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Bulge Testing and Interface Fracture Characterization of Plasma-Sprayed and HIP Bonded Zr Coatings on U-Mo

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Abstract

Bulge testing using a pressurized fluid to fracture the interface between bonded material layers along with three-dimensional digital image correlation to measure the sample distortion caused by pressurized fluid was applied to plasma-sprayed coatings. The initiation fracture toughness associated with the bonded materials was measured during the testing. The bulge testing of the uranium-molybdenum alloy plasma sprayed with zirconium and clad in aluminum is presented. The initiation fracture toughness was observed to increase with the increasing cathodic arc-cleaning current and the use of alternating polarity transferred arc current. This dependence was linked to the interface composition of oxide and mixed metal phases along with the interface temperature during spray deposition.

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Acknowledgments

The authors gratefully thank Joel Montalvo for the metallographic preparation of the samples, and Beverly Aikin and Victor Vargas for the HIP cladding. The authors would like to acknowledge the financial support of the US Department of Energy Global Threat Reduction Initiative Reactor Convert program. The Los Alamos National Laboratory, an affirmative action, equal-opportunity employer, is operated by the Los Alamos National Security, LLC, for the National Nuclear Security Administration of the U.S. Department of Energy under contract DE-AC52-06NA25396.

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  1. Los Alamos National Laboratory, Los Alamos, NM, USA

    K. Hollis, C. Liu, R. Leckie & M. Lovato

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  1. K. Hollis
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  2. C. Liu
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  3. R. Leckie
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  4. M. Lovato
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Correspondence to K. Hollis.

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Hollis, K., Liu, C., Leckie, R. et al. Bulge Testing and Interface Fracture Characterization of Plasma-Sprayed and HIP Bonded Zr Coatings on U-Mo. J Therm Spray Tech 24, 271–279 (2015). https://doi.org/10.1007/s11666-014-0198-7

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  • DOI: https://doi.org/10.1007/s11666-014-0198-7

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