Autumn machining 한국정밀공학회 Materials & Design 정밀공학회 포스터 JKSPE 춘계학술대회 Glassy Carbon 춘계 학술대회 Conference VC 2024 2018 Ceramic zirconia ZrO2 Micro grinding 실리콘 웨이퍼 Silicon WC DISCRIM PRESM Vitreous Carbon EDM Silicon Wafer Characteristic Soda Lime GC 2025 KSPE IJAMT Microgrinding international journal of advanced manufacturing technology edge PRESM2025 실리콘 micro AMT elsevier 유리질 탄소 cemented carbide Soda-lime 유리질탄소