MANUFACTURE OF EARTH ELECTRODE FOR SPARK PLUGPURPOSE: To provide a manufacturing method which can highly accurately manufacture an earth electrode having an asymmetrical section in an earth electrode for spark plug using a composite material.ANDO MINORU...
In general, rare earth elements will become the second phase in the composites with different chemical properties from the matrix, such as elemental and oxide. The second phase in the matrix can control the uniformity of microstructure and significantly hinder the movement of the grain boundary and...