Effect of ion irradiation and implantation of H and He on the corrosion behavior of austenitic stainless steel

Nemoto, Yoshiyuki; Miwa, Yukio; Kaji, Yoshiyuki; Tsukada, Takashi

Journal of Nuclear Materials, 343(1-3), p.313 - 317, 2005/08

https://doi.org/10.1016/j.jnucmat.2005.01.024

The aim of this work is to evaluate corrosion behavior of irradiated materials these would be used in spallation neutron sources. Solution annealed high purity Fe-18Cr-12Ni specimens were used in this study. Ni, H+ and He ions were irradiated at 473 to 773K. After corrosion procedure, the specimens were examined with atomic force microscope (AFM) to evaluate corrosion behavior. It was shown that the corroded volume of irradiated area increased with radiation damage. Higher H content at lower temperature accelerated corrosion, but H at higher temperature did not accelerate corrosion. He suppressed corrosion, and corroded volume was larger for the specimens irradiated at higher temperature than these at lower temperature. It is suggested from this study that H and He affect the corrosion behavior of irradiated alloy.

JNC-JAERI united research report; A Study on degradation of structural materials under irradiation environment in nuclear reactors (Joint research)

Hoshiya, Taiji*; Ueno, Fumiyoshi; Takaya, Shigeru*; Nagae, Yuji*; Nemoto, Yoshiyuki; Miwa, Yukio; Aoto, Kazumi*; Tsukada, Takashi; Abe, Yasuhiro*; Nakamura, Yasuo*; et al.

JAERI-Research 2004-016, 53 Pages, 2004/10

JAERI-Research-2004-016.pdf:22.07MB

Japan Nuclear Cycle Development Institute (JNC) and Japan Atomic Energy Research Institute (JAERI) have started a JNC-JAERI united research program cooperatively in 2003, which has been aimed for efficient progress and synergistic effect on the research activities of both Institutes in order to lead the facing task of unification between JNC and JAERI. This study has been chosen one of the united research themes, and the purpose of it is to clarify damage mechanism of structural materials under irradiation, and then to develop the methods for damage evaluation and detection in earlier stage of progressing process of damage. In fiscal year 2003, magnetic flux density distribution (JNC) and micro-corrosion (JAERI) measurement apparatus were newly developed and equipped in Hot Facilities in two Institutes, respectively. These apparatus were designed and produced in consideration of radiation resistance and remote-controlled operation to equip in hot cells. We will start the study on neutron irradiation damage by employing the two apparatus as the next step.

Modification of C thin films by ion 7-MeV C ion irradiation

Narumi, Kazumasa; Xu, Y.; Miyashita, Kiyoshi*; Naramoto, Hiroshi

JAERI-Review 2002-035, TIARA Annual Report 2001, p.176 - 178, 2002/11

no abstracts in English

Preparation of anatase and rutile thin films by controlling oxygen partial pressure

Syarif, D. G.; Miyashita, Atsumi; Yamaki, Tetsuya; Sumita, Taishi*; Choi, Y.; Ito, Hisayoshi

Applied Surface Science, 193(1-4), p.287 - 292, 2002/06

https://doi.org/10.1016/S0169-4332(02)00532-9

Titanium dioxide () films on glass substrates were prepared by pulsed laser deposition (PLD) technique. The dependence of crystal structure, morphology and photocatalytic activity on oxygen partial pressure were investigated using X-ray diffraction (XRD), Atomic force microscope (AFM) and UV-VIS Spectrophotometer. By increasing oxygen partial pressure, the surface morphology changed from smooth to rough, and the crystal structure changed from rutile to anatase at fixed substrate temperature of 773 K. The change of the surface morphology and the formation of anatase structure by variation of oxygen partial pressure resulted in an increase of photocatalytic activity.

Radiation effects and surface deformation of silica by ion microbeam

Nishikawa, Hiroyuki*; Souno, T.*; Hattori, M.*; Nishihara, Y.*; Oki, Y.*; Watanabe, E.*; Oikawa, Masakazu*; Kamiya, Tomihiro; Arakawa, Kazuo

Nuclear Instruments and Methods in Physics Research B, 191(1-4), p.342 - 345, 2002/05

https://doi.org/10.1016/S0168-583X(02)00530-X

no abstracts in English

AFM Investigation of growth process of C thin films on a KBr(001) surface

Narumi, Kazumasa; Naramoto, Hiroshi

Diamond and Related Materials, 10(3-7), p.980 - 983, 2001/03

https://doi.org/10.1016/S0925-9635(00)00541-0

no abstracts in English

SPM characterization of substrate surfaces prepared for carbon-related-film deposition

Narumi, Kazumasa; Yamamoto, Shunya; Naramoto, Hiroshi

Materials Research Society Symposium Proceedings, Vol.587, p.O8.4.1 - O8.4.6, 2000/00

no abstracts in English

Substrate-specific functional membranes based on etched ion tracks

Yoshida, Masaru; Asano, Masaharu; Omichi, Hideki; Spohr, R.*; Katakai, Ryoichi*

Radiat. Meas., 28(1-6), p.799 - 810, 1997/00

https://doi.org/10.1016/S1350-4487(97)00187-X

no abstracts in English

In-situ measurement of leaching rate of fuel debris

Kitagaki, Toru; Ikeda, Atsushi

no journal, , 

Large amounts of fuel debris are expected to be accumulated under the cooling water in the containment vessel of 1F. Parts of them could be leached and dispersed into the water. Therefore, the leaching behavior of fuel debris should be estimated. However, it is difficult to evaluate the leaching rate by traditional methods, such as solution analysis, because fuel debris is multiphase and heterogeneous materials. On the other hands, in-situ observation methods such as interferometric microscope can measure leaching rate by surface shape change. Zircon, ZrSiO, is expected to be one of the main phases in 1F fuel debris. In this study, an interferometric microscope was applied to the measurement of the leaching rate of natural zircon under the flowing aqueous solutions with pH = 0 (HCl), 7 (ultrapure water), and 14 (aq NaOH) based on the change of zircon surface. It was confirmed that the dissolution rates under different aqueous solution can be measured by the applied method.