Laser ultrasonic monitoring of ceramic sintering

Journal Article · Fri Dec 14 23:00:00 EST 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.346895· OSTI ID:6363889

Telschow, K L; Walter, J B; Garcia, G V ^[1]

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1. Idaho National Engineering Laboratory, EG G Idaho, Incorporated, Idaho Falls, Idaho 83415-2209 (USA)

Noncontacting laser-ultrasonic measurements of the sintering of ceramics in real-time are described. Lasers are used for both generation and detection of ultrasonic waves propagating through the material. A pulsed laser generates the ultrasonic wave from thermoelastic absorption at the material surface. Detection is accomplished by a confocal Fabry--Perot interferometer, which is insensitive to the speckle nature of the scattered light from the sample surface and can obtain measurements from samples with rough or diffusely reflecting surfaces. The densification of the ceramic sample is determined by changes in the bulk longitudinal wave velocity and the sample shrinkage.

• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6363889
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 68:12; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ACOUSTIC MONITORING
CERAMICS
ELASTICITY
ELECTROMAGNETIC RADIATION
FABRICATION
FABRY-PEROT INTERFEROMETER
INTERFEROMETERS
LASER RADIATION
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
MONITORING
PULSES
RADIATIONS
SINTERING
SOUND WAVES
TENSILE PROPERTIES
THERMOELASTICITY
ULTRASONIC WAVES