{"title":"Thermo-mechanical coupling effect induced morphology evolution in laser stripping anti-erosion TiN coatings","authors":"","doi":"10.1016/j.optlastec.2024.111817","DOIUrl":null,"url":null,"abstract":"<div><p>Laser stripping has emerged as a pivotal technique for repairing anti-erosion coatings in the aviation and armored vehicle industries. This process entails complex thermodynamic interactions that remain incompletely explored. Unraveling the intricacies of the stripping mechanism, especially the evolution of surface morphology, is essential for advancing its industrial utility. This study characterizes the laser stripping effect on TiN anti-erosion coatings using confocal microscopy, scanning electron microscopy, and energy dispersive spectrometer. Notably, at an energy density threshold of approximately 10<sup>2</sup> J/cm<sup>2</sup>, pulsed lasers are observed to induce a distinctive hydrodynamic surface morphology, marked by parallel asymmetric grooves. This phenomenon is accompanied by a redistribution of surface elements and a decrease in nitrogen content. To dissect the underlying mechanisms, we have developed simulation models that integrate principles of heat transfer and fluid dynamics. These models reveal that the high-temperature decomposition and vaporization of TiN, coupled with the ejection of molten material due to vapor recoil pressure, are central to the stripping process. Additionally, the formation of asymmetric groove profiles is predominantly attributed to the nonlinear superposition effect from overlapping laser spots.</p></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":null,"pages":null},"PeriodicalIF":4.6000,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics and Laser Technology","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0030399224012751","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Laser stripping has emerged as a pivotal technique for repairing anti-erosion coatings in the aviation and armored vehicle industries. This process entails complex thermodynamic interactions that remain incompletely explored. Unraveling the intricacies of the stripping mechanism, especially the evolution of surface morphology, is essential for advancing its industrial utility. This study characterizes the laser stripping effect on TiN anti-erosion coatings using confocal microscopy, scanning electron microscopy, and energy dispersive spectrometer. Notably, at an energy density threshold of approximately 102 J/cm2, pulsed lasers are observed to induce a distinctive hydrodynamic surface morphology, marked by parallel asymmetric grooves. This phenomenon is accompanied by a redistribution of surface elements and a decrease in nitrogen content. To dissect the underlying mechanisms, we have developed simulation models that integrate principles of heat transfer and fluid dynamics. These models reveal that the high-temperature decomposition and vaporization of TiN, coupled with the ejection of molten material due to vapor recoil pressure, are central to the stripping process. Additionally, the formation of asymmetric groove profiles is predominantly attributed to the nonlinear superposition effect from overlapping laser spots.
期刊介绍:
Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication.
The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas:
•development in all types of lasers
•developments in optoelectronic devices and photonics
•developments in new photonics and optical concepts
•developments in conventional optics, optical instruments and components
•techniques of optical metrology, including interferometry and optical fibre sensors
•LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow
•applications of lasers to materials processing, optical NDT display (including holography) and optical communication
•research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume)
•developments in optical computing and optical information processing
•developments in new optical materials
•developments in new optical characterization methods and techniques
•developments in quantum optics
•developments in light assisted micro and nanofabrication methods and techniques
•developments in nanophotonics and biophotonics
•developments in imaging processing and systems