Characterization of as-deposited cold sprayed Cr-coating on Optimized ZIRLO™ claddings
Artikel i vetenskaplig tidskrift, 2021

As-produced Cr-coated Optimized ZIRLO™ cladding material fabricated with the cold-spray (CS) deposition process is studied. Cross-sectional electron microscopy, nano-hardness profiling, transmission electron microscopy, transmission Kikuchi diffraction, and atom probe tomography (APT) were performed to investigate the nature of the CS Cr-coating/Optimized ZIRLO™ interface, the microstructure of the coating, and the effects of the deposition on the Zr-substrate microstructure. The former surface of the Zr-substrate was found to have a highly deformed nano-crystalline microstructure, the formation of which was attributed to dynamic recrystallization occurring during coating deposition. This microstructural change, evaluated with electron backscattered diffraction and nano-hardness profiling, appeared to be confined to a depth of a few microns. Through APT analysis, a 10–20 nm thick intermixed bonding region was observed at the interface between coating and substrate. The chemical composition of this region suggests that this layer originated from a highly localized shearing and heating of a thin volume of the outermost former surface of the substrate. The study of the intermixed bonding region's crystalline structure was performed with high resolution transmission electron microscopy and revealed a distorted hexagonal close-packed structure.

Atom probe tomography

Cold spray deposition

Chromium coatings

Zirconium alloys

Accident tolerant fuels


Andrea Fazi

Chalmers, Fysik, Mikrostrukturfysik

Hisham Aboulfadl

Chalmers, Fysik, Mikrostrukturfysik

Anand Harihara Subramonia Iyer

Chalmers, Fysik, Mikrostrukturfysik

Mohammad Sattari

Chalmers, Fysik, Mikrostrukturfysik

Krystyna Marta Stiller

Chalmers, Fysik, Mikrostrukturfysik

Hans-Olof Andrén

Chalmers, Fysik, Mikrostrukturfysik

Pratik Lokhande

Chalmers, Kemi och kemiteknik, Energi och material

Mattias Thuvander

Chalmers, Fysik, Mikrostrukturfysik

Journal of Nuclear Materials

0022-3115 (ISSN)

Vol. 549 152892

Utveckling av olyckstolerant kärnbränsle

Stiftelsen för Strategisk forskning (SSF) (EM16-0031), 2018-02-01 -- 2023-01-31.


Bearbetnings-, yt- och fogningsteknik

Metallurgi och metalliska material





Chalmers materialanalyslaboratorium



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