Silver Metcar is a silver impregnated, carbon-graphite material useful for electrical
applications that require low resistance, low voltage drop and low electrical
noise. 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 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.
Ships, aircraft, rail systems and other
applications that require low electronic interference use the Silver Metcar
material for dc motor brushes, non-welding electrical contacts and rotary slip
ring brushes or contacts. Applications include air traffic control radars,
telecommunications systems and satellite communications systems.
What makes this movie stand out from the typical high school sports story is that the teenagers are undocumented immigrants, and the big game is a NASA-sponsored marine robotics competition. Like many other Hollywood movies, however, Spare Parts only tells part of the story. What the film shows -- and doesn’t show -- raises important issues affecting STEM education in the US.
Instead of sifting through huge amounts of technical data looking for answers to assembly problems, engineers can now benefit from 3M's new initiative -- 3M Assembly Solutions. The company has organized its wealth of adhesive and tape solutions into six typical application areas, making it easier to find the best products to solve their real-world assembly and bonding problems.
Load dump occurs when a discharged battery is disconnected while the alternator is generating current and other loads remain on the alternator circuit. If left alone, the electrical spikes and transients will be transmitted along the power line, leading to malfunctions in individual electronics/sensors or permanent damage to the vehicle’s electronic system. Bottom line: An uncontrolled load dump threatens the overall safety and reliability of the vehicle.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.