On the Thermal Expansion Coefficient and the Temperature Coefficient of Young’s Modulus of Cobalt and Palladium Alloys

The thermal expansion and Young’s modulus of the cobalt and palladium alloys have been measured in the temperature range from 0° to 990°C with a dilatometer and by means of a vibrator-controlled oscillator system, respectively, and it has been found that the mean linear thermal expansion coefficient (0°∼40°C) shows maximum value in the α phase alloy containing 90%Pd which has a ferromagnetic Curie point of 150°C and the mean temperature coefficient of Young’s modulus (0°∼40°C) shows a positive value in the concentration range of 90.5∼95%Pd, and its largest positive value is +59.78×10−5 in the alloy containing 94% palladium.