Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Zhang, Y.*; Marusawa, Kenji*; Kudo, Kohei*; Morooka, Satoshi; Gong, W.; Harjo, S.; Miyamoto, Goro*; Furuhara, Tadashi*
Journal of Materials Science & Technology, 275, p.250 - 259, 2026/12
Times Cited Count：0 Percentile：0.00(Materials Science, Multidisciplinary)
Ti
O
having spin-
antiferromagnetic alternating chains of Cr spins and dimers of Nd momentsHase, Masashi*; Ikeda, Manami*; Hagihara, Masato; Kubota, Masato
Journal of Magnetism and Magnetic Materials, 653, p.174193_1 - 174193_7, 2026/09
Times Cited Count：0 Percentile：0.00(Materials Science, Multidisciplinary)
under high temperatures and various water vapor concentrationsMohamad, A. B.; Nakajima, Kunihisa; Imoto, Jumpei*; Takano, Masahide
Journal of Nuclear Materials, 631, p.156826_1 - 156826_12, 2026/09
Times Cited Count：0 alteration phases under chemically complex conditionsMei, H.*; Aoyagi, Noboru; Takaki, Seiya; Saito, Takumi*
Journal of Hazardous Materials, 514, p.142804_1 - 142804_11, 2026/08
Yoshida, Naoki; Amano, Yuki; Yoshida, Ryoichiro; Ono, Takuya; Tashiro, Shinsuke; Yamane, Yuichi
Journal of Hazardous Materials, 513, p.142332_1 - 142332_20, 2026/07
Times Cited Count：0Volatile ruthenium tetroxide (RuO
) formed during evaporation-to-dryness accidents (EDA) of high-level liquid waste (HLLW) combines high chemical toxicity with radiotoxicity from isotopes such as 
Ru and 
Ru, making it a primary hazard in nuclear-fuel reprocessing. This study experimentally elucidates the mechanisms governing RuO formation while testing the validity of the pragmatic nitrosyl-ruthenium ([RuNO]) surrogate model, an experimental model that assumes Ru in HLLW exists as [RuNO], and evaluates gaseous Ru release using nitric acid solutions of [RuNO], commonly used in RuO release assessments by comparing it with the behavior of simulated HLLW (s-HLLW). We systematically investigated potential pathways, including oxidation by liquid-phase nitric acid (HNO
(l)), gas-phase nitric acid (HNO(g)), and oxygen (O2); thermal decomposition of [RuNO]; and matrix effects of coexisting nitrates. The results identify oxidation by activated HNO(l), oxidation by HNO(g) and thermal decomposition of [RuNO] as the principal routes to RuO, with HNO(g) playing a far more significant role than previously recognized. Crucially, the RuO release profile from s-HLLW differed markedly from that predicted by the [RuNO] surrogate model, demonstrating that this model fails to capture the complex matrix effects and time-dependent chemical changes of Ru species inherent to real HLLW. These findings have significant implications for improving the accuracy of hazard assessments related to RuO release during HLLW EDAs, particularly by highlighting the limitations of commonly used [RuNO] surrogate models.
Kurebayashi, Hidekazu*; Yamamoto, Kei; Seki, Takeshi*; 9 of others*
Nature Materials, 25(7), p.1167 - 1174, 2026/07
Times Cited Count：0 Percentile：0.00(Chemistry, Physical)Miyazaki, Kanako*; Fueda, Kazuki*; Kadowaki, Masanao; Terada, Hiroaki; Kozai, Naofumi; Iwata, Hajime; Horie, Kenji*; Takehara, Mami*; Yamasaki, Shinya*; Grambow, B.*; et al.
Journal of Hazardous Materials, 511, p.142180_1 - 142180_17, 2026/06
Times Cited Count：0 Percentile：0.00(Engineering, Environmental)
neutron diffraction experimentsTsuchida, Noriyuki*; Fujita, Akinori*; Hirakawa, Naoki*; Hamada, Junichi*; Ishimaru, Eiichiro*; Gong, W.; Kawasaki, Takuro; Harjo, S.
Materials Characterization, 236, p.116436_1 - 116436_13, 2026/06
Zhou, D.*; Zhang, X.*; Pang, X.*; Zhao, Z.*; Chen, X.*; Wei, S.*; Yang, C.*; Gong, W.; Harjo, S.; Li, R.*; et al.
Materials Research Letters (Internet), 14(6), p.689 - 698, 2026/06
SrMnO with weak magnetoresistanceSterling, T. C.*; Savici, A. T.*; Kajimoto, Ryoichi; Ikeuchi, Kazuhiko*; Khan, N.*; Weber, F.*; Reznik, D.*
Communications Materials (Internet), 7, p.121_1 - 121_11, 2026/05
As studied by X-ray magnetic circular dichroismWan, Y.*; Shibata, Goro; Takeda, Yukiharu*; Okane, Tetsuo; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi*; 10 of others*
Physical Review Materials (Internet), 10(5), p.054402_1 - 054402_8, 2026/05
Times Cited Count：1 Percentile：0.00(Materials Science, Multidisciplinary)Jiang, L.*; Wang, H. H.*; Su, Y. H.; Xu, P. G.; Shinohara, Takenao; Xia, B.*; Wang, Y. W.*
Journal of Materials Science, 61(14), p.9754 - 9775, 2026/04
Times Cited Count：0 Percentile：0.00(Materials Science, Multidisciplinary)Mohamad, A. B.; Chen, J.*; Ioka, Ikuo*; Suzuki, Eriko; Kondo, Keietsu; Abe, Yosuke; Yamashita, Shinichiro; Okubo, Nariaki; Nemoto, Yoshiyuki; Okada, Yuji*; et al.
