250 Lbs Boron Carbide Abrasive Powder- Nuclear Grade - UK Abrasives Model NG44H

Description

For sale is a 250 lb drum of nuclear grade Boron Carbide powder. This was made by UK Abrasives. Model number NG44H.  Average particle size of this boron carbide is 44 micron.  It was always stored indoors in a sealed container. The product remains in excellent condition. Listing is for local pickup only but I will work with the buyer to arrange shipping. A small amount may have been used. This is an extremely fine powder. It has the feel of powdered sugar. Contact me with any questions.
Appearance (dry state):
Color
Black
• Chemical composition:
Chemical formula:
B4C Application
Grade
NG (Nuclear)
B + C min.
98
B (Boron) min.
76
C (Carbon) max.
24
B
2
O
3
0.1
Fe(Iron) max.
0.1
Si(Silicon)
0.01
N (Nitrogen)
0.5
Isotope B10 (atomic weight)
19.5-21.5%
•Physical data:
Knoop hardness(0.1)
3000
Mohs hardness
<9.5
Specific gravity:
2.51
Melting point:
2723 °F
Structure:
Monocrystalline
Boron is an important material for nuclear applications due to its high neutron absorption cross section (760 barn* at neutron velocity of 2200 m/sec). The cross section of the B10 isotope in boron is considerably higher (3800 barn). In addition, boron doesn’t contain decay products with a long half-life and high-energy secondary radioactive materials. Since pure boron is extremely brittle and difficult to produce in shapes (for example: control rods)
boron carbide is the material of choice
to use since it provides a high concentration of boron atoms in a strong and refractory form and is relatively easy to fabricate.