Contribution of the hybrid component to the structure and properties of ceramics based on metastable phases Al2O3

2021 ◽  
pp. 127-136
Author(s):  
A. V. Maletsky ◽  
T. E. Konstantinova ◽  
D. R. Belichko ◽  
G. K. Volkova ◽  
V. V. Burkhovetsky
Keyword(s):  
Mechanical Properties ◽  
Yttrium Aluminum Garnet ◽  
Metastable Phase ◽  
Physical And Mechanical Properties ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
Mutual Inhibition ◽  
X Ray ◽  
Tetragonal Lattice ◽  
Yttrium Aluminum

The paper presents results of the study of the effect of doping with yttrium oxide on ceramics of the composition (γ + θ) Al2O3 + nY2O3 (n = 0, 1, 2, 3 wt%), sintered at 1550°C for 2 h, from powders of the specified composition annealed at temperatures of 500 , 800, 1000°С. X-ray diffraction analysis established the formation in ceramics of yttrium aluminum garnet Y3Al5O12 (YAG) and a metastable phase of the same composition with a tetragonal lattice type in powders at temperatures above 1200°C. The effect of YAG on the physical and mechanical properties was established: high properties were demonstrated by ceramics of the composition α-Al2O3 + 2wt% Y2O3, obtained from a powder annealed at 1000°C. In addition, high physical and mechanical properties were observed in ceramics of the composition α-Al2O3 + 0wt% Y2O3, obtained from a powder annealed at 800°C. The effect of the so-called “mutual protection against crystallization” was discovered, which consists in the mutual inhibition of crystallization processes in powders of the Al2O3 – Y2O3 system.

Preparation and Properties of YAG Powder and Porous Ceramics

2014 ◽  
Vol 1058 ◽  
pp. 217-220
Author(s):  
Wen Bo Zhao ◽  
Xin Liang ◽  
Fa Mei Hu ◽  
Liang Liang You ◽  
Bo Feng Ma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Reaction Time ◽  
Chemical Composition ◽  
Yttrium Aluminum Garnet ◽  
Sintering Temperature ◽  
Porous Ceramics ◽  
Diffraction Peak ◽  
Preparation Conditions ◽  
Yttrium Aluminum ◽  
Properties Of Materials

Yttrium aluminum garnet (YAG) with a chemical composition of Y3Al5O12 is an important advanced structural and functional material.The preparation conditions were a pH of 9, a titration rate of 10ml/minute and a reaction time of 60 minutes. The analysis shows that the YAG precursor does not have an obvious characteristic crystalline diffraction peak, the characteristic diffraction peak of YAG was found after the calcination of the YAG precursor at 1100¡æ for 1 hour, the characteristic diffraction peak of YAG is strong, which indicates that the YAG crystalline phase is integrated and pure. The pore microstructure of porous YAG ceramics marked differed with an increase in the sintering temperature, the compressure strength of porous YAG ceramics is increased with an increase in the sintering temperature, the compressure strength shows the opposite rule with the prosity, which indicaties the mechanical properties of materials are effacted with the densification effect of materials.

Static and dynamic mechanical properties of Yttrium Aluminum Garnet (YAG)

2019 ◽  
Vol 45 (9) ◽  
pp. 12256-12263 ◽  
Author(s):  
Wen Jiang ◽  
Xingwang Cheng ◽  
Zhiping Xiong ◽  
Zhaolong Ma ◽  
Tayyeb Ali ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Yttrium Aluminum Garnet ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical ◽  
Yttrium Aluminum

scholarly journals Mechanical properties of fully dense yttrium aluminum garnet (YAG) ceramics

2008 ◽  
Vol 116 (1353) ◽  
pp. 649-652 ◽  
Author(s):  
Hoshiteru NOZAWA ◽  
Takagimi YANAGITANI ◽  
Toshiyuki NISHIMURA ◽  
Hidehiko TANAKA
Keyword(s):  
Mechanical Properties ◽  
Yttrium Aluminum Garnet ◽  
Yttrium Aluminum

Mechanical Properties of Melt-Grown Alumina-Yttrium Aluminum Garnet Eutectics up to 1900 K

2005 ◽  
Vol 88 (6) ◽  
pp. 1488-1495 ◽  
Author(s):  
Jose Y. Pastor ◽  
Javier LLorca ◽  
Alicia Salazar ◽  
Patricia B. Oliete ◽  
Isabel de Francisco ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Yttrium Aluminum Garnet ◽  
Yttrium Aluminum

Yag Single Crystals for Scintillators of Stem

1990 ◽  
Vol 48 (1) ◽  
pp. 166-167
Author(s):  
M. Hibino ◽  
K. Irie ◽  
R. Autrata ◽  
P. schauer
Keyword(s):  
Single Crystals ◽  
Yttrium Aluminum Garnet ◽  
Light Guide ◽  
Detection System ◽  
Polished Surface ◽  
Detective Quantum Efficiency ◽  
Backscattered Electrons ◽  
Electron Detection ◽  
Yttrium Aluminum ◽  
Phosphor Screens

Although powdered phosphor screens are usually used for scintillators of STEM, it has been found that the phosphor screen of appropriate thickness should be used depending on the accelerating voltage, in order to keep high detective quantum efficiency. 1 It has been also found that the variation in sensitivity, due to granularity of phosphor screens, makes the measurement of fine electron probe difficult and that the sensitivity reduces with electron irradiation specially at high voltages.In order to find out a preferable scintillator for STEM, single crystals of YAG (yttrium aluminum garnet), which are used for detecting secondary and backscattered electrons in SEM were investigated and compared with powdered phosphor screens, at the accelerating voltages of 100kV and 1 MV. A conventional electron detection system, consisting of scintillator, light guide and PMT (Hamamatsu Photonics R268) was used for measurements. Scintillators used are YAG single crystals of 1.0 to 3.2mm thicknesses (with surfaces matted for good interface to the light guide) and of 0.8mm thickness (with polished surface), and powdered P-46 phosphor screens of 0.07mm and 1.0mm thicknesses for 100kV and 1MV, respectively. Surfaces on electron-incidence side of all scintillators are coated with reflecting layers.

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