Characterization of as-deposited cold sprayed Cr-coating on Optimized ZIRLO™ claddings

Fazi, Andrea,1992Chalmers tekniska högskola,Chalmers University of Technology (författare)

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.

Aboulfadl, Hisham,1986Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ahisham (författare)
Harihara Subramonia Iyer, Anand,1990Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)harihara (författare)
Sattari, Mohammad,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)sattari (författare)
Stiller, Krystyna Marta,1947Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)stiller (författare)
Andrén, Hans-Olof,1947Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)andren (författare)
Lokhande, Pratik,1994Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)lokhande (författare)
Thuvander, Mattias,1968Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)matthu (författare)
Chalmers tekniska högskola (creator_code:org_t)

Av författaren/redakt...: Fazi, Andrea, 19 ...; Aboulfadl, Hisha ...; Harihara Subramo ...; Sattari, Mohamma ...; Stiller, Krystyn ...; Andrén, Hans-Olo ...; visa fler...; Lokhande, Pratik ...; Thuvander, Matti ...; visa färre...

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