Cemented carbide surface modifications using laser treatment and its effects on hard coating adhesion

Improvement of coating adhesion on cemented carbide tools by plasma etching

“…In addition to mechanical treatments, laser texturing and plasma etching can modify the tool's surfaces. The first treatment was studied by Neves et al [2,11] and Arroyo et al [10], who investigated the influence of laser treatment on the surface morphology, surface structure and coatings cemented carbide adhesion. According to these researches, laser treatment produced a surface with adhesion strength comparable to commercial tools pretreated by micro-sandblasting.…”

Laser Surface Texturing For Antiviral Surfaces?

“…Despite the current lack of literature on the fabrication of antiviral surfaces by LST, these promising results underline the possibility of using ultrafast lasers in achieving an ideal surface topography favorable wettability (superhydrophobic), feature size (smaller than the virus size), and feature shape (that promotes adhesion resistance) to realize antiviral surfacesthat effectively resist, repel and kill the virus particles. Also, laser processing has been used to enhance the adhesive strength of coatings in multiple applications [53,54]. This hybrid approach can also be adapted to improve the mechanical strength and long-term stability of superhydrophobic coatings typically used for producing antiviral surfaces.…”

Cemented Tungsten Carbide Hardmetal-An Introduction

“…Subsequently, surface pretreatments are often employed in both PVD and CVD processes to modify the chemistry, morphology, or roughness of the WC-Co surfaces. These pretreatments are sometimes used in combination, and include mechanical, chemical, and thermal methodologies, as well as laser ablation and the application of interlayers (Arroyo, Diniz, & Fernandes de Lima, 2010). As an example, Bouzakis et al recently investigated the effects of different nanointerlayers (W, Cr, and Ti deposited by high-power pulsed magnetron sputtering) for PVD coatings of AlTi(N) with varied surface roughness .…”