Metallography of temperature characteristic of terbium based rare earth magnetostriction alloy and mechanical compensation

摘要

The magneto-striction type actuator which is improved the complicated electronic type device necessity do with the combination of magnetostriction alloy constitution and preload value, has the temperature response which is improved as the one for automobile like the fuel injector. The fuel injector has, the entrance port (118), the substance and the exit port nearby metrical expedient which possess the fuel passage which extends from the exit port and the entrance port to the exit port (104) with, metrical expedient the magnetostriction element which is in operation contact relationship (116) with, as for constitution of the magnetostriction element, essentially, chemical formula with Tb _{xDy1-xFe y}, x from approximately 0.31 inside approximately 0.33 ranges, in addition y is the Telecom phenol -D alloy inside approximately 2.2 ranges from approximately 1.8.