Excimer laser induced surface nitriding of aluminium alloy

This study describes a technique for the growth of thin nitride layer on aluminium alloy samples by direct laser synthesis with the advantages of good adhesion and localisation. The laser irradiation process is performed using an XeCl excimer laser ( λ=308 nm, 50 Hz) under a nitrogen atmosphere. The...

Full description

Saved in:
Bibliographic Details
Published in:Applied surface science 1998-05, Vol.127, p.726-730
Main Authors: Sicard, E, Boulmer-Leborgne, C, Sauvage, T
Format: Article
Language:English
Subjects:
Laser application
Laser produced plasma
Nitride
Surface hardening
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study describes a technique for the growth of thin nitride layer on aluminium alloy samples by direct laser synthesis with the advantages of good adhesion and localisation. The laser irradiation process is performed using an XeCl excimer laser ( λ=308 nm, 50 Hz) under a nitrogen atmosphere. The laser induced plasma interacts with the melted sample surface resulting in nitrogen atom diffusion and reaction into the depth of the sample. Plasma spots were overlapped by two dimensional laser beam displacement to ensure the complete coating of the surface with a specified laser fluence (1.6 J/cm 2) and number of pulses (500), while not removing of the nitride layer already synthesised. Under these conditions, the diffusion layer penetrates a few μm deep, but its crystalline quality is preserved. Interesting information on the layer formation and composition are drawn from nuclear analysis (RBS and NRA) to determine the nitrogen and oxygen (contaminant) concentration profiles.
ISSN:0169-4332
1873-5584
DOI:10.1016/S0169-4332(97)00732-0