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http://dx.doi.org/10.14775/ksmpe.2016.16.1.036

Feasibility Evaluation of Micro Hole Drilling and the Material Properties of Si3N4/hBN Ceramic with hBN Contents  

Park, Kwi-Deuk (Gyeongnam Technopark LTD.)
Go, Gun-Ho (Samkee Automotive LTD.)
Lee, Dong-Jin (School of Convergence Science, Pusan UNIV.)
Kim, Jin-Hyeong (School of Convergence Science, Pusan UNIV.)
Kang, Myung Chang (School of Convergence Science, Pusan UNIV.)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.16, no.1, 2017 , pp. 36-41 More about this Journal
Abstract
In this paper, $Si_3N_4/hBN$ ceramics with various hexagonal boron nitride (hBN) contents (0, 10, 20, or 30 wt%) were fabricated via spark plasma sintering (SPS) at $1500^{\circ}C$, 50MPa, and 10m holding time. The material properties such as the relative density, hardness, and fracture toughness were systematically evaluated according to the hBN content in the $Si_3N_4/hBN$ ceramics. The results show that relative density, hardness, and fracture toughness continuously decreased as the hBN content increased. In addition, peak-step drilling (with tool diameter $500{\mu}m$) was performed to observe the effects of hBN content in micro-hole shape and cutting force. A machined hole diameter of $510{\mu}m$ (entrance) and stable cutting force were obtained at 30 wt% hBN content. Consequently, $Si_3N_4/30wt%$ hBN ceramic is a feasible material upon which to apply semi-conductor components, and this study is very meaningful for determining correlations between material properties and machining performance.
Keywords
Silicon Nitride; Boron Nitride; Spark Plasma Sintering; Micro-drilling; Machinability;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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