The Effect of the Addition of Y2O3 on the Microstructure of Polycrystalline Alumina Ceramics

Proceedings

Karaçam, Cem Uğur¹  Abalı, Serkan² 

[1] Department of Bioengineering and Materials Engineering, Çanakkale Onsekiz Mart University, 17100 Çanakkale, Turkey;Department of Materials Science and Engineering, Çanakkale Onsekiz Mart University, 17100 Çanakkale, Turkey

关键词: alumina;    yttrium aluminum garnet;    composites;    energy efficiency;    sintering;    mechanical properties;    microstructure;   

DOI  :  10.3390/proceedings2231407

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

In the scope of this study, a powder mixture was prepared that contained 3 Al2O3-Y2O3 consisting of 99.99% pure Al2O3 and aluminum oxide of 65–67% and 70% by weight of 99.999% pure Y2O3 powders. After the powders were weighed on a precision scale, the milling process was carried out in a vibratory disc mill. For the granulation, 3 powder mixtures that were subject to sintering were sieved to a size of less than 106 µm in a powder sieve shaker. The powders were shaped with a cold isostatic press after this step and the 3 acquired samples were sintered for 12 h under a temperature of 1923 K. Selected physical and mechanical behaviors were taken by evaluating microhardness measurements, bending strength XRD analysis and electron microscope images of the 3 sintered samples. The changes in the Y2O3 additive and phase composition, microstructure, and mechanic properties were examined.

【 授权许可】

CC BY