Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Tsuneaki Matsudaira"'
Autor:
Takafumi Ogawa, Bin Miao, Jiake Wei, Bin Feng, Naoya Shibata, Tsuneaki Matsudaira, Satoshi Kitaoka
First-principles calculations, along with a core-hole technique, are adopted to simulate oxygen K-edge spectra for three polymorphs of Yb2O3 and two types of ytterbium silicates (i.e., Yb2SiO5 and Yb2Si2O7). The twe Yb silicates are compared with exp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5767ce73c146ea1956143c680004c6d4
https://doi.org/10.26434/chemrxiv-2022-lvt66
https://doi.org/10.26434/chemrxiv-2022-lvt66
Autor:
Tsuneaki Matsudaira, Takafumi Ogawa, Miyuki Takeuchi, Naoya Shibata, Yuichi Ikuhara, Satoshi Kitaoka
Publikováno v:
Acta Materialia. 252:118927
Autor:
Tsuneaki Matsudaira, Daisaku Yokoe, Masashi Wada, Satoshi Kitaoka, Naoki Kawashima, Miyuki Takeuchi, Masasuke Takata, Takeharu Kato
Publikováno v:
Journal of the European Ceramic Society. 41:3150-3160
Mass transfer in polycrystalline Yb2SiO5 wafers with precise composition control was evaluated and analyzed by oxygen permeation experiments at high temperatures using an oxygen tracer. Oxygen permeation proceeded due to mutual grain boundary diffusi
Autor:
Naoki Kawashima, Ushio Matsumoto, Makoto Tanaka, Takafumi Ogawa, Satoshi Kitaoka, Emi Kawai, Miyuki Takeuchi, Tsuneaki Matsudaira
Publikováno v:
Journal of the Ceramic Society of Japan. 129:22-31
Autor:
Daisaku Yokoe, Satoshi Kitaoka, Miyuki Takeuchi, Naoki Kawashima, Tsuneaki Matsudaira, Masasuke Takata, Masashi Wada, Takafumi Ogawa, Takeharu Kato
Publikováno v:
Acta Materialia. 201:373-385
The effect of water vapor on mass transfer in polycrystalline Yb2Si2O7 (YbDS) wafers under oxygen potential gradients (dµO) at high temperatures was investigated using an oxygen permeation technique. The oxygen permeation under dry dµO (high oxygen
Autor:
Naoki Kawashima, Masasuke Takata, Satoshi Kitaoka, Masashi Wada, Tsuneaki Matsudaira, Daisaku Yokoe
Publikováno v:
Materials Today: Proceedings. 16:59-64
The optimum structure for multi-layered environmental barrier coatings (EBC) with enhanced environmental shielding and structural stability was proposed based on the mass-transfer mechanisms of the EBC constituent oxides such as polycrystalline Yb2Si
Autor:
Naoki Kawashima, Masasuke Takata, Daisaku Yokoe, Tsuneaki Matsudaira, Satoshi Kitaoka, Masashi Wada
Publikováno v:
Materials Science Forum. 941:1898-1903
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 expos
Autor:
Craig A. J. Fisher, Daisaku Yokoe, Naoki Kawashima, Takafumi Ogawa, Emi Kawai, Satoshi Kitaoka, Takeharu Kato, Tsuneaki Matsudaira
Publikováno v:
SSRN Electronic Journal.
Controlling the complex nanostructures that often form in cation-deficient oxides may provide an effective way to tailor their thermophysical properties, but this remains a challenging task. We report a study of un-doped and Hf-doped YTa3O9 with a Y-
Autor:
Satoshi Kitaoka, Yuichi Ikuhara, Miyuki Takeuchi, Naoya Shibata, Tsuneaki Matsudaira, Takafumi Ogawa
Publikováno v:
Acta Materialia. 151:21-30
The mass transfer mechanisms in polycrystalline alumina wafers serving as models for anti-oxidation films were investigated by evaluating oxygen permeability at 1873 K using 18O2 as a tracer. The grain boundary (GB) diffusion coefficients for oxygen
Autor:
Naoki Kawashima, Tsuneaki Matsudaira, Daisaku Yokoe, Craig A. J. Fisher, Takeharu Kato, Satoshi Kitaoka, Habu Yoichiro, Takafumi Ogawa, Emi Kawai
Publikováno v:
Acta Materialia. 216:117152
The identification of low thermal-conductivity materials that are stable up to high temperatures has been a longstanding challenge for high-temperature thermal management systems such as thermal barrier coatings (TBCs). Although phonon scattering in