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Momentive Performance Materials BNC2 Boron Nitride (BN) Refractory Composite

Category Ceramic , Nitride
Manufacturer Momentive Performance Materials (Former GE Advanced Ceramics)
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Momentive Performance Materials BNC2 Boron Nitride (BN) Refractory Composite.pdf
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Material Notes:
Boron Nitride is a unique engineering material. It is a soft, machinable ceramic which can be combined with other refractory ceramics including Aluminum Oxide, Silicon Nitride, Aluminum Nitride, Mullite and Titanium Diboride. This results in composites which are machinable, thermal shock resistant, and chemically compatible in a wide range of environments. In combination with Titanium Diboride, for example, BN can be used as a heating source for the aluminum metallization of films and papers. BN composites are also used as break-rings in the horizontal continuous castings of steel and nozzles in rapid solidification processes. Other composite applications include the following: High temperature refractory shapesGlass forming tools and refractoriesMolds, dies and refractories for metalformingFurnace vents, stacks and fixturesGrades BNC 1 & 2 offer excellent corrosion and wear resistance, have excellent thermal shock capability and low CTE, are non-wetting and are self lubricating.Information provided by Momentive Performance Materials, formerly GE Advanced Ceramics.
Physical Properties Metric English Comments
Density 2.85 g/cc
0.103 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell A 86
86
No Scale Listed, Perpendicular
93
93
No Scale Listed, Parallel
Modulus of Elasticity 20.7 GPa
3000 ksi
Perpendicular
66.9 GPa
9700 ksi
Parallel
Flexural Strength 22.1 MPa
3200 psi
Parallel
46.2 MPa
6700 psi
Perpendicular
21.4 MPa

@Temperature 1500 °C
3100 psi

@Temperature 2730 °F
Parallel
33.8 MPa

@Temperature 1500 °C
4900 psi

@Temperature 2730 °F
Perpendicular
Compressive Strength 77.9 MPa
11300 psi
Perpendicular
128 MPa
18600 psi
Parallel
Coefficient of Friction, Dynamic 0.73
0.73
pin-on-disk at 450° C in argon, nickel static substrate, sliding velocity 0.5m/sec, 2N load, Perpendicular
0.76
0.76
pin-on-disk at 450° C in argon, nickel static substrate, sliding velocity 0.5m/sec, 2N load, Parallel
Abrasion 0.018
0.018
mm<sup>3</sup>/N/m, Wear Rate, Parallel
0.099
0.099
mm<sup>3</sup>/N/m, Wear Rate, Perpendicular
Thermal Properties Metric English Comments
CTE, linear 8.30 µm/m-°C

@Temperature 20.0 °C
4.61 µin/in-°F

@Temperature 68.0 °F
Parallel
CTE, linear, Transverse to Flow 6.50 µm/m-°C

@Temperature 23.0 °C
3.61 µin/in-°F

@Temperature 73.4 °F
Thermal Conductivity 10.8 W/m-K
75.0 BTU-in/hr-ft²-°F
Parallel
26.5 W/m-K
184 BTU-in/hr-ft²-°F
Perpendicular
4.50 W/m-K

@Temperature 1500 °C
31.2 BTU-in/hr-ft²-°F

@Temperature 2730 °F
Parallel
8.00 W/m-K

@Temperature 500 °C
55.5 BTU-in/hr-ft²-°F

@Temperature 932 °F
Parallel
10.7 W/m-K

@Temperature 1500 °C
74.3 BTU-in/hr-ft²-°F

@Temperature 2730 °F
Perpendicular
18.6 W/m-K

@Temperature 500 °C
129 BTU-in/hr-ft²-°F

@Temperature 932 °F
Perpendicular
Maximum Service Temperature, Air 950 °C
1740 °F
Oxidizing
Maximum Service Temperature, Inert 1500 °C
2730 °F
Inert/Vacuum
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