Effects of SiO2 and ZrO2 Additives on Microstructure and Properties of Al2O3 Ceramic

Yi Hua Li; De Chang Jia; Zhi Hua Yang; Yu Zhou

doi:10.4028/www.scientific.net/MSF.745-746.523

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HomeMaterials Science ForumMaterials Science Forum Vols. 745-746Effects of SiO2 and ZrO2 Additives on...

Effects of SiO₂ and ZrO₂ Additives on Microstructure and Properties of Al₂O₃ Ceramic

Abstract:

Alumina ceramic, with high mechanical strength, good electric insulation, high hardness and good corrosion resistance performance, has been widely used in machinery, electronic and electrical, chemical, medicine, construction and other high-tech areas. In this study, both silicon sol and zirconia particles are incorporated into the system and dense alumina composite ceramics were prepared by cold isostatic processing and pressureless sintering at 1550 . The influence of additives on phase composition, microstructure and mechanical properties were investigated. The XRD results show that mullite phase was generated in the composite ceramic. The composite ceramic has excellent comprehensive performance. For example, the sample with 3wt.% SiO₂ and 5wt.% ZrO₂ has density of 3.87g·cm^-3, Vickers hardness of 17.6GPa, flexural strength of 369.0MPa, youngs modulus of 374.2GPa and fracture toughness of 3.57MPa·m^1/2.

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Periodical:

Materials Science Forum (Volumes 745-746)

Pages:

523-527

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.745-746.523

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Online since:

February 2013

Authors:

Yi Hua Li, De Chang Jia, Zhi Hua Yang, Yu Zhou

Keywords:

Al₂O₃, Composite Ceramic, SiO₂, Zro₂

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References

[1] N. Claussen, Fracture toughness of Al2O3 with an unstabilized ZrO2 dispersed phase[J], J Am Ceram Soc. 59(1) (1976) 49-51.

Google Scholar

[2] M. Kihara, T. Ogata, K. Nakamura, et al., Effect of Al2O3 additions on mechanical properties and microstructure of Y-TZP[J], J Ceram Soc Jpn. 96 (1988) 635-642.

Google Scholar

[3] D.W. Shin, K.K. Orr, H. Schubert, Microstructure mecha nical property relationship in hot isostatically pressed alumina and zirconia toughened alumina[J], J Am Ceram Soc. 73(5) (1990) 1181-1188.

DOI: 10.1111/j.1151-2916.1990.tb05177.x

Google Scholar

[4] J. Kishino, A. Nishiyama, T. Sakuma, Mechanical properties of sinter forged Al2O3-ZrO2 ceramics[J], J Mater Sci. 31 (1994) 4991-4995.

DOI: 10.1007/bf00355892

Google Scholar