Bonded ultrasonic transducer and method for making
An ultrasonic transducer is formed as a diffusion bonded assembly of piezoelectric crystal, backing material, and, optionally, a ceramic wear surface. The mating surfaces of each component are silver films that are diffusion bonded together under the application of pressure and heat. Each mating surface may also be coated with a reactive metal, such as hafnium, to increase the adhesion of the silver films to the component surfaces. Only thin silver films are deposited, e.g., a thickness of about 0.00635 mm, to form a substantially non-compliant bond between surfaces. The resulting transducer assembly is substantially free of self-resonances over normal operating ranges for taking resonant ultrasound measurements. 12 figs.
- Research Organization:
- University of California
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- Univ. of California, Office of Technology Transfer, Alameda, CA (United States)
- Patent Number(s):
- US 5,465,897/A/
- Application Number:
- PAN: 8-220,306
- OSTI ID:
- 131912
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ultrasensitive ultrasonic transducer studies
Non-bonded ultrasonic transducer