm m
|
Corrosion Resistance of Zircalon
In addition to this outstanding property data, Zircalon also has excellent resistance to corrosion, often required for applications in the chemical and process industries.
The table below show the corrosion behaviour of Zircalon in various acids and alkalis.
Table 3. Zircalon corrosion behaviour in acids and alkalis.
|
Acid/Alkali
|
Conc. %
|
Temp.
|
Exposure time / hrs
|
Reaction
|
|
Acetic Acid
|
100
|
Boiling
|
100
|
None
|
|
Benzoic Acid
|
100
|
Boiling
|
100
|
None
|
|
Formic Acid
|
100
|
Boiling
|
100
|
None
|
|
Hydrochloric Acid
|
33
|
Boiling
|
100
|
None
|
|
Hydrofluric Acid
|
100
|
Boiling
|
100
|
Strong
|
|
Nitric Acid
|
69
|
Boiling
|
100
|
Weak
|
|
Phosphoric Acid
|
100
|
Boiling
|
100
|
Weak
|
|
Sulphuric Acid
|
98
|
Boiling
|
100
|
None
|
|
Ammonium Chloride
|
98
|
Boiling
|
100
|
None
|
|
Potassium Chloride
|
100
|
Boiling
|
100
|
None
|
|
Sodium Chloride
|
100
|
Boiling
|
100
|
None
|
|
Sodium hydroxide
|
50
|
Boiling
|
100
|
None
|
Summary on Zircalon Ceramic
The successful integration of ceramics into engineering systems requires close collaboration between you, the end-user, and ourselves, the material suppliers. Our Technical Department can be contacted to discuss your requirments in detail and assist in exploiting the significant advantages which Zircalon has to offer.
In addition, please visit International Syalons for guides on designing with ceramics and more property data comparing Zircalon with other engineering ceramics.
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This information has been sourced, reviewed and adapted from materials provided by Internatrional Syalons.
For more information on this source, please visit International Syalons.