Metallized Carbon Corporation Announces Silver Metcar Material
Ideal for brushes and contacts in rotating antennas within satellite communication systems
December 10, 2012
Metallized Carbon Corporation, a global leader in the manufacture of oil-free, self-lubricating, carbon-graphite materials for
severe service lubrication applications, announces that it produces
a silver impregnated, carbon-graphite material
useful for electrical applications that require low resistance, low voltage drop, and low electrical noise. The material is ideal
for DC motor brushes, non-welding electrical contacts, and rotary slip ring brushes or contacts in air traffic control radars,
telecommunications systems, and
satellite communications systems.
Low noise slip rings assemblies, known as rotary joints, microwave rotary couplings, and RF rotary joints, are used to transmit
minute electrical signals in rotating equipment like microwave antennas, radar receivers, sonar receivers, rotating thermocouples
read-outs, and rotating strain gauge read-outs.
“With the growth of in-flight and at-sea television and internet service, we are seeing a huge increase in demand for the material
for use in antennas used to track satellites,” said Matthew Brennan, Chief Operating Officer of Metcar. “Ships, aircraft, rail
systems, and other applications that require low electronic interference will find that Silver Metcar is an excellent choice.”
The carbon-graphite in Silver Metcar provides self-lubricating properties and the pure silver provides high and constant electrical
conductivity. The material is corrosion resistant, dimensionally stable and has a heavy overload capacity. Additives to the
carbon-graphite base material improve its self-lubricating properties in the dry atmospheres that occur at high altitude and in
space. Silver Metcar cannot melt or weld to another metal surface because the carbon-graphite base material will not melt.
It can be silver plated so that it can be easily soldered to metal parts such as leaf springs or conventional brush holders.
To make the Silver Metcar materials, solid carbon-graphite base materials, in rings or blocks, are submerged in pure,
molten silver and the silver is forced into the porosity of the carbon-graphite material using extremely high gas pressure.
Most of the Silver Metcar grades contain approximately fifty percent silver by weight. X-ray inspection is used to ensure that
each Silver Metcar part is uniformly impregnated with silver.
About Metallized Carbon Corporation
Since its inception in 1945, Metallized Carbon Corporation has been manufacturing high-quality, dependable bearing solutions
for severe operating environments. With over 50 years of Application Engineering experience, Metallized Carbon offers the field
expertise and data necessary to provide The Solid Choice for Lubrication® in a wide variety of industries, supplying completely
machined components as well as materials for customer machining. Metallized Carbon is ISO certified and produces the Metcar brand
of solid, oil-free, self-lubricating materials.
For additional information about the company and its services, please visit us online at