Abbrandfeste Iridium-Legierung für Zündkerzenelektroden

摘要: In order to ochieve longer service intervals and reduce the fuel consumption in automotive industry, noble metals especially erosion resistant, expensive platinum alloys are used for spark plug electrodes. Aim of this work is develop a cheaper, resistant iridium alloy The influence several alloying elements on resistance has been investigated. Iridium-chromium iridium-zirconium show small agoinst oxidation comparison pure iridium. addition titanium or aluminium slows down mass loss through but aggravates erosion. IrAl-inter-metallics builds protective Al 2 O 3 -scale nevertheless shows reduced against An improvement at atmospheric pressure achieved by adding niobium traces cerium RuAl intermetallics no measurable attack even high pressure.