The surface of a pure iron sample irradiated with a high power pulsed laser has been studied by UHV electron spectroscopies in the reflection mode (AES, EELS and EELFS) in order to verify the experimental hint of a laser induced non-crystalline surface layer. Our results point out that the local arrangement of atoms in the laser irradiated surface is not disorder-like: no significant differences in structural and electronic properties between irradiated and non-irradiated samples have been detected in the short-range limit (up to the fourth coordination shell). This result agrees with a theoretical computer calculation which predicts, for pure metals, a cooling rate of the order of 1010 K sec-1 after the laser pulse, not sufficient to avoid recrystallization. © 1984.
Structural and electronic properties of laser irradiated pure iron
POLIZZI, Stefano;
1984-01-01
Abstract
The surface of a pure iron sample irradiated with a high power pulsed laser has been studied by UHV electron spectroscopies in the reflection mode (AES, EELS and EELFS) in order to verify the experimental hint of a laser induced non-crystalline surface layer. Our results point out that the local arrangement of atoms in the laser irradiated surface is not disorder-like: no significant differences in structural and electronic properties between irradiated and non-irradiated samples have been detected in the short-range limit (up to the fourth coordination shell). This result agrees with a theoretical computer calculation which predicts, for pure metals, a cooling rate of the order of 1010 K sec-1 after the laser pulse, not sufficient to avoid recrystallization. © 1984.
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