A Plating Manganin Piezoresistance Gauge

The magnetically controlled cathode plasma sputtering technique has been successfully used to manufacture a plating-type manganin piezoresistance gauge on a mica matrix plate. Calibration experiments under pressures 5 to 6 GPa show that the piezoresistance behavior is well-reproduceable. The pressure-piezoresistance fit of the gauge can be written as p(GPa)=-0.14+90.63(R/R0)+10.81(R/R0)2-7.64(R/R0)3, here, R0 is the initial resistance of the gauges, R the resistance increment under shock loading.