Mass transfer in polycrystalline ytterbium disilicate under oxygen potential gradients at high temperatures

2017 ◽  
Vol 135 ◽  
pp. 372-381 ◽  
Author(s):  
Masashi Wada ◽  
Tsuneaki Matsudaira ◽  
Naoki Kawashima ◽  
Satoshi Kitaoka ◽  
Masasuke Takata
Keyword(s):  
Mass Transfer ◽  
High Temperatures ◽  
Oxygen Potential ◽  
Potential Gradients

Mass transfer in polycrystalline ytterbium monosilicate under oxygen potential gradients at high temperatures

2020 ◽  
Author(s):  
Tsuneaki Matsudaira ◽  
Masashi Wada ◽  
Naoki Kawashima ◽  
Miyuki Takeuchi ◽  
Daisaku Yokoe ◽  
...  
Keyword(s):  
Mass Transfer ◽  
High Temperatures ◽  
Oxygen Potential ◽  
Potential Gradients

scholarly journals Mass Transfer in Polycrystalline Alumina under Oxygen Potential Gradients at High Temperatures

Materia Japan ◽  
2009 ◽  
Vol 48 (6) ◽  
pp. 317-320 ◽  
Author(s):  
Satoshi Kitaoka ◽  
Tsuneaki Matsudaira ◽  
Masashi Wada
Keyword(s):  
Mass Transfer ◽  
High Temperatures ◽  
Oxygen Potential ◽  
Polycrystalline Alumina ◽  
Potential Gradients

Effect of Water Vapor on Mass Transfer in Polycrystalline Yb2Si2O7 under Oxygen Potential Gradients at High Temperatures

2020 ◽  
Vol 201 ◽  
pp. 373-385
Author(s):  
Masashi Wada ◽  
Tsuneaki Matsudaira ◽  
Naoki Kawashima ◽  
Miyuki Takeuchi ◽  
Daisaku Yokoe ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Water Vapor ◽  
High Temperatures ◽  
Oxygen Potential ◽  
Effect Of Water ◽  
Potential Gradients

scholarly journals Effect of chemical composition on mass transfer in Y2Ti2O7 under oxygen potential gradient at high temperatures

2021 ◽  
Vol 129 (1) ◽  
pp. 22-31
Author(s):  
Makoto TANAKA ◽  
Tsuneaki MATSUDAIRA ◽  
Emi KAWAI ◽  
Naoki KAWASHIMA ◽  
Ushio MATSUMOTO ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Chemical Composition ◽  
High Temperatures ◽  
Oxygen Potential ◽  
Potential Gradient

Mass transfer through a single grain boundary in alumina bicrystals under oxygen potential gradients

2010 ◽  
Vol 46 (12) ◽  
pp. 4407-4412 ◽  
Author(s):  
Tsuneaki Matsudaira ◽  
Satoshi Kitaoka ◽  
Naoya Shibata ◽  
Tsubasa Nakagawa ◽  
Yuichi Ikuhara
Keyword(s):  
Mass Transfer ◽  
Grain Boundary ◽  
Oxygen Potential ◽  
Potential Gradients ◽  
Single Grain

Mass Transfer in Yb Silicate Environmental Barrier Coatings at High Temperatures

2018 ◽  
Vol 941 ◽  
pp. 1898-1903
Author(s):  
Satoshi Kitaoka ◽  
Tsuneaki Matsudaira ◽  
Masashi Wada ◽  
Naoki Kawashima ◽  
Daisaku Yokoe ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Oxygen Potential ◽  
Silicate Layer ◽  
Design Guideline ◽  
Barrier Coatings ◽  
Environmental Barrier Coatings ◽  
Environmental Barrier ◽  
Partial Pressures ◽  
Potential Gradients ◽  
Ytterbium Silicate

The oxygen permeabilities of polycrystalline Yb2Si2O7 wafers cut from sintered bodies to serve as models of environmental barrier coatings were determined at temperatures up to 1673 K under various oxygen potential gradients (dµO), produced by exposing the upper and lower surfaces of the wafer to atmospheres with different oxygen partial pressures (PO2). Oxygen permeation proceeded via grain boundary (GB) diffusion of oxygen from the higher PO2 surface to the lower PO2 surface, concurrently with GB diffusion of ytterbium in the opposite direction. Mass transfer analysis allowed for a design guideline for selectively enhancing the structural stability of the ytterbium silicate layer with applying a dµO.

Sign in / Sign up

Export Citation Format

Share Document