Grain growth and sinterability in Er2O3-doped cubic zirconia (c-ZrO2)

2014 ◽  
Vol 105 (2) ◽  
pp. 208-214 ◽  
Author(s):  
Bulent Aktas ◽  
Suleyman Tekeli ◽  
Mustafa Kucuktuvek
Keyword(s):  
Grain Growth ◽  
Cubic Zirconia

Grain growth and phase stability of nanocrystalline cubic zirconia under ion irradiation

2010 ◽  
Vol 82 (18) ◽  
Author(s):  
Yanwen Zhang ◽  
Weilin Jiang ◽  
Chongmin Wang ◽  
Fereydoon Namavar ◽  
Philip D. Edmondson ◽  
...  
Keyword(s):  
Grain Growth ◽  
Phase Stability ◽  
Ion Irradiation ◽  
Cubic Zirconia

scholarly journals Relation between mechanical and textural properties of dense materials of tetragonal and cubic zirconia

2016 ◽  
Vol 48 (1) ◽  
pp. 119-130 ◽  
Author(s):  
Sofía Gómez ◽  
Gustavo Suárez ◽  
Nicolás Rendtorff ◽  
Esteban Aglietti
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
Vickers Hardness ◽  
Sintering Temperature ◽  
Textural Properties ◽  
Theoretical Models ◽  
Indentation Method ◽  
Cubic Zirconia ◽  
Different Content ◽  
Scanning Electron

In the current paper we present a study of the sinterability of two zirconia (ZrO2) nanopowders with different content of yttrium oxide (Y2O3) 3 and 8 % tetragonal and cubic zirconia, respectively. After sintering between 900-1500?C, the samples were characterized in terms of their density and porosity using Archimedes technique. Their grain size was evaluated using scanning electron microscope (SEM). Vickers hardness and fracture toughness (KIC) were measured by the indentation method. The results showed that pores are almost eliminated at sintering temperatures higher than 1400?C and grain size is larger due to the agglomerates formed as a result of grain growth. Vickers hardness evaluated at 1400?C sintering temperature is greater than that obtained at 1500?C due to the grain growth produced at this temperature. In addition, we show a correlation between Vickers hardness and the porosity, obtained by evaluating empirical and theoretical models.

Grain Refinement in Titanium-Erbium Alloys

1974 ◽  
Vol 32 ◽  
pp. 522-523
Author(s):  
B. B. Rath ◽  
J. E. O'Neal ◽  
R. J. Lederich
Keyword(s):  
Electron Microscopy ◽  
Size Distribution ◽  
Grain Refinement ◽  
Grain Growth ◽  
Volume Fraction ◽  
Pure Titanium ◽  
Systematic Investigation ◽  
Second Phase ◽  
Titanium Matrix ◽  
Average Size

Addition of small amounts of erbium has a profound effect on recrystallization and grain growth in titanium. Erbium, because of its negligible solubility in titanium, precipitates in the titanium matrix as a finely dispersed second phase. The presence of this phase, depending on its average size, distribution, and volume fraction in titanium, strongly inhibits the migration of grain boundaries during recrystallization and grain growth, and thus produces ultimate grains of sub-micrometer dimensions. A systematic investigation has been conducted to study the isothermal grain growth in electrolytically pure titanium and titanium-erbium alloys (Er concentration ranging from 0-0.3 at.%) over the temperature range of 450 to 850°C by electron microscopy.

Microstructural characterization of a rapidly solidified Al-Fe-V-Si alloy for elevated temperature applications

1988 ◽  
Vol 46 ◽  
pp. 550-551
Author(s):  
R. E. Franck ◽  
J. A. Hawk ◽  
G. J. Shiflet
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Grain Growth ◽  
Volume Fraction ◽  
Microstructural Characterization ◽  
Second Phase ◽  
Microstructural Stability ◽  
Elevated Temperature Strength ◽  
Temperature Applications

Rapid solidification processing (RSP) is one method of producing high strength aluminum alloys for elevated temperature applications. Allied-Signal, Inc. has produced an Al-12.4 Fe-1.2 V-2.3 Si (composition in wt pct) alloy which possesses good microstructural stability up to 425°C. This alloy contains a high volume fraction (37 v/o) of fine nearly spherical, α-Al12(Fe, V)3Si dispersoids. The improved elevated temperature strength and stability of this alloy is due to the slower dispersoid coarsening rate of the silicide particles. Additionally, the high v/o of second phase particles should inhibit recrystallization and grain growth, and thus reduce any loss in strength due to long term, high temperature annealing.The focus of this research is to investigate microstructural changes induced by long term, high temperature static annealing heat-treatments. Annealing treatments for up to 1000 hours were carried out on this alloy at 500°C, 550°C and 600°C. Particle coarsening and/or recrystallization and grain growth would be accelerated in these temperature regimes.

‘Versatility of Genius’ Cubic Zirconia

2020 ◽  
Vol 37 (3) ◽  
pp. 260-261
Author(s):  
Victor Tuzlukov
Keyword(s):  
Cubic Zirconia
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