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Kinetics of the dhcp-fcc phase transformation in La under pressure

✍ Scribed by B. Merkau; W.B. Holzapfel

Publisher
Elsevier Science
Year
1986
Weight
133 KB
Volume
139-140
Category
Article
ISSN
0378-4363

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✦ Synopsis

The kinetics of the dhcp-fcc phase transformation in La was investigated at several points on the phase boundary employing a diamond-anvil type high pressure cell with an energy-dispersive X-ray diffraction system in the pressuretemperature region between 0-4.6 GPa and 20-125Β°C. Pressures were determined by the ruby-fluorescence method.

The data of the growth of the fcc and dhcp phases with time were fitted with the Avrami equation (and analyzed according to classical nucleation and growth theory). The region of indifference (hysteresis widths) was determined by linear extrapolation of the values of 1/.r vs pressure.

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