Fabrication of porous Si3N4 ceramics with controlled porosity by milling of fibrous α-Si3N4 powder Influence of zircon on cristobalite crystallization of

Zhaoyun Xu; Yaming Zhang; Bo Wang; Jian-feng Yang; Kaikai Liu

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자료유형: 학술저널

저자정보: Zhaoyun Xu (Xi’an Jiaotong University) Yaming Zhang (Xi’an Jiaotong University) Bo Wang (Xi’an Jiaotong University) Jian-feng Yang (Xi’an Jiaotong University) Kaikai Liu (Xi’an Jiaotong University)

저널정보: 한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제17권 제8호

발행연도: 2016.8

수록면: 840 - 844 (5page)

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Porous Si3N4 ceramics with varied porosities were prepared by liquid phase sintering of fibrous α-Si3N4 powder with differentmorphology after ball milling. The influence of the ball milling time on porosity, shrinkage, microstructure and mechanicalproperties of Si3N4 ceramics were investigated. With increasing of the ball milling time from 0 h to 24 hrs, the mean length andaspect ratio of the fibrous α-Si3N4 particles decreased dramatically, resulting in the porosity of porous Si3N4 ceramics decreasedfrom 55.6% to 19.3%. With the decreased length of the fibrous α-Si3N4 particles, microstructures with decreased aspect ratioof β-Si3N4 grains were formed, as a result of increased nuclei number and limited grain growth of the β-Si3N4 grains. Theflexural strength varied from 62 MPa to 205 MPa could be obtained attributed to the synergy effect of porosity andmicrostructure.

#Fibrous α-Si3N4 #Porous ceramics #Porosity #Flexural strength

참고문헌 (27)

참고문헌 신청

Jialiang Li / 2011 / Dielectric properties of silicon nitride ceramics prepared by low temperature spark plasma sintering technique / Journal of Ceramic Processing Research 12(3):236~239

G. J. Zhang / 2001 / J. Am. Ceram. Soc 84:1395~1397

X. M. Li / 2012 / Mater. Sci. & Eng. A 549:43~49

F. Chen / 2007 / J. Am. Ceram. Soc 90:2379~2383

C. Kawai / 1997 / J. Am. Ceram. Soc 80:2705~2708

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