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http://dx.doi.org/10.14775/ksmpe.2013.12.6.023

Comparison of Ablation Characteristics of Carbon Nanotube reinforced Hybrid Al2O3 by using Ultrashort Pulse Laser  

Lee, Jun-Young (Pusan National Univ., Graduate School of Convergence Science)
Yoon, Ji-Wook (Korea institute of machinery & materials)
Kang, Myung-Chang (Pusan National Univ., Graduate School of Convergence Science)
Cho, Sung-Hak (Korea institute of machinery & materials)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.12, no.6, 2013 , pp. 23-29 More about this Journal
Abstract
In this paper, pure $I_{ph}$ and hybrid carbon nanotube reinforced $I_{ph}$ were sintered using the SPS(spark plasma sintering) method for high densification. A nanosecond laser (${\lambda}=1063nm$, ${\tau}P=10ns$) and a femtosecond laser (${\lambda}=1027nm$, ${\tau}P=380fs$) were installed on an optical system for the micromachining test. The ablation characteristics of the pure $I_{ph}$ and CNT/$I_{ph}$ 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/$I_{ph}$ 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/$I_{ph}$ was higher than that of pure $I_{ph}$.
Keywords
Carbon Nanotube; $Al_2O_3$; Hybrid Composites; Ultrashort Pulse Laser; Ablation Characteristics;
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