Minoru Takahashi1, Yuji Ueda2, Katuhiko Sudo3 and Yoshiharu Naruse4
1Department of Applied Physics, Faculty of Engineering, Tohoku University, Sendai
A thermal expansion measurement apparatus was designed in order to measure the thermal expansion characteristics of ribbon specimens of 10∼50 μ m thickness and of thin wires of less than 0.1 mm diameter. The differential transformer and balancing method was used for the apparatus.
Thermal expansion curves were measured in the temperature range 77∼800 K by changing the weight applied to the specimens and by changing the heating rate in order to find the most suitable measuring condition.
The shape of the thermal expansion curves varied remarkably with the applied weight. The most suitable weight to measure the thermal expansion was 1.5∼2.5 MPa. The magnetostriction for amorphous Fe83B17 alloys was measured by appling a magnetic field of 3 A/m.
Please do not copy without permission.