Functional materials for the piping of nuclear propulsion systems

Ризаханов, Р. Н.; Polyanskii, M. N.; Barmin, A. A.; Rudshtein, R. I.

doi:10.1134/s2075113314020178

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2019

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“…This is because refractory metals are primarily characterised by high melting point and density, and therefore are able to withstand the reactor's high temperatures. In fact, molybdenum thermal blankets have been proposed for piping of nuclear systems in the work of Rizakhanov et al [21]. Additionally, tungsten and its alloys are considered to be the best candidate as plasma-facing materials [22].…”

Section: Introductionmentioning

confidence: 99%

Functionally graded structures of refractory metals by wire arc additive manufacturing

Marinelli

Martina

Lewtas

et al. 2019

Science and Technology of Welding and Joining

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Functionally graded components are usually preferred for severe and critical service conditions, thanks to the possibility of achieving different complimentary material properties within the same structure. Wire + Arc Additive Manufacturing is an emerging technology which lends itself well to the production of sound graded structures. In this study, an integral structure of two functional gradients, namely tantalum to molybdenum, and molybdenum to tungsten, was successfully deposited. A linear gradient was observed in both composition and hardness. Microstructure, elemental composition and hardness were characterised as a function of position, and discussed. The study demonstrates that WAAM has the potential to successfully deposit functionallygraded structures of refractory metals, obtaining controlled properties.

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Section: Introductionmentioning

confidence: 99%