Abstract
In this paper, pure <TEX>$I_{ph}$</TEX> and hybrid carbon nanotube reinforced <TEX>$I_{ph}$</TEX> were sintered using the SPS(spark plasma sintering) method for high densification. A nanosecond laser (<TEX>${\lambda}=1063nm$</TEX>, <TEX>${\tau}P=10ns$</TEX>) and a femtosecond laser (<TEX>${\lambda}=1027nm$</TEX>, <TEX>${\tau}P=380fs$</TEX>) were installed on an optical system for the micromachining test. The ablation characteristics of the pure <TEX>$I_{ph}$</TEX> and CNT/<TEX>$I_{ph}$</TEX> composites, such as thermal effect and ablation depth, were investigated using FE-SEM and a confocal microscope device. Laser machining results for the two mating materials showed improved performances: CNT/<TEX>$I_{ph}$</TEX> composites showed good surface morphology of hole drilling without a melting zone due to the composites' high thermal properties; also, the ablated depth of CNT/<TEX>$I_{ph}$</TEX> was higher than that of pure <TEX>$I_{ph}$</TEX>.
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