Pulsed neutron imaging based crystallographic structure study of a japanese sword made by sukemasa in the muromachi period

Kenichi Oikawa, Yoshiaki Kiyanagi, Hirotaka Sato, Kazuma Ohmae, Anh Hoang Pham, Kenichi Watanabe, Yoshihiro Matsumoto, Takenao Shinohara, Tetsuya Kai, Stefanus Harjo, Masato Ohnuma, Sigekazu Morito, Takuya Ohba, Akira Uritani, Masakazu Ito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Energy-resolved neutron imaging using a pulsed neutron source is capable of visualizing crystallographic information over a large area of a sample by analyzing positiondependent Bragg-edge transmission spectra. We applied this method to a Japanese sword, signed by Sukemasa, to elucidate position dependent crystallographic characteristics, including but not limited to: degree of hardening, crystallite size, degree of preferred orientation. By comparing the degree of hardening to that of a contemporary short Japanese sword (dagger), the Sukemasa showed relatively small changes in the position of Bragg-edge (110) and its broadening. No coarse grain was found within the detector resolution (ca. 1 mm), and the crystallite size of the blade area was analyzed to be almost uniform and less than 1 µm. We thus recognize in a comprehensive manner that the Sukemasa sword was manufactured with great care.

Original languageEnglish
Title of host publicationNeutron Radiography - 11th World Conference on Neutron Radiography, WCNR 2018
EditorsFilomena Salvemini, Joseph J. Bevitt
PublisherAssociation of American Publishers
Pages207-213
Number of pages7
ISBN (Print)9781644900567
DOIs
Publication statusPublished - 2020
Externally publishedYes
Event11th World Conference on Neutron Radiography, WCNR 2018 - Sydney, Australia
Duration: Sep 2 2018Sep 7 2018

Publication series

NameMaterials Research Proceedings
Volume15
ISSN (Print)2474-3941
ISSN (Electronic)2474-395X

Conference

Conference11th World Conference on Neutron Radiography, WCNR 2018
Country/TerritoryAustralia
CitySydney
Period9/2/189/7/18

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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