✦ LIBER ✦

The elastic constants of the constituent phases of dental amalgam

✍ Scribed by Grenoble, Dale E. ;Katz, J. Lawrence

Publisher: John Wiley and Sons
Year: 1971
Tongue: English
Weight: 454 KB
Volume: 5
Category: Article
ISSN: 0021-9304
DOI: 10.1002/jbm.820050506

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✦ Synopsis

The pressure variat.ions of the elastic constants of the con~tit~uerit phases of dental amalgam (r-Ag,Sn, rl-Ag2T€gs, and rz-HgSri,. 8) were investigated in the 0-50 kilobar range. The velocit#ies of propagation of longit,udiiial and transverse ultrasonic waves were measured using an ult>rasonic interferometer and a solid media pressure apparatus. Colnput,er analysis yields the pressure dependence of the bulk modulus, shear modulus, Young's modulus, and Poisson's ratio; atmospheric pressure values are obtained by back extrapolat,ion from the high pressure measurements. The values of these elastic constants are relat,ed to the crystallographic structures of the individual alloys. The possibility of high pressure first order polymorphic transitions in and -ye is also discussed.

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