Table 1.

Material selection considerations for transducer components.

Transducer Component	Transducer Type	Purpose	Candidate Materials	Elevated Temperature	Gamma Radiation Resistance
Permanent magnets	EMAT and MST	Generate a static magnetic field	Rare earth alloys like neodymium, samarium cobalt	Select carefully	Good
Electrical coil	EMAT and MST	Provide an alternating electric field	Metal conductors like copper, silver	Good	Good
Backing	EMAT and MST	Electrical insulation for coil	Polymers like Polyimide, peek	Select carefully	Select carefully
Magneto-strictive foil	MST	Energy conversion	Ferrous metals and alloys like remendur, iron	Good	Good