Optical gain evaluation on rare-earth doped Yttria-stabilized zirconia for hybrid integration on silicon photonics platforms

2019 ◽  
Author(s):  
Alicia Ruiz-Caridad ◽  
Guillaume Marcaud ◽  
Joan Manel Ramírez ◽  
Ludovic Largeau ◽  
Thomas Maroutian ◽  
...  
Keyword(s):  
Rare Earth ◽  
Silicon Photonics ◽  
Optical Gain ◽  
Yttria Stabilized Zirconia ◽  
Hybrid Integration ◽  
Stabilized Zirconia ◽  
Rare Earth Doped

scholarly journals Stability of rare‐earth‐doped spherical yttria‐stabilized zirconia synthesized by ultrasonic spray pyrolysis

2017 ◽  
Vol 100 (10) ◽  
pp. 4425-4434 ◽  
Author(s):  
Nazia Nafsin ◽  
Hui Li ◽  
Elisabeth W. Leib ◽  
Tobias Vossmeyer ◽  
Pieter Stroeve ◽  
...  
Keyword(s):  
Rare Earth ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Ultrasonic Spray ◽  
Rare Earth Doped

Rare-Earth Oxides Blended With Yttria-Stabilized Zirconia Thermal Barrier Coatings for Improved Resistance to Sand Adherence and Calcia-Magnesia-Alumino-Silicate (CMAS) Infiltration

2019 ◽  
Author(s):  
Clara Mock ◽  
Michael J. Walock ◽  
Andrew Wright ◽  
Andy Nieto ◽  
Anindya Ghoshal ◽  
...  
Keyword(s):  
Rare Earth ◽  
Thermal Barrier Coatings ◽  
Weight Percent ◽  
Rare Earth Oxides ◽  
Yttria Stabilized Zirconia ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Stabilized Zirconia ◽  
Fine Particulates ◽  
Barrier Coatings

Abstract Military rotorcraft are particularly susceptible to engine damage from environmental particulates. While inertial particle separators are efficient at removing large particles, fine particulates (75 μm or smaller) are still entering the engine. Once into the hot-section, these fine particulates melt, impinge the hot-section components, and solidify as calcia-magnesia-alumina-silicate (CMAS) glasses. Infiltration from these glassy deposits can significantly reduce component lifetimes through the loss of strain tolerance and increased thermal conductivity within the thermal barrier coatings (TBCs) protecting the underlying substrates. Engine life knockdowns can lead to significant increases in the operations and sustainment costs of military aviation assets. In addition, the adhesion and build-up of the glassy CMAS deposit on hot-section components can lead to rapid performance degradation, which has resulted in the loss of aircraft and loss of life incidents during military operations in particle-laden environments. The Army Research Laboratory (ARL) is working to develop sandphobic coatings that are resistance to molten sand adhesion and the buildup of glassy CMAS deposits. To this end, this paper/presentation will focus on recent results from blending rare-earth oxides (REO) with yttria-stabilized zirconia thermal barrier coatings. Gadolinia powder was mixed with eight (8) weight percent yttria-stabilized zirconia (8YSZ) powder for consolidation via air plasma spray onto Inconel 718 discs (1-in diameter) and tested in the Hot Particulate Ingestion Rig (HPIR) under engine-relevant conditions, using AFRL-02 synthetic sand. The as-processed and tested samples were characterized using optical microscopy (OM) and scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS). Preliminary results show that mixing REOs with 8YSZ can significantly reduce molten sand adhesion compared to pure 8YSZ.

Spectral control of optical gain in a rare earth-doped optical fiber using novel triple layered structures

2006 ◽  
Vol 12 (4) ◽  
pp. 297-304 ◽  
Author(s):  
Kyungwhan Oh ◽  
Seongwoo Yoo ◽  
Uh-Chan Ryu ◽  
Seungtaek Kim ◽  
Un-Chul Paek ◽  
...  
Keyword(s):  
Rare Earth ◽  
Optical Fiber ◽  
Optical Gain ◽  
Layered Structures ◽  
Spectral Control ◽  
Rare Earth Doped

Orientation Control of Perovskite Epitaxial Thin Film on Silicon Substrate with Yttria-Stabilized Zirconia Buffer Layers

2006 ◽  
Vol 320 ◽  
pp. 69-72 ◽  
Author(s):  
Masao Kondo ◽  
Kazuaki Kurihara
Keyword(s):  
Thin Film ◽  
Rare Earth ◽  
Buffer Layer ◽  
Layer Structure ◽  
Rare Earth Oxide ◽  
Calcium Titanate ◽  
Rare Earth Oxides ◽  
Yttria Stabilized Zirconia ◽  
Buffer Layers ◽  
Stabilized Zirconia

The influence of a rare earth oxide/yttria-stabilized zirconia (YSZ) double buffer layer structure on the orientation of a perovskite thin film was investigated on (100) silicon substrates. A calcium titanate perovskite film with a mixture of (110) and (100) orientation was grown epitaxially on a YSZ buffer layer. Since rare earth oxides have almost the same chemical nature and different lattice parameters, it is anticipated that the lattice parameter of the buffer layer can be controlled by changing the rare earth element. An (100) oriented epitaxial calcium titanate film was obtained by changing the composition of rare earth oxides on the YSZ/Si substrate.

Chemical compatibility of rare earth apatite with yttria-stabilized zirconia

2021 ◽  
Vol 41 (3) ◽  
pp. 1995-2001
Author(s):  
Han Zhang ◽  
Jie Lu ◽  
Lirong Luo ◽  
Xiaofeng Zhao ◽  
Fangwei Guo ◽  
...  
Keyword(s):  
Rare Earth ◽  
Yttria Stabilized Zirconia ◽  
Chemical Compatibility ◽  
Stabilized Zirconia

Microstructural examination of modified yttria stabilized zirconia by EM analytical techniques

1986 ◽  
Vol 44 ◽  
pp. 842-843
Author(s):  
W. W. Davison ◽  
R. C. Buchanan
Keyword(s):  
Mechanical Properties ◽  
Analytical Techniques ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Transmission Microscopy ◽  
Sintering Aid ◽  
Densification Temperature ◽  
Chemical Inertness ◽  
Scanning Transmission ◽  
Microstructural Examination

Yttria stabilized zirconia (YSZ) has become a significant technological material due to its high ionic conductivity, chemical inertness, and good mechanical properties. Temperatures on the order of 1700°C are required, however, to densify YSZ to the degree necessary for good electrical and mechanical properties. A technique for lowering the densification temperature is the addition of small amounts of material which facilitate the formation of a liquid phase at comparatively low temperatures. In this study, sintered microstructures obtained from the use of Al2O3 as a sintering aid were examined with scanning, transmission, and scanning transmission microscopy (SEM, TEM, and STEM).

Waveguide amplifiers in rare-earth doped glasses : fabrication, characterisation [MATH] modelling

1994 ◽  
Vol 04 (C4) ◽  
pp. C4-277-C4-280 ◽  
Author(s):  
B. HYDE ◽  
D. BARBIER ◽  
J. HUBNER ◽  
J.-M. JOUANNO ◽  
A. KEVORKIAN ◽  
...  
Keyword(s):  
Rare Earth ◽  
Waveguide Amplifiers ◽  
Doped Glasses ◽  
Rare Earth Doped
Sign in / Sign up

Export Citation Format

Share Document