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Micro-Pattern Machining Characteristics Evaluation of $Si_3N_4$-hBN based Machinable Ceramics Using Powder Blasting Process  

박동삼 (인천대학교 기계공학과)
조명우 (인천대학교 기계공학)
김동우 (인천대학교 기계공학과 대학)
조원승 (인천대학교 재료공학부)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.13, no.2, 2004 , pp. 33-39 More about this Journal
Abstract
Sandblasting has recently been developed into a powder blasting technique for brittle materials. In this study, the machinability of $Si_3N_4$-hBN based machinable ceramics are evaluated for micro - pattern making processes using powder blasting. Material properties of the developed machinable ceramics according to the variation of h-BN contents give a good machinability to the ceramics. The effect of scanning times, the size of patterns and variation of BN contents on the erosion depth of samples without mask and samples with different mask patterns in powder blasting of $Si_3N_4$-hBN ceramics are investigated. The Parameters are the impact angle of $90^{\circ}$, the scanning times of nozzle up to 40, and the stand-off distances of 100mm The widths of masked pattern are 0.1mm 0.5mm and 1mm. The powder used is Alumina particles, WA#600. and the blasting pressure of powder is 0.2MPa. Through required experiments, the results are investigated and analyzed. As the results, the machinability of the developed ceramics increases as the BN contents in the ceramics.
Keywords
Powder Blasting Machinability; Machinable Commies; Masking Process; Erosion Depth;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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