| 摘要 |
<p>The invention relates to a layer (10, 3) for an electrical contact element (1). Electrical contact elements are generally coated and are in mechanical and electrical contact with a counter-contact element (7), whereby over long periods of time, a more or less strong mechanical pressure (9) is applied to the layer (10, 3) of the contact element (1). Generally, the layer (10, 3) is also subject to an internal mechanical pressure (9) without a counter-contact element (7). These pressure loads, in particular when tin is used, can lead to a growth of hair-like structures, which are also known as whiskers, from the layer (10, 3), which can cause short-circuits. Previous solutions always have unfavourable effects on other properties of the contact elements. An object of the invention is to provide a layer (10, 3) for an electrical contact element (1) which is mechanically stable, abrasion-resistant and highly electrically conductive and which, at the same time, prevents a growth of the hair-like structures known as whiskers. According to the invention, this is achieved by the layer (10, 3) containing bismuth and being tin-free.</p> |
