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ZrO2增韧陶瓷的研究进展 总被引:6,自引:0,他引:6
综述了ZrO2陶瓷及添加氧化物稳定剂对四方相氧化锆的稳定性影响,以及ZrO2陶瓷材料的种类,增韧机理及其主要应用领域,并展望了氧化锆增韧陶瓷的研究发展趋势。 相似文献
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ZrO2 ceramic was made from evenly dispersed ( Y, Ce )-ZrO2 powder with different composi-tions, which was prepared by the chemical coprecipitation, and stabilized by compound additions through appropri-ate techniques. And its mechanical property that is related to the phase content and its microstntcatre 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. TheFEfore, 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 mecMnical properties originates from the toughening of microcrack, phase transformation and the effect of grain e-vulsions. 相似文献
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(Y,Ce)-ZrO2增韧92Al2O3陶瓷的研究 总被引:5,自引:0,他引:5
采用自制均匀分散的(1.5Y,4Ce)-ZrO2微粉,通过适当工艺和92Al2O3复合,提高了92Al2O3陶瓷的韧性和强度.最后采用X-射线衍射分析、扫描电镜分析研究了该样品的机械性能与烧成制度、相组成及微观结构的关系.结果表明:92Al2O3陶瓷性能的提高归因于ZrO2的应力诱导相变增韧,并且当(1.5Y,4Ce)-ZrO2微粉的加入量为20%(质量分数)时,试样在1550℃烧成时,材料的抗弯强度、断裂韧性以及硬度得到了很好的改善. 相似文献
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