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Microstructure and Nanoindentation Properties of Surface Textures Obtained by Laser Machining and Molding in Silicon Carbide

“…If the shape results from primary removal as in the present case, the vaporization front may assume the shape of the energy distribution across the beam, which is ideally a Gaussian profile. [12] Different from the molding technique, by changing the laser parameters, one can also tailor the shape of the hole, obtaining conical or cylindrical shapes with various sizes and depths. …”

“…Surface textures, such as regular arrays of holes, can markedly improve the tribological properties of silicon carbide-based components by enhancing its lubricating properties. [1,2] Laser machining is a flexible and non contact technique particularly suited for obtaining surface patterns, [3][4][5][6][7][8][9][10][11][12][13][14][15][16] and fabricating small diameter or high aspect ratio holes at designated locations. The possibility of controlling the technological parameters of radiation makes it possible to obtain unique surface structures and tailor the surface properties of the final products.…”

“…[3][4][5][6][7][8][9][10][11][12][13][14][15][16] In this work, a pattern of holes in dense SiC components was obtained by both conventional molding and Nd:YAG laser machining. The component is a standard liquid phase sintered SiC, containing low percentages of sintering aids.…”

“…The effects of laser machining of SiC has been reported by several authors that recorded a number of interesting features resulting from interaction between the laser beam and the ceramic, such as melting, vaporization, solidification of debris around the holes, as well as an extended heat affected zone (HAZ). [10][11][12][13][14][15][16] The purpose of this work is the evaluation of the effective damage induced by laser machining in the so-called HAZ through both microstructural investigations and nanoindentation tests in the area around the hole. In this respect, nanoindentation is a particularly suitable technique to locally characterize the material mechanical properties.…”

Effects of laser parameters on microgrooves morphology of SiC/SiC composites fabricated by femtosecond laser

“…It has great advantages in surface micro-nano manufacturing and surface processing, as well as in damage and precision control [11] . Tuersley et al demonstrated the feasibility of laser processing ceramic matrix composite materials by using millisecond laser to process SiC/SiC [12] . Chen et al studied the laser ablation mechanism of SiC/SiC composite materials by combining experiments with COMSOL temperature field simulation [13] .…”