Characterization and compositional study of fibre laser processed engineering ceramics

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

1 Citation (Scopus)

Abstract

Surface treatment by means of fibre laser radiation using various processing gas compositions was conducted on cold isostatic pressed (CIP) Si3N4 and ZrO2 engineering ceramics to observe changes in their surface integrity, chemical composition and distribution of the heat affected zone (HAZ). The as received and fibre laser treated surface topography was measured in 3D using white-light interferometry (WLI). Scanning electron microscopy (SEM) was then used to observe the microstructural integrity prior to and after the fibre laser treatment. Energy dispersive X-ray (EDX) was employed thereafter to detect the change in the chemical composition. Surface melting and distribution of the melt zone was found with all treated samples of Si3N4 and ZrO2. The surface finish and the material removal varied with using the various gas compositions. Fibre laser processing with N2 on Si3N4 proved to be the most influential in effecting morphology changes, whilst Ar with ZrO2 ceramics in order to locally melt and redistribute the top layer of ZrO 2 ceramics, producing a better bondage of the grain boundaries. However, the maximum materials removal was found with using O2 gas with both ceramics particularly with Si3N4 as the surface profile of the treated zone was completely modified. Effect of oxidation occurred with all samples but was less for ZrO2 ceramics in comparison with that of the Si3N4.

Original languageEnglish
Title of host publicationICALEO 2009 - 28th International Congress on Applications of Lasers and Electro-Optics, Congress Proceedings
PublisherLaser Institute of America
Pages122-132
Number of pages11
ISBN (Print)9780912035598
Publication statusPublished - 1 Dec 2009
Externally publishedYes
Event28th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2009 - Orlando, United States
Duration: 2 Nov 20095 Nov 2009

Publication series

NameICALEO 2009 - 28th International Congress on Applications of Lasers and Electro-Optics, Congress Proceedings
Volume102

Conference

Conference28th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2009
CountryUnited States
CityOrlando
Period2/11/095/11/09

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Shukla, P. P., & Lawrence, J. (2009). Characterization and compositional study of fibre laser processed engineering ceramics. In ICALEO 2009 - 28th International Congress on Applications of Lasers and Electro-Optics, Congress Proceedings (pp. 122-132). (ICALEO 2009 - 28th International Congress on Applications of Lasers and Electro-Optics, Congress Proceedings; Vol. 102). Laser Institute of America.