Journal of Nuclear Materials, 625, p.156513_1 - 156513_9, 2026/04
Times Cited Count：0 Percentile：0.00(Materials Science, Multidisciplinary)O solutionKumagai, Yuta; Kusaka, Ryoji; Takano, Masahide; Watanabe, Masayuki
Journal of Nuclear Materials, 625, p.156553_1 - 156553_7, 2026/04
Times Cited Count：0 Percentile：0.00(Materials Science, Multidisciplinary)Uranium-zirconium oxide solid solution, (U, Zr)O, is a representative matrix phase found in fuel debris formed during severe nuclear reactor accidents. Understanding its chemical behavior in oxidative aqueous environments is important for evaluating the potential release of radionuclides during water contact. In this study, we investigated the reactivity of (U, Zr)O with hydrogen peroxide (HO) in pure water to assess its resistance to oxidative dissolution, because HO is the dominant oxidant produced by water radiolysis. The dissolution behavior of uranium and zirconium was monitored through repeated HO exposure experiments, and the solid phases were characterized using Raman micro-spectroscopy and X-ray diffraction. Kinetic modeling was performed to interpret experimental data. The results showed that uranium dissolution occurred initially but decreased significantly upon repeated HO exposure, while zirconium dissolution proceeded more slowly. Raman analysis revealed only minor surface changes, with limited formation of uranyl peroxide phases. The kinetic simulation reproduced the experimental trends by assuming a small fraction of redox-active surface sites. These findings suggest that the observed durability of (U, Zr)O against HO-induced oxidative dissolution is not due to the formation of a protective surface layer, but rather reflects the limited redox reactivity of most of the surface. This study provides a quantitative basis for understanding the HO-induced oxidation of (U, Zr)O in water, relevant to the long-term behavior of fuel debris.
Xia, B.*; Wang, H. H.*; Su, Y. H.; Xu, P. G.; Shinohara, Takenao; Wang, Y. W.*
Materials Science & Engineering A, 957, p.149940_1 - 149940_7, 2026/04
Times Cited Count：0 Percentile：0.00(Nanoscience & Nanotechnology)Ebihara, Kenichi; Yamaguchi, Masatake; Itakura, Mitsuhiro
Metallurgical and Materials Transactions A, 57(4), p.1480 - 1489, 2026/04
Times Cited Count：0 Percentile：0.00(Materials Science, Multidisciplinary)Hydrogen (H) embrittlement is an important issue for steel. The experimental thermal desorption spectra of H from an iron sample containing H-enhanced strain-induced vacancies (Vs) were successfully reproduced by revising a previous numerical model. In the revised model, we adopted concentration variables for Vs and V clusters, which are distinguished by the number of trapped H atoms. This revision eliminated the assumption of V and V cluster migration, required in the original model. Simulation results of the revised model revealed that the spike-like desorption on the peak attributed to Vs and V clusters in the spectra simulated by the original model was an artifact caused by the assumption. In addition, it was suggested that V clusters can exist other than Vs in the specimens after deformation with H charging. It is considered that the revised model is a useful framework for studying Vs and V clusters under H-affected conditions.
Tsubone, Misora*; Shimotsuma, Yasuhiko*; Kono, Yoshio*; Kakizawa, Sho*; Yamada, Hiroki*; Kobayashi, Keita; Shimizu, Masahiro*; Miura, Kiyotaka*
NPG Asia Materials, 18, p.15_1 - 15_16, 2026/04
Times Cited Count：0 Percentile：0.00(Materials Science, Multidisciplinary)Silica glass exhibits diverse structural configurations accompanied with densification under varying temperature and pressure conditions; these factors significantly influence its optical properties, such as the refractive index. However, the fundamental structural mechanisms underlying the optical properties change induced by high pressure treatment and femtosecond laser direct writing remain poorly understood. Herein, we report the similarities and differences in the optical responses of densified silica glass induced by these two methods. The most significant difference is that the laser-irradiated region evolves toward a glass structure characteristic of a high fictive temperature by incorporating non-bridging oxygen defects associated with edge-sharing SiO tetrahedra, which induces distinctly different photoluminescence behaviors compared to high pressure treatment.
Terasawa, Tomoo; Katsube, Daiki*; Yano, Masahiro; Ozawa, Takahiro*; Tsuda, Yasutaka; Yoshigoe, Akitaka; Asaoka, Hidehito; Suzuki, Seiya
Chemistry of Materials, 38(6), p.2933 - 2945, 2026/03
Times Cited Count：0 Percentile：0.00(Chemistry, Physical)Ahn, S. Y.*; Kim, E. S.*; Jeong, S. G.*; Harjo, S.; Kawasaki, Takuro; Gong, W.; Kim, H.-J.*; Hong, S.-J.*; Hong, S. I.*; Kwon, H.*; et al.
Materials Science & Engineering A, 955, p.149839_1 - 149839_18, 2026/03
Lobzenko, I.; Mori, Hideki*; Tsuru, Tomohito
Journal of Materials Research and Technology, 40, p.3798 - 3805, 2026/01
Times Cited Count：1 Percentile：0.00(Materials Science, Multidisciplinary)no abstracts in English
