The Strain Gauge Factor and Electrical Properties in Nonmagnetic Amorphous Cu-Ag-P Alloys

The strain gauge factor K at room temperature, the electrical resistivity ρ at 20°C and its mean temperature coefficient Cf, and the mean thermal electromotive force Emf in the temperature range of 0° to 40°C have been measured with ribbons of amorphous Cu-Ag-P alloys. Compared with conventional strain gauge materials, these amorphous alloys exhibit comparable K(1.8∼3.1), high ρ (135.6∼154.3×10−8 Ω·m), negative Cf(−0.67∼−1.23×10−4/°C) and low Emf(1.02∼1.07 μV/°C). From the above results, these amorphous alloys are expected to serve as strain guage alloys below the crystallization temperatures.