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In the present work, silicon nitride was fabricated with Y₃Al?O<SUB>12</SUB> as a sintering additive and its mechanical properties were investigated. Silicon nitride with 3, 5, and 7 wt% of Y₃Al?O<SUB>12</SUB> was prepared and sintered by a Hot Pressing (HP) technique at 1750 and 1800 ℃ for 2h. The process was performed under different process pressures of 30 and 45 ㎫. Mechanical properties (density, strength, hardness, and fracture toughness) were investigated as a function of the Y₃Al?O<SUB>12</SUB> content in Si₃N₄. Si₃N₄- Y₃Al?O<SUB>12</SUB> ceramics showing similar mechanical properties compared with Si₃N₄-Y₂O₃-Al₂O₃ ceramics. But its high temperatures strength was considerably higher than that of Si₃N₄-Y₂O₃-Al₂O₃ ceramics.
목차
ABSTRACT
1. 서론
2. 실험 방법
3. 실험결과
4. 결론
참고문헌
참고문헌 (10)
참고문헌 신청
1. [학술지(정기간행물)] - / 1978 / Journal of American Ceramic Society 61 : 114 ~ 118
2. [학술지(정기간행물)] - / 2005 / Fracture Toughness of Liquid Phase Sintered SiC by Using Indentation Fracture Method 297-300 : 137 ~ 142
3. [학술지(정기간행물)] - / 1975 / Equilibrium Penny-like Cracks in Indentation Fracture 10 : 2016 ~
4. [학술지(정기간행물)] - / 1994 / Sintering of Y2O3-Al2O3 Doped β-Si3N4 Powder and Mechanical Properties of Sintered Materials Journal of Ceramic Society 102 : 791 ~ 795
5. [학술지(정기간행물)] - / 1985 / Strength and Microstructure of Sintered Si3N4 with Rare-earth-oxide Additions 64 : 304 ~ 309
2. [학술지(정기간행물)] - / 2005 / Fracture Toughness of Liquid Phase Sintered SiC by Using Indentation Fracture Method 297-300 : 137 ~ 142
3. [학술지(정기간행물)] - / 1975 / Equilibrium Penny-like Cracks in Indentation Fracture 10 : 2016 ~
4. [학술지(정기간행물)] - / 1994 / Sintering of Y2O3-Al2O3 Doped β-Si3N4 Powder and Mechanical Properties of Sintered Materials Journal of Ceramic Society 102 : 791 ~ 795
5. [학술지(정기간행물)] - / 1985 / Strength and Microstructure of Sintered Si3N4 with Rare-earth-oxide Additions 64 : 304 ~ 309
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UCI(KEPA) : I410-ECN-0101-2009-559-016206769