Product: Boron Carbide, B4C, b4c boron carbide
Main composition: Boron Carbide(B4C)
Grain and Powder: F12-F1200 for bonded
P12-P2500 for coated
Standard: FEPA,...
Superhard Abrasives
Your Professional Superhard Abrasives Supplier
Master Abrasive is a leading Chinese manufacturer specializing in the production of high-quality abrasive materials and related tools. We are committed to delivering superior and consistently reliable products at competitive prices.
Rich Experience
Established in 2000, our factory, Jin Jing Chuan Abrasive, has accumulated over two decades of experience in manufacturing abrasive materials.
Free Samples
We offer complimentary samples to new customers for product evaluation.
Competitive Price
We provide high-quality and stable abrasive materials and related tools at highly competitive prices.
Sales Market
Our products are distributed globally, with a presence in key markets including the United States, Japan, Europe, South America, and various regions across Asia.
Parameter
|
Properties |
Units |
Value |
|
Physical |
||
|
Chemical Formula |
- |
B4C |
|
Density, r |
g/cm3 |
2.51 |
|
Color |
- |
Black or dark gray |
|
Crystal Structure |
- |
Hexagonal |
|
Water Absorption |
% @R.T. |
ng |
|
Hardness |
Vickers @ R.T. (GPa) |
36 |
|
Hardness |
Knoop (kg/mm2) |
ng |
|
Mechanical |
||
|
Compressive Strength |
GPa @ R.T. |
2.9 |
|
Tensile Strength |
MPa@980þC |
155 |
|
Modulus of Elasticity (Young's Mod.) |
GPa@ R.T |
445 |
|
Flexural Strength (MOR) |
MPa @ R.T. |
375 |
|
Poisson's Ratio, u |
@R.T. |
0.19 |
|
Fracture Toughness, KIc |
MPa x m1/2 |
ng |
|
Thermal |
||
|
Max. Use Temperature (* denotes inert atm.) |
ºC |
2450 |
|
Thermal Shock Resistance |
DT (ºC) |
ng |
|
Thermal Conductivity |
W/m-K @ R.T. |
28 |
|
Coefficient of Linear Thermal Expansion, al |
10-6 K-1 (~25ºC through ±1000ºC) |
5.54 |
|
Specific Heat, cp |
J kg-1 K-1 @ R.T. |
945 |
Types of Superhard Abrasives
01.
Cubic Boron Nitride (CBN)
The same team that made synthetic diamonds created Cubic Boron Nitride or CBN. Similar to diamond making, CBN goes through a process called sintering. CBN has similar properties to diamond but with superior thermal and chemical stability, making it more suitable to cut super-hardened steel and metals.
02.
Diamond
Professionals can use diamond as a cutting tool to cut non-metallic materials such as granite, gorilla glass, concrete, and ceramic tiles. For example, diamond coated jigsaw blades can cut precision holes in granite for sink hardware. The strength and precision of the blade make it ideal for creating precise features. Used in a CNC milling machine, a diamond-tipped contour tool cuts the slots and grooves in gorilla glass on smartphones as well. Diamond’s properties make it ideal for close tolerance and cutting and grinding with precision.
Advantages of Superhard Abrasives
Superior Surface Finishing
In surface finishing applications, superhard abrasive stands out due to its high abrasion resistance. It imparts a smooth, polished finish to a variety of materials, enhancing their aesthetic appeal and functional performance.
Exceptional Cutting Capabilities
Superhard abrasive’s exceptional hardness allows it to cut through materials with high precision. It is commonly used in water jet cutting and other applications where precision and speed are paramount.
Enhanced Grinding Efficiency
In grinding operations, superhard abrasive’s superior hardness and thermal stability enable it to maintain sharp cutting edges, leading to improved grinding efficiency and reduced tool wear.
Applications of Superhard Abrasives
While the list of industries that use superabrasives is extensive. There are a few industries that are known for being heavy users.
● Oil industry
● Medical
● Aerospace
● Composites
● Automotive
● Electronics
These industries typically manufacture with delicate materials like silicone or very hard materials like metals.
Chemical Properties of Superhard Abrasives
Oxidation resistance
When superhard abrasive is heated to 1300°C in air, a protective layer of silicon dioxide begins to form on the surface of its superhard abrasive crystals. As the protective layer thickens, it prevents the internal superhard abrasive from continuing to be oxidized, which makes superhard abrasive have better oxidation resistance. When the temperature reaches 1900K (1627℃) or higher, the silica protective film begins to be destroyed and the oxidation of the superhard abrasive intensifies, so 1900K is the maximum working temperature of superhard abrasive in an oxidizer-containing atmosphere.
Acid and alkali resistance
In terms of resistance to acids, alkalis and oxides, superhard abrasive is highly resistant to acids and alkalis due to the role of silica protective film.
Physical and Mechanical Properties of Superhard Abrasives
Density
The particle density of various superhard abrasive crystalline forms is very close, generally considered to be 3.20 g/m³, and the natural bulk density of its superhard abrasive abrasives is between 1.2 – 1.6 g/m³, the height of which depends on the particle size number, particle size composition and particle shape.
Hardness
The Mohs hardness of superhard abrasive is 9.2, the Weiss microdensity hardness is 3000–3300 kg/m³, the Nuptial hardness is 2670-2815 kg/mm, which is higher than corundum and second only to diamond, cubic boron nitride and boron carbide in abrasives, and its wear resistance is more than ten times that of alloy just and wear-resistant cast iron.
Thermal conductivity
The thermal conductivity of superhard abrasive products is very high, the thermal conductivity of more than 12, the coefficient of thermal expansion is small, high thermal shock resistance, is a high-quality refractory materials.
Superhard Abrasives Notes
● Feeding environment as far as possible for sealed, so that it is not easy to fall into large particles with the air flow.
● Rotten packaging of superhard abrasive micro powder as far as possible not to use, rotten packaging may have been mixed with impurities, affecting the cutting effect.
● The use of slurry should control the use of tools to prevent cross-use pollution.
● Ready to throw the material slurry to avoid storage for too long, if too long will produce united matter, but also the formation of false particles, may bring to the line cutting.
Packaging and Shipping
|
Packaging |
● 25 kgs/PVC Bag with plastic inner bag. ● 1MT /Jumbo Bag ● 25 kgs/PVC Bag,40Bags/Jumbo Bag ● Other customized package are available |
|
Shipping |
We will help you to choose the best shipping way according to your detail requirements. By sea, by air, or by express, etc. |
Our Factory
Master Abrasive is a professional manufacturer of the abrasive materials in China. We focus on providing the good stable quality abrasive materials and related abrasive tools with competitive price. More than 23 years experience in the abrasive industry, we will be your reliable and trustable partner.
FAQ
We're well-known as one of the leading superhard abrasives manufacturers and suppliers in China. Please feel free to buy high quality superhard abrasives made in China here from our factory. For price consultation, contact us.
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