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Friction Materials-Sintered

Metal-ceramic bronze-graphite friction material with high content of ceramic components and graphite, designed for a dry friction use.

 

Material characteristics :

  • High co-efficient of friction
  • High wear resistance
  • The lining is solidly joint to its steel base pad by the layer of connecting material
  • Good thermal stability up to 450°C, for a short term up to 800°C
  • Small effect on the opposite surface
  • Suitable for grinding, drilling and recess work
  • Friction co-efficient stability in a wide range of operating conditions

Typical area of use :

Suitable as a dry friction material for medium and heavy workloads, e.g. disc brakes for the aircraft or for a heavy earth machinery.

Recommended operating conditions :

Specific pressure :  p < 3.5 MPa
Sliding speed  : v < 40 m.g-1
Temperature sustained : 450°C
Short term temperature : 800°C
Friction surface : steel, cast iron, cast steel

Friction data :

Dynamic coeff. of friction fdyn : 0.350 – 0.550
Static coeff of friction fstat  : 0.450 – 0.530

Physical – Mechanical characteristics :

Density  :  γ = 4.6 g/cm3
Specific heat : c = 5.1kJ/kg.K
Coeff. of thermal conductivity : λ = 4.0 W/m.K
Co-eff of thermal expansion : α* = 17.6 x 10-6/K
Modulus of elasticity  : Ep = 393 MPa (under compress.)
Tensile strength :  δdt = 26MPa
Shearing strength : δds = 53MPa

*α(20-500°C)

Friction characteristics :

The course of the friction coefficient, specific abrasive wear and temperature were measured on the laboratory testing bench under the following conditions.

Specific pressure  :  p = 0.5 – 3.0 MPa
Sliding speed : v = 10 – 30 m.s-1
Friction surface :  special cast iron CNMCH

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