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Shape, size and distribution of metal particles embedded in a ceramic matrix

机译:嵌入陶瓷基质中的金属颗粒的形状,大小和分布

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The presented paper is a review of own work done on two systems of composites, Al_2O_3-Ni and Al_2O_3-Fe. The previous own results of research into shape, size and distribution of the metal particles and spinel phase embedded in a ceramic matrix are referred to and new ones are presented. Metal particles as well as spinel can be distributed uniformly in a ceramic matrix or can form graded structures. Most often there are agglomerates of metal or spinel particles rather than separated particles embedded in ceramic grains. In composites the growing spinel forms a thick oval layer around a metal particle, however, separate spinel areas embedded in a ceramic matrix are noticed, too. Also, the characteristic "doughnut" shape of spinel is found. Since the metal and spinel phase influence the mechanical properties, the required properties of ceramic-metal composites can be tailored by changing the size, shape and distribution of the phases.
机译:提出的论文是对自己在两个复合体系Al_2O_3-Ni和Al_2O_3-Fe上完成的工作的回顾。引用了以前关于嵌入陶瓷基体中的金属颗粒和尖晶石相的形状,大小和分布的研究结果,并提出了新的研究结果。金属颗粒以及尖晶石可以均匀分布在陶瓷基体中,或者可以形成渐变结构。最常见的是金属或尖晶石颗粒的团聚体,而不是嵌入陶瓷颗粒中的分离颗粒。在复合材料中,生长中的尖晶石在金属颗粒周围形成厚的椭圆形层,但是,也注意到嵌入陶瓷基体中的单独的尖晶石区域。而且,发现了尖晶石的特征“甜甜圈”形状。由于金属和尖晶石相会影响机械性能,因此可以通过更改相的大小,形状和分布来调整陶瓷-金属复合材料的所需性能。

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