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.
Structural and electronic properties of laser irradiated pure iron / S., Polizzi; F., Antonangeli; Piacentini, Mario; M., De Crescenzi. - In: SOLID STATE COMMUNICATIONS. - ISSN 0038-1098. - STAMPA. - 50:3(1984), pp. 251-256. [10.1016/0038-1098(84)90806-8]
Structural and electronic properties of laser irradiated pure iron
PIACENTINI, Mario;
1984
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
