Nickel Top Hat Single Crystal

Nickel Top Hat Single Crystal represents a specialized geometry of nickel single crystal designed to provide both structural uniformity and experimental versatility. The single-crystal nature ensures the absence of grain boundaries, which minimizes creep, enhances oxidation resistance, and delivers highly consistent mechanical behavior. This form is especially valuable in aerospace and turbine research, where single-crystal nickel alloys underpin the development of next-generation high-temperature superalloys. Specific applications include model systems for creep testing, studies of dislocation network evolution, and prototype evaluation of crystal growth technologies. The unique “top hat” geometry allows precise mounting in experimental setups, enabling advanced research in materials science and mechanical behavior under extreme conditions. Its critical role lies in facilitating controlled scientific investigations and innovation in high-performance alloy design, establishing its importance in both academic and industrial materials engineering.

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Tolerance

Properties

Reference & Citations

Health hazard/Hazardous to the ozone layer

Serious health hazard

each

Tolerances

Single Crystal

Orientation		See Item
Thickness		+2% / -1%
Length		+2% / -1%

Top Hat

Inside Diameter		+2% / -1%
Outside Diameter		+2% / -1%
Bottom Section Thickness		+2% / -1%
Top Section Thickness		+2% / -1%

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	28
Crystal structure	Face centred cubic
Electronic structure	Ar 3d⁸ 4s²
Valences shown	0, 1, 2, 3
Atomic weight( amu )	58.69
Thermal neutron absorption cross-section( Barns )	4.54
Photo-electric work function( eV )	4.9
Natural isotope distribution( Mass No./% )	60/ 26.10
Natural isotope distribution( Mass No./% )	62/ 3.59
Natural isotope distribution( Mass No./% )	61/ 1.13
Natural isotope distribution( Mass No./% )	58/ 68.27
Natural isotope distribution( Mass No./% )	64/ 0.91
Atomic radius - Goldschmidt( nm )	0.125
Ionisation potential( No./eV )	2/ 18.2
Ionisation potential( No./eV )	4/ 54.9
Ionisation potential( No./eV )	6/ 108
Ionisation potential( No./eV )	1/ 7.63
Ionisation potential( No./eV )	3/ 35.2
Ionisation potential( No./eV )	5/ 75.5

Mechanical Properties

Element	Value
Hardness - Brinell	190
Hardness - Brinell	100
Material condition	Hard
Material condition	Soft
Poisson's ratio	0.312
Poisson's ratio	0.312
Bulk modulus( GPa )	177.3
Bulk modulus( GPa )	177.3
Tensile modulus( GPa )	199.5
Tensile modulus( GPa )	199.5
Izod toughness( J m⁻¹ )	160
Izod toughness( J m⁻¹ )	160
Tensile strength( MPa )	400
Tensile strength( MPa )	660
Yield strength( MPa )	150
Yield strength( MPa )	480

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	6.9@20@20°C
Temperature coefficient( K⁻¹ )	0.0068@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	-1.48

Physical Properties

Element	Value
Boiling point( C )	2732
Density( gcm⁻³ )	8.9@20
Density( gcm⁻³ )	8.9@20C

Thermal Properties

Element	Value
Melting point( C )	1453
Latent heat of evaporation( J g⁻¹ )	6378
Latent heat of fusion( J g⁻¹ )	292
Specific heat( J K⁻¹ kg⁻¹ )	444@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	90.9@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	13.3@0-100°C