Published 2021 | Version v1
Miscellaneous Metadata-only

Nanoscale characterization of the metal-oxide interface on a Zr-2.5Nb alloy

Creators

  • 1. Queen's University, Department of Mechanical and Materials Engineering, Kingston, Ontario (Canada)
  • 2. Canadian Nuclear Laboratories, Chalk River, Ontario (Canada)

Description

Canada Deuterium Uranium (CANDU) reactors use Zr-2.5Nb alloy for pressure tubes, and the typical starting microstructure consists of elongated α+β grains. In this study, the microstructure near the metal-oxide interface of a Zr-2.5Nb alloy is characterized after 567 days of exposure to high temperature water. Fresnel imaging was carried out using transmission electron microscopy to investigate the type, distribution, and connectivity of nano-porosity through the oxide layer. The observed nano-porosity may provide shot-circuit pathways for the transport of hydrogen or ions through the film to the metal/oxide or oxide/solution interfaces. Scanning transmission electron microscopy (STEM) is used to study the microstructure of the oxide and energy-dispersive X-ray (EDX) spectroscopy is used to reveal the element distributions. A key observation was decomposition the of β phase at the metal-oxide interface. (author)

Availability note (English)

Available from the Canadian Nuclear Society, Toronto, Ontario (Canada).
Part of:
Enabling net zero carbon emissions through clean nuclear power. 40th annual conference of the Canadian Nuclear Society (virtual) and 45th annual CNS/CNA student conference (virtual)

Additional details

Publishing Information

Publisher
Canadian Nuclear Society
Imprint Place
Toronto, Ontario (Canada)
Imprint Title
Enabling net zero carbon emissions through clean nuclear power. 40th Annual CNS conference and 45th CNS/CNA student conference (virtual)
Imprint Pagination
vp.
Journal Page Range
[5 p.]
Report number
INIS-CA--0016

Conference

Title
40. Annual Canadian Nuclear Society Conference (Virtual); 45. Annual CNS/CNA Student Conference (Virtual)
Dates
6-9 Jun 2021
Place
Toronto (Canada)

INIS

Country of Publication
Canada
Country of Input or Organization
Canada
INIS RN
53064615
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
DECOMPOSITION; GRAIN SIZE; MICROSTRUCTURE; OXIDES; POROSITY; PRESSURE TUBES; ZIRCALOY
Descriptors DEC
ALLOYS; CHALCOGENIDES; CHEMICAL REACTIONS; MICROSTRUCTURE; OXYGEN COMPOUNDS; SIZE; TRANSITION ELEMENT ALLOYS; TUBES; ZIRCONIUM ALLOYS; ZIRCONIUM BASE ALLOYS

Optional Information

Notes
24 refs., 3 figs.