کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1460593 | 989608 | 2015 | 6 صفحه PDF | دانلود رایگان |
Different simulated sintering atmospheres, such as conventional air, oxygen-enriched air, and oxy-fuel atmosphere were utilized to prepare ceramic specimens. The effects of sintering atmosphere and Al2O3 content on the microstructure and properties of the ceramic samples were investigated. Increasing the O2 concentration in the simulated sintering atmosphere enhanced the crystallization. An optimized microstructure, resulting in improved bending strength, Vickers hardness, and bulk density was obtained through an increased O2 concentration in the simulated sintering atmosphere. Compared to ambient air, oxygen-enriched air or oxy-fuel atmosphere showed superior sintering performances, leading to ceramics with better mechanical properties and denser microstructures. However, an increase in the Al2O3 content led to the degradation in the mechanical properties of the ceramics, mainly due to the blocking effect of AlO6 groups.
Journal: Ceramics International - Volume 41, Issue 2, Part B, March 2015, Pages 2779–2784