In this paper, three approaches were investigated for preparing alumina‐mullite‐zirconia (AMZ) composites. The weight ratio of alumina to zircon was selected to be 85/15. In the first approach, common well‐known reaction sintering or solid‐state mixing of alumina and zircon were used. In the second approach, suspensions of the raw materials were prepared to examine the effect of wet processing method. The third approach was based on the use of aluminum alkoxide coated zircon and alumina. The sintering of samples was carried out at the temperature of 1630°C for 3 hours. Phase composition and Rietveld refinement method, microstructural observation, EDS analysis, as well as physical and mechanical properties were used and determined to characterize the sintered samples. The results showed that aluminum alkoxide coating can develop the mentioned reaction sintering and mullite formation. However, the desired mechanical properties were not obtained. Wet processing approach resulted in more interesting data about the formation of mullite and could improve the microstructure homogeneity of final composites. Higher amount of tetragonal zirconia, good densification, high hardness, and fine microstructure were obtained by the wet approach. These interesting results were attributed to the fine discrete particles provided by mutual attraction in the wet preparation method.

中文翻译：

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在湿法加工中通过颗粒相互吸引开发AMZ复合材料

本文研究了三种制备氧化铝-莫来石-氧化锆（AMZ）复合材料的方法。氧化铝与锆石的重量比选择为85/15。在第一种方法中，使用了常见的氧化铝和锆石的反应烧结或固态混合。在第二种方法中，准备了原材料的悬浮液以检验湿法处理方法的效果。第三种方法是基于铝醇盐涂层的锆石和氧化铝的使用。样品的烧结在1630℃的温度下进行3小时。使用相组成和Rietveld细化方法，微观结构观察，EDS分析以及物理和机械性能来确定烧结样品的特征。结果表明，烷氧基铝涂层可以促进上述反应烧结和莫来石的形成。但是，没有获得所需的机械性能。湿加工方法产生了关于莫来石形成的更有趣的数据，并可以改善最终复合材料的微观结构均匀性。通过湿法获得了更高含量的四方氧化锆，良好的致密性，高硬度和良好的微观结构。这些有趣的结果归因于湿法制备方法中相互吸引而产生的细小离散颗粒。湿加工方法产生了关于莫来石形成的更有趣的数据，并可以改善最终复合材料的微观结构均匀性。通过湿法获得了更高含量的四方氧化锆，良好的致密性，高硬度和良好的微观结构。这些有趣的结果归因于湿法制备方法中相互吸引而产生的细小离散颗粒。湿加工方法产生了关于莫来石形成的更有趣的数据，并可以改善最终复合材料的微观结构均匀性。通过湿法获得了更高含量的四方氧化锆，良好的致密性，高硬度和良好的微观结构。这些有趣的结果归因于湿法制备方法中相互吸引而产生的细小离散颗粒。