Development in Laser Peening of Advanced Ceramics

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

5 Citations (Scopus)

Abstract

Laser peening is a well-known process applicable to surface treat metals and alloys in various industrial sectors. Research in the area of laser peening of ceramics is still scarce and a complete laser-ceramic interaction is still unreported. This paper focuses on laser peening of SiC ceramics employed for cutting tools, armor plating, dental and biomedical implants, with a view to elucidate the unreported work. A detailed investigation was conducted with 1064nm Nd:YAG ns pulse laser to first understand the surface effects, namely: the topography, hardness, KIc and the microstructure of SiC advanced ceramics. The results showed changes in surface roughness and microstructural modification after laser peening. An increase in surface hardness was found by almost 2 folds, as the diamond footprints and its flaws sizes were considerably reduced, thus, enhancing the resistance of SiC to better withstand mechanical impact. This inherently led to an enhancement in the KIc by about 42%. This is attributed to an induction of compressive residual stress and phase transformation. This work is a first-step towards the development of a 3-dimensional laser peening technique to surface treat many advanced ceramic components. This work has shown that upon tailoring the laser peening parameters may directly control ceramic topography, microstructure, hardness and the KIc. This is useful for increasing the performance of ceramics used for demanding applications particularly where it matters such as in military. Upon successful peening of bullet proof vests could result to higher ballistic strength and resistance against higher sonic velocity, which would not only prevent serious injuries, but could also help to save lives of soldiers on the battle fields.

Original languageEnglish
Title of host publicationIndustrial Laser Applications Symposium, ILAS 2015
PublisherSPIE
Volume9657
ISBN (Electronic)9781628418705
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event4th Industrial Laser Applications Symposium - Kenilworth, United Kingdom
Duration: 17 Mar 201518 Mar 2015

Conference

Conference4th Industrial Laser Applications Symposium
Abbreviated titleILAS 2015
CountryUnited Kingdom
CityKenilworth
Period17/03/1518/03/15

Keywords

  • Ceramics
  • Hardness
  • K
  • Laser Peening
  • Microstructure
  • SiC
  • Surface finish

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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