Cutting Efficiency and Mechanical Characteristics of Diamond Micro-blades Containing WS2 Lubricant
WS2 윤활제를 첨가한 마이크로 다이아몬드 블레이드의 절삭성능과 기계적 특성
김송희;장재철;
Kim, Song-Hee;Jang, Jae-Cheol;
강원대학교 신소재공학과;
Department of Advanced Materials Engineering, Kangwon National University;
DOI : 10.5695/JKISE.2012.45.1.037
$WS_2$ powder was added to the Cu/Sn bond metal of diamond micro-blades for machining of semi-conductor and IC chips to improve cutting efficiency. The effect of $WS_2$ additive on cutting efficiency was investigated and compared with the micro-blades with $MoS_2$ developed in previous research. Flexural strength, frictional coefficient, and wear resistance of blades decreased with $WS_2$ but wear depth increased. It was found that the blades including $WS_2$ consumed less momentary energy than the blades containing $MoS_2$ during dicing test. Micro-blades containing $WS_2$ exhibited lower flexural strength than the blades with $MoS_2$ resulting from higher amount of sintering defects relevant to the less effectiveness of $WS_2$ on fluidity. The effect of $WS_2$ and $MoS_2$ on fluidity during sintering was analyzed in terms of mismatching degree between the longitudinal direction of lubricant particles and the perpendicular direction to the compact loading. The blade with 8.1 vol.% of $WS_2$ showed the best cutting efficiency.
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