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Title: Bonded ultrasonic transducer and method for making

Abstract

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.

Inventors:
 [1];  [1];  [2]
  1. (Los Alamos, NM)
  2. (Santa Fe, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
870152
Patent Number(s):
5465897
Assignee:
Regents of University of California, Office of Technology (Alameda, CA) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
bonded; ultrasonic; transducer; method; formed; diffusion; assembly; piezoelectric; crystal; material; optionally; ceramic; wear; surface; mating; surfaces; component; silver; films; application; pressure; heat; coated; reactive; metal; hafnium; increase; adhesion; deposited; thickness; 00635; form; substantially; non-compliant; bond; resulting; free; self-resonances; normal; operating; ranges; taking; resonant; ultrasound; measurements; operating range; resonant ultrasound; mating surface; active metal; substantially free; ultrasonic transducer; reactive metal; transducer assembly; normal operating; piezoelectric crystal; wear surface; mating surfaces; diffusion bonded; fusion bond; sound measurement; /228/

Citation Formats

Dixon, Raymond D., Roe, Lawrence H., and Migliori, Albert. Bonded ultrasonic transducer and method for making. United States: N. p., 1995. Web.
Dixon, Raymond D., Roe, Lawrence H., & Migliori, Albert. Bonded ultrasonic transducer and method for making. United States.
Dixon, Raymond D., Roe, Lawrence H., and Migliori, Albert. Sun . "Bonded ultrasonic transducer and method for making". United States. https://www.osti.gov/servlets/purl/870152.
@article{osti_870152,
title = {Bonded ultrasonic transducer and method for making},
author = {Dixon, Raymond D. and Roe, Lawrence H. and Migliori, Albert},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}

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