This study analyzes the mechanical properties, including the attrition rate, of 50 μm size yttria-stabilized zirconia (YSZ) beads with different microstructures and high-energy milling conditions. The yttria distribution in the grain and grainboundary of the fully sintered beads relates closely to Vickers hardness and the attrition rate of the YSZ beads. Grain size, fractured surfaces, and yttrium distribution are analyzed by electronic microscopes. For standardization and a reliable comparison of the attrition rate of zirconia beads with different conditions, Zr content in milled ceramic powder is analyzed and calculated by X-ray Fluorescence Spectrometer(XRF) instead of directly measuring the weight change of milled YSZ beads. The beads with small grain sizes sintered at lower temperature exhibit a higher Vickers hardness and lower attrition rate. The attrition rate of 50 μm YSZ beads is measured and compared with the various materials properties of ceramic powders used for high-energy milling. The attrition rate of beads appears to be closely related to the Vickers hardness of ceramic materials used for milling, and demonstrates more than a 10 times higher attrition rate with Alumina(Hv ~1650) powder than BaTiO3 powder (Hv ~315).

Abstracts
 1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
 4. 결 론
 References

• 김정환(한국기계연구원 부설 재료연구소 기능세라믹연구실) | Jung-Hwan Kim (Functional Ceramics Department, Korea Institute of Materials Science)
• 윤세중(한국기계연구원 부설 재료연구소 기능세라믹연구실/과학기술연합대학원 대학교 신소재공학 전공) | Sae-Jung Yoon (Functional Ceramics Department, Korea Institute of Materials Science/Advanced Materials Engineering, University of Science and Technology (UST))
• 한병동(한국기계연구원 부설 재료연구소 기능세라믹연구실/과학기술연합대학원 대학교 신소재공학 전공) | Byung-Dong Hahn (Functional Ceramics Department, Korea Institute of Materials Science/Advanced Materials Engineering, University of Science and Technology (UST))
• 안철우(한국기계연구원 부설 재료연구소 기능세라믹연구실) | Cheol-Woo Ahn (Functional Ceramics Department, Korea Institute of Materials Science)
• 윤운하(한국기계연구원 부설 재료연구소 기능세라믹연구실) | Woon-Ha Yoon (Functional Ceramics Department, Korea Institute of Materials Science)
• 최종진(한국기계연구원 부설 재료연구소 기능세라믹연구실) | Jong-Jin Choi (Functional Ceramics Department, Korea Institute of Materials Science) Corresponding author