Search


Information
ICMST-Tohoku 2018
Oct. 23 - 26, 2018
Sendai, Japan
ICMST-Shenzhen 2016
Nov 1 - 4, 2016
Shenzhen, China
(EXIT THIS PAGE)
ICMST-Kobe 2014
Nov 2(Sun) - 5(Wed), 2014
Kobe, Japan
Nuclear Regulation Authority Outline of the New Safety Standards for Light Water Reactors for Electric Power Generation
For Public Comment
Outline of New Safety Standard (Design Basis)
For Public Comment
New Safety Standards (SA) Outline (Draft)
For Public Comment
Outline of New Safety Standard(Earthquake and Tsunami)(DRAFT)
Issues
 

Vol.10 No.2(Aug)
Vol.10 No.1(May)
Vol.9 No.4(Feb)
Vol.9 No.3(Nov)
< Other Issues

 

Occasional Topics
OTjapan Measures for Tsunami Striking Nuclear Power Station in Japan
Special Article: The Great Tohoku Earthquake (1)
OTjapan The Tragedy of “To Be” Principle in the Japanese Nuclear Industry
EJAMOT_CN3_Figure1_The_outside_view_of_CEFR OTChinaPlanning and Consideration on SFR R&D Activities in China
< All Occasional Topics

Featured Articles
EJAM7-3NT72 A New Mechanical Condition-based Maintenance Technology Using Instrumented Indentation Technique
EJAM7-3NT73 Survey robots for Fukushima Daiichi Nuclear Power Plant

JSM
Contacts
(EJAM): ejam@jsm.or.jp
(JSM): secretariat@jsm.or.jp
HP: http://www.jsm.or.jp
(in English)

 

Vol.14 No.1previousAA179
Academic Articles
Regular Paper Vol.14 No.1 (2022) p.1 - p.11
 

Improved three-dimensional atom probe tomography procedures for analyzing irradiation-induced microstructures

 

Ba Vu Chinh NGUYEN1,5,1*, Kenta MURAKAMI1,2,2*, Liang CHEN3, Phongsakorn PRAK TOM4, and Xinrun CHEN1

 
1 Nagaoka University of Technology, 1603 1 Kamitomioka, Nagaoka City, Niigata 940 2188, Japan
2 The University of Tokyo, 7 Chome 3 1 Hongo, Bunkyo City, Tokyo 113 8654, Japan
3 SJTU Paris Elite Institute of Technology, Shanghai Jiao Tong University, Shanghai 200240, China
4 Malaysian Nuclear Agency, Bangi, 43000 Kajang, Selangor, Malaysia
5 University of Science and Education, The University of Danang, Danang 555700, Vietnam
 
Abstract
Three dimensional atom probe tomography (APT) is an excellent technique for identifying nanometer sized solute atom enrichment regions, but the relationship between these nano features and crystal orientation has not been well analyzed, except for in some semiconductor materials. In this study, a method that combines crystal orientation analysis of field desorption map and geometrical calculations to improve the reconstruction parameters for APT analysis was applied. Spherical Cu rich clusters and planar Mn and Ni segregations on dislocation loops in Fe model alloys after ion irradiation were used as indicators for this analysis. The matrix atoms were well reconstructed. In addition, Cu enriched regions formed as discrete clusters, while Mn and Ni enriched regions tended to be connected as part of a torus. The Cu rich clusters had an oval shape with the smaller dimension along the z axis, which may be due to the difference in the field evaporation between Cu(I) and Fe(II). The orientations of some Mn and Ni segregations were found by analyzing the desorption images, proving the decoration on the edge of dislocation loops. The distribution of solute atoms in the iron lattice was consistent with previous studies, confirming the correctness of this method for analyzing minority elements distributed in metal alloys.
 
Keywords
APT, solute atoms, dislocation loop, nano features, crystal orientation.
 
Full Paper: PDF
Article Information
Article history:
Received 09 January 2022
Accepted 11 July 2022