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BORON CARBIDE, CALCIUM HEXABORIDE AND TITANIUM DIBORIDE POWDERS AND GRAINS AS WEAR PROTECTION

BORON CARBIDE (B4C), CALCIUM HEXABORIDE (CaB6) AND TITANIUM DIBORIDE (TiB2) POWDERS AND GRAINS AS WEAR PROTECTION

Wear in the production process generates increased overheads and impairs quality. That is why we have developed the special additives:

  • TETRABOR® boron carbide (B4C)
  • Titanium diboride (TiB2)
  • Calcium hexaboride (CaB6)

In the ceramics industry, plant engineering and the chemical and construction industries, these additives protect technical plants and machines permanently and securely against wear as a result of chemical reactions, extreme heat and high pressures.

Properties

Thanks to the effectiveness of ESK’s boron carbide (B4C), calcium hexaboride (CaB6) and titanium diboride (TiB2) materials, our powders and grains feature some impressive properties:

  • Extreme hardness
  • High chemical resistance
  • Outstanding heat resistance
  • High boron content

Applications

  • Constituent of electrode materials for wear protection
    The extreme hardness of our materials makes them ideally suited for wear protection in welding and thermal spraying.
  • For sintering and hot pressing
    Among other applications, for the sintering and hot pressing of powders and grains in the production of wear-resistant articles and plates.
  • For boriding
    Boriding is a wear protection process in which extremely wear-resistant boride coatings are applied by the diffusion of boron atoms into the metal surface.
fileadmin/esk/plain/tetrabor_b4c-e.html

Boron Carbide
Material properties Norm Symbol/Unit TETRABOR®
Density DIN EN 623-2 ρ [g/cm3] >2.48
Porosity DIN EN 623-2 P [%] <0.5
Mean grain size [μm] <15
Aspect ratio (L/D) -
Phase composition B4C, C
Vickers hardness DIN EN 843-4 HV 1 [GPa] 31
Knoop hardness DIN EN 843-4 HK 0.1 [GPa] 29
Young's modulus DIN EN 843-2 E [GPa] 420
Weibull modulus DIN EN 843-5 m 15
Flexural strength, 4-pt bending DIN EN 843-1 σB [MPa] 450
Compressive strength σD [MPa] >2800
Poisson ratio ν 0.15
Fracture toughness (SENB) Klc [MPa·m0,5] 5
Coefficient of thermal expansion DIN EN 821-1
20°C - 500°C α [10-6/K] 4.5
500°C - 1000°C α [10-6/K] 7.2
Specific heat at 20°C DIN EN 821-3 cp [J/g K] 1
Thermal conductivity at 20°C DIN EN 821-2 λ [W/m K] 40
Thermal stress parameters calculated
R1 = σB·(1-ν) / (α·E) [K] 202
R2 = R1·λ [W/mm] 8
Specific electrical
resistance at 20°C		 DIN EN 50359 ρ [Ω cm] 1
fileadmin/esk/plain/titandiborid_tib2-e.html
Material properties Norm Symbol/Unit Titanium Diboride
Density DIN EN 623-2 ρ [g/cm3] >4.50
Porosity DIN EN 623-2 P [%] <1.5
Knoop hardness DIN EN 843-4 HK 0.1 [GPa] 25.6
Young's modulus DIN EN 843-2 E [GPa] 575
Flexural strength, 4-pt bending DIN EN 843-1 σB [MPa] 500
Weibull modulus DIN EN 843-5 m 16
Poisson ratio ν 0.11
Klc (SENB) Klc [MPa·m0,5] 8.0
Coefficient of thermal expansion DIN EN 821-1
20°C - 500°C α [10-6/K] 6.7
500°C - 1000°C α [10-6/K] 8.2
Thermal conductivity DIN EN 821-2
at 50°C λ [W/m K] 54
Specific electrical
resistance at 20°C		 ρ [Ω cm] 2·10-5