Melt depth prediction during the high power diode laser treatment of selected building materials

A. A. Peligrad, J. Lawrence, E. Zhou, L. Li, D. Morton

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


The development of an accurate analysis procedure for many laser applications, including the surface treatment of building materials, is extremely complicated due to the multitude of process parameters and materials characteristics involved. A one-dimensional analytical model based on Fourier’s law, with quasi-stationary situations in an isotropic and inhomogeneous workpiece with a parabolic meltpool geometry being assumed, was successfully developed. This model, with the inclusion of an empirically determined correction factor, predicted high power diode laser (HPDL) induced melt depths in clay quarry tiles, ceramic tiles and ordinary Portland cement (OPC) that were in close agreement with those obtained experimentally. It was observed, however, that as the incident laser energy density increased (> 15 W mm−1 s−1/2), the calculated and the experimental melt depths began to diverge at an increasing rate. It is believed that this observed increasing discrepancy can be attributed to the fact the model developed neglects sideways conduction which, although it can be reasonably neglected at low energy densities, becomes significant at higher energy densities since one-dimensional heat transfer no longer holds true.
Original languageEnglish
Title of host publicationICALEO 2000 : proceedings of the Laser Materials Processing Conference
Place of PublicationUnited States
PublisherLaser Institute of America
Number of pages10
ISBN (Print)9780912035628
Publication statusPublished - 1 Oct 2000
Externally publishedYes


Dive into the research topics of 'Melt depth prediction during the high power diode laser treatment of selected building materials'. Together they form a unique fingerprint.

Cite this