When the mean-free path of the atoms exceeded the length of the channel, the atomic density in the channel was constant in the central region and only changed at the ends, indicating the presence of contact resistance.
An example of a mechanical change is a change in tensile strength or surface hardness which is a required attribute in tooling industry.[10] Electroplating of acid gold on underlying copper- or nickel-plated circuits reduces contact resistance as well as surface hardness.
Features Stable contact resistance with evenly distributed oxides Improved durability with excellent welding resistance Excellent wear resistance and even erosion patterns have enabled lighter, thinner, and smaller contacts and contributed to a reduction in costs. Types.
Electrical products to large capacity, small size and direction, along with electrical products for heart device- electrical contact material put forward higher demands to the material under tremendous heat and arcing Joule heat, the melting does not occur good welding, mechanical wear and abrasion resistance, electrical properties; metal produced in the process of breaking splashes should not be excessive, arcing time not too long; in the current environment, good welding resistance, low and stable contact resistance.
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