Evaluation of properties and special features for high-temperature applications of rhenium

Bryskin, Boris D.

doi:10.1063/1.41837

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…The engineering stress/engineering strain curve for the compression tests is shown in Figure 1. The samples showed high rates of work hardening, similar to what has been reported previously [2,4].…”

Section: Resultssupporting

confidence: 88%

“…It is also unusual among refractory metals in that it has no known ductile to brittle transition. For this reason, as well as its excellent ductility and formability, high temperature strength, and creep resistance, it is an attractive material in extreme environment applications [3,4]. However, limited availability and difficulty of extracting Re has limited both the application as well as the knowledge of Re.…”

Section: Introductionmentioning

confidence: 99%

“…However, limited availability and difficulty of extracting Re has limited both the application as well as the knowledge of Re. Characterization of the deformed microstructure of Re has been limited primarily to optical microscopy [3,4] as well as a limited number of transmission electron microscopy (TEM) studies [1,2,5]. These studies reported observations of dislocation plasticity occurring on the basal and prismatic planes, as well as twinning activity on {1012}, {1122}, and {1121}.…”

Section: Introductionmentioning

confidence: 99%

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Twin boundary interactions with grain boundaries investigated in pure rhenium

Kacher

Minor

2014

Acta Materialia

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The mechanical behavior of pure rhenium was investigated using uniaxial compression tests, transmission electron microscopy, and electron backscatter diffraction characterization. The plasticity was characterized by a large amount of twin formation and propagation, including twin transmission across grain boundaries. In-depth analysis of the interactions of {1121}<1126> twins with grain boundaries found that grain boundaries with misorientation angles below ~25° allowed twin transmission while grain boundaries with higher angles did not. Similar to dislocation interactions with grain boundaries, twin transmission was largely dictated by the minimization of the angle between the shear vectors of the incoming and outgoing twins.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Twin boundary interactions with grain boundaries investigated in pure rhenium

Kacher

Minor

2014

Acta Materialia

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“…As the only refractory metal with a hexagonal close‐packed structure, as opposed to body‐centered cubic for all others, rhenium possesses a unique combination of mechanical properties. Particularly its ability to retain its ductility from subzero to elevated temperatures, its high melting point of 3453 K as well as a modulus of elasticity of 460 GPa that's only second to iridium and osmium arouse great interest [2] . Rhenium is chemically inert in oxygen free atmospheres, has the greatest tensile strength and creep‐resistance at elevated temperatures of all the refractory metals and is the only refractory metal not forming carbides making it ideally suited for coating carbon materials [3] .…”

Section: Introductionmentioning

confidence: 99%

In situ X‐ray diffraction studies on the production process of rhenium

Keilholz

Kohlmann

Uhlenhut³

et al. 2022

Zeitschrift anorg allge chemie

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Rhenium powder is industrially produced in a two‐step reaction by reducing NH4ReO4 with hydrogen at 623 and 1173 K. In this study, both steps of the production process have been investigated via in situ X‐ray powder diffraction. Up to 550 K no reaction with hydrogen can be observed. Between 550 K and 623 K poorly crystalline rhenium is formed. Crystallinity is increased during the second step at 1173 K. Annealing under hydrogen or nitrogen provides a comparable product in respect to the examined crystal and real structure parameters independent of the gas atmosphere.

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“…High vacuum, thus low oxygen partial pressure, environments produced in TIMS systems are what enable the successful use of rhenium as a thermal ionization filament. Despite its susceptibility to oxidation and terrestrial scarcity, rhenium has remained an important material in the production of turbine blades [12], catalysts [13], and heating elements [14]; consequently, rhenium has been the subject of scientific investigations for many decades [15, 16, 17, 18, 19, 20, 21, 22, 23]. Despite these efforts, little is known about the chemical identities of species involved in catalