Formation of a columnar topography on Al/sub 2/O/sub 3/-TiC ceramic after KrF laser machining

Author

Oliveira, V. ; Mendes, M. ; Vilar, Ruth

Author_Institution

Dept. de Engenharia de Mater., Inst. Superior Tecnico, Lisbon, Portugal

fYear

2000

fDate

10-15 Sept. 2000

Abstract

Summary form only given. Columnar and cone-like topographies have been observed after irradiation with multiple nanosecond laser pulses on a wide variety of materials including ceramics, polymers, metals and semiconductors. Although there is a lot of literature on this subject, very little information about column internal structure and composition is available Here, we present transmission electron microscopy analysis of the core of columns formed after excimer laser ablation of Al/sub 2/O/sub 3/-TiC ceramic composite. These results help us understanding the mechanisms of column growth.

Keywords

alumina; ceramics; laser ablation; laser beam machining; titanium compounds; transmission electron microscopy; Al/sub 2/O/sub 3/-TiC; Al/sub 2/O/sub 3/-TiC ceramic; Al/sub 2/O/sub 3/-TiC ceramic composite; KrF laser machining; ceramics; column composition; column growth mechanism; column internal structure; columnar topography formation; cone-like topographies; excimer laser ablation; metals; multiple nanosecond laser pulses; polymers; semiconductor; transmission electron microscopy analysis; Ceramics; Information analysis; Inorganic materials; Optical materials; Optical pulses; Polymers; Semiconductor lasers; Semiconductor materials; Surfaces; Transmission electron microscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Europe, 2000. Conference Digest. 2000 Conference on

Conference_Location

Nice

Print_ISBN

0-7803-6319-1

Type

conf

DOI

10.1109/CLEOE.2000.910066

Filename

910066