Surface modification of ceramic matrix composites induced by laser treatment

Surface treatment effects on ceramic matrix composites: Case of a thermal sprayed alumina coating on SiC composites

“…A cone-like structure can be observed, which becomes more important as the number of laser impact increases. This trend agrees with what has been reported in literature [17][18][19][20]. Image analysis on the cross-sections was used to measure the height of the peaks, which was found to vary between 2 and 5 μm.…”

“…5 shows the cross-section of the samples coated after the laser treatment. No fracture occurs at the interface treated by 250 laser impacts whereas cracks can be observed after 100 laser pulses [20]. A correlation between the surface roughness and the coating-substrate interface quality can also be easily detected as already demonstrated by several authors [21][22][23][24].…”

“…An evolution of the surface composition has been detected. By implementing EDS and RMS analyses on the peaks, a lower content of carbon at the outer surface has been demonstrated after the laser treatment [20]. By Monte-Carlo simulation, it was possible to estimate 0.15 μm depth analysed which corresponds to the evolution of the extreme surface depth (outer surface) and on one peak.…”

Studies of the Iranian medieval ceramics surface modified by pulsed tea CO2 and Nd:YAG lasers

“…The laser ablation treatment avoids most of drawbacks characteristic for conventional processes (treatment in several steps, use of solvents, etc.). The exact nature of the material ablation by laser irradiation depends on the used material and laser processing parameters [25][26][27][28][29][30][31][32][33][34][36][37][38].…”

“…Nevertheless, apart from these shortcomings, the advantages of laser application in cleaning ancient ceramics surface encrustations are evident [1,2,10,[25][26][27][28][29][30].…”