The Effect of the Addition of Y<sub>2</sub>O<sub>3</sub> on the Microstructure of Polycrystalline Alumina Ceramics

In the scope of this study, a powder mixture was prepared that contained 3 Al<sub>2</sub>O<sub>3</sub>-Y<sub>2</sub>O<sub>3</sub> consisting of 99.99% pure Al<sub>2</sub>O<sub>3</sub> and aluminum oxide of 65–67% and 70% by weig...

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Bibliographic Details
Main Authors: Serkan Abalı, Cem Uğur Karaçam
Format: Article
Language:English
Published: MDPI AG 2018-11-01
Series:Proceedings
Subjects:
Online Access:https://www.mdpi.com/2504-3900/2/23/1407
Description
Summary:In the scope of this study, a powder mixture was prepared that contained 3 Al<sub>2</sub>O<sub>3</sub>-Y<sub>2</sub>O<sub>3</sub> consisting of 99.99% pure Al<sub>2</sub>O<sub>3</sub> and aluminum oxide of 65–67% and 70% by weight of 99.999% pure Y<sub>2</sub>O<sub>3</sub> 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 Y<sub>2</sub>O<sub>3</sub> additive and phase composition, microstructure, and mechanic properties were examined.
ISSN:2504-3900