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首页> 外文会议>2012 7th International Forum on Strategic Technology. >Structure and mechanical properties of ZrO2 (MgO) — CaSiO3 composites
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Structure and mechanical properties of ZrO2 (MgO) — CaSiO3 composites

机译：ZrO2（MgO）-CaSiO3复合材料的结构和力学性能

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摘要

Composites based on zirconium and wollastonite has structural properties, which combines good mechanical properties, thermal resistance and high hardness, as well as the ability to withstand considerable compressive stress. The developed techniques improve the toughness provide for the inclusion of wollastonite (CaSiO3) fiber “whiskers” the increase in fiber content improves strength and toughness, the volume of wollastonite (CaSiO3) 1–25%. Sintering is the process of processing used to produce materials with controlled density and details of the ceramic. Raising the temperature led to an increase in the density of ceramic composites, a structure that combines the high mechanical properties, thermal resistance and high hardness, as well as the ability to withstand considerable compressive stress. It is shown that the maximum density and hardness is achieved at the sintering temperatures 1400–1500 °C, thus there is a transformation of tetragonal zirconia in a mixture of three phases of the cubic, tetragonal and monoclinic, and monoclinic is the main phase containing up to 90%. It is shown that the maximum material strength is reached at 5–10% wollastonite, sintered at 1300°C. Estimated activation energy of sintering, which is equal to 50 kJ/mol, corresponding to the mechanism of surface diffusion.
机译：基于锆和硅灰石的复合材料具有良好的机械性能，耐热性和高硬度，并具有承受相当大的压缩应力的能力。先进的技术可以提高韧性，从而可以添加硅灰石（CaSiO3）纤维“晶须”，纤维含量的增加可以提高强度和韧性，硅灰石（CaSiO3）的体积为1–25％。烧结是用于生产具有受控密度和陶瓷细节的材料的加工过程。升高温度导致陶瓷复合材料密度的增加，这种结构兼具高机械性能，耐热性和高硬度以及承受相当大的压缩应力的能力。结果表明，在1400-1500°C的烧结温度下可获得最大的密度和硬度，因此在立方，四方和单斜晶的三相混合物中，四方氧化锆发生了转变，单斜晶是主要相。高达90％。结果表明，在1300°C烧结的硅灰石含量为5-10％时达到了最大材料强度。估计的烧结活化能等于50 kJ / mol，对应于表面扩散的机理。

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