Mechanical properties of ZrO2 ceramic stabilized by Y2O3 and CeO2

被引：0

作者：

Ming-qing Y. ^{[1
]}

Shi-gang F. ^{[1
]}

Lian-meng Z. ^{[2
]}

Shu-zhen S. ^{[2
]}

机构：

[1] Research Institute of Synthetic Crystals

[2] Wuhan University of Technology, Wuhan

来源：

Journal of Wuhan University of Technology-Mater. Sci. Ed. | 2002年 / 17卷 / 2期

关键词：

Compound additions; Mechanical properties; Stabilization technique;

D O I：

10.1007/BF02832612

中图分类号：

学科分类号：

摘要：

ZrO2 ceramic was made from evenly dispersed (Y, Ce)-ZrO2 powder with different compositions, which was prepared by the chemical coprecipitation, and stabilized by compound additions through appropriate techniques. And its mechanical property that is related to the phase content and its microstructure was studied by X-ray diffraction(XRD), scan electron microscope(SEM). The results show that Y2O3 has stronger inhibition to the growth of ZrO2 crystal than CeO2 has. Therefore, within an appropriate composition range of Y2O3 and CeO2, the higher the content of Y2O3, the lower the content of CeO2, the smaller ZrO2 crystal. Combining this feature and the stabilization technique with complex additions instead of simple addition, ZrO2 ceramic with high density and excellent mechanical properties can be made under normal conditions. It is concluded that the improvement of mechanical properties originates from the toughening of microcrack, phase transformation and the effect of grain evulsions.

引用

页码：14 / 18

页数：4

共 17 条

[1]

Nettleship, Stevens R., Tetragonal zirconia polycrystal (TZP) - A review, Int. J. High Technol. Ceram., pp. 31-32, (1987)

[2]

Jianfen W., Xiaohong X., Guomei W., Surface electrical properties and structure of yttria-partially-stabilized zirconia implanted with 57Fe ions, Journal of Wuhan University of Technology-Mater. Sci. Ed., 15, 3, (2000)

[3]

Tsukuma K., Ueda K., Shimada M., Strength and fracture toughness of isostaticaily hot-pressed composites of Al2O3 and Y2O3-partiaily-stabilezed ZrO2, J. Am. Ceram. Soc., 68, pp. c4-c5, (1985)

[4]

Lange F.F., Dunlop G.L., Davis B.I., Degration during aging of trasformation-toughened ZrO2-Y2O3 materials at 250°C, J. Am. Ceram. Soc., 69, 3, (1986)

[5]

Xi-Yun H., Xiaoxian H., Yueping X., Yi L., Nanyun S., Mechanism and control of degradation of Y-TZP ceramics in hydrothermal conditions, Journal of Inorganic Materials, 11, 2, (1996)

[6]

Duh J.G., Dai H.T., Chiou B.S., Sintering, microstructure, hardness, and fracture toughness behavior of Y2O3-CeO2-ZrO2, J. Am. Ceram. Soc., 71, 10, (1988)

[7]

Duh J.G., Lee M.Y., Fabrication and sinter ability in Y2O3-CeO2-ZrO2, J. Mater. Sci., 24, 12, (1989)

[8]

Duch J.G., Wan J.U., Developments in highly toughened Y2O3-CeO2-ZrO2 ceramic system, J. Mater. Sci., 27, 2, (1992)

[9]

Wan J.U., Dah J.G., Effects of pH value and compact pressure on coprecipitated Y2O3-CeO2-ZrO2, J. Mater. Sci. Lett., 12, (1993)

[10]

Kaiming L., Kofen G., Shouren G., Chuanshui S., Toughening mechanisms and fracture characteristics of ZrO2 in ZTA ceramics, Journal of the Chinese Ceramic Society, 23, 5, (1995)

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