Title

Modulation of diffusion with polarized lasers

Authors

Authors

S. Y. Chen; O. Benafan; R. Vaidyanathan;A. Kar

Comments

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Abbreviated Journal Title

Appl. Phys. A-Mater. Sci. Process.

Keywords

PLATINUM; BEAMS; BASE; Materials Science, Multidisciplinary; Physics, Applied

Abstract

Laser diffusion is generally used to modify the metallurgical composition at the surface of materials for improving the mechanical properties. Platinum has been diffused into titanium and tantalum sheets in this study, and the concentrations of Pt in the substrates are determined. The concentration of Pt is higher at lower scanning speeds due to higher surface temperature and longer diffusion time than in the case of higher scanning speeds. Additionally, the samples treated with a linearly polarized laser beam exhibit slightly higher concentration of Pt. The enhanced diffusion in the case of linearly polarized laser treatment can be attributed to controlled excitation of the local vibration modes of the atoms in the substrate. The reflectivity of the samples are also measured at the wavelength of 1,064 nm and compared with theoretical results.

Journal Title

Applied Physics a-Materials Science & Processing

Volume

116

Issue/Number

2

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

703

Last Page

713

WOS Identifier

WOS:000339337200032

ISSN

0947-8396

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