A magnetostrictive Ni layer, plasma-sprayed onto a shaft, was used in conjunction with a pair of magnetic heads to measure the torque exerted on the shaft. Whereas the as-sprayed film had a high coercivity, annealing for two hours at from 500 to 1000°C lowered the coercivity, and caused the film to become magnetically more homogeneous. An example of the detection of transient fluctuations in the applied torque is also presented.
All Science Journal Classification (ASJC) codes
- Engineering (miscellaneous)