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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.11
- 수록면
- 4,601 - 4,617 (17page)
- DOI
- 10.1007/s12540-020-00650-8
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초록· 키워드
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Silicon nitride (Si3N4) based cermets are very popular due to their versatile applications like high temperature engine parts,cutting tools, refractory and structural applications. Here, in this work, Si3N4?Mo (Si3N4 as matrix and molybdenum asreinforcement) and Si3N4?Mo?Si (Si3N4 as matrix, Mo and Si as reinforcement) cermets are fabricated through powder metallurgyroute and phase evolution, micro-structure and mechanical properties are analyzed. Three initial powder compositionsof 90Si3N4?10Mo (S90M10), 75Si3N4?25Mo (S75M25) and 75Si3N4?15Mo?10Si (SMS) (all in wt%) are prepared throughplanetary milling and total additive amount of 5, 10 and 15 wt% of Y2O3and Al2O3are mixed (equal wt ratio of each) withmilled base powder, cold compacted and followed by conventional pressure-less sintering at 1500 °C for 1 h. The effects ofadditives and reinforcements on phase evolution, microstructure and mechanical properties are discussed. From XRD andSEM analysis of sintered pellets, the presence of molybdenum silicide (i.e. Mo3Si,Mo5Si3and MoSi2)in all the cermetsis confirmed. It has been observed that the relative density and hardness values are increased with the increase in additivewt%. Comparing all the cermets, 75Si3N4?15Mo?10Si with 10 wt% additives has shown the maximum compression strengthand fracture toughness of 134.2 MPa and 8.89 ± 0.34 MPa.m1/2 respectively. The maximum relative density of 75.24% isobserved in S90M10and hardness of 8.81 ± 0.13 GPa is found in S75M25both cermets containing 15 wt% of additives. Thetransformation from α- to β- Si3N4is observed in all the cermets after sintering.
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참고문헌 (41)
참고문헌 신청
M.J. Hofmann / 2016 / Si3N4-Ceramics, Structure and Properties of / Ref. Modul. Mater. Sci. Mater. Eng
Ahmad Sayyadi-Shahraki / 2019 / Densification and mechanical properties of spark plasma sintered Si3N4/ZrO2 nano-composites / Journal of Alloys and Compounds 776:798~806
Sushree Sefali Mishra / 2019 / Effect of Y2O3 and Al2O3 sintering additives during fabrication of Si3N4–Mo–Si cermet by conventional pressure-less sintering / Ceramics International 45(16):20555~20565
Takuma Takahashi / 2016 / Fabrication of c-axis oriented Si3N4 ceramics using multilayered-graphene-coated β-Si3N4 seeds and their orientation in an innovative low magnetic field / Advanced Powder Technology 27(5):2005~2011
J.A. Hawk / 1997 / Abrasive wear of Si3N4MoSi2 composites / Wear 203-204:247~256
Ahmad Sayyadi-Shahraki / 2019 / Densification and mechanical properties of spark plasma sintered Si3N4/ZrO2 nano-composites / Journal of Alloys and Compounds 776:798~806
Sushree Sefali Mishra / 2019 / Effect of Y2O3 and Al2O3 sintering additives during fabrication of Si3N4–Mo–Si cermet by conventional pressure-less sintering / Ceramics International 45(16):20555~20565
Takuma Takahashi / 2016 / Fabrication of c-axis oriented Si3N4 ceramics using multilayered-graphene-coated β-Si3N4 seeds and their orientation in an innovative low magnetic field / Advanced Powder Technology 27(5):2005~2011
J.A. Hawk / 1997 / Abrasive wear of Si3N4MoSi2 composites / Wear 203-204:247~256
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