Knowledge about the erosion mechanisms of spark plug materials is of fundamental interest for the development of materials with a high resistance against electrode erosion. Endurance tests were performed to study the wear behaviour of platinum, iridium, silver and nickel as electrode materials for spark plugs between 200 and 900 °C. Oxidation must be the dominating mechanism, irrespective of the material. Additional calculations resulted in the suggestion of a plasma‐assisted oxidation process.
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Rager et al. (2005) studied this question.
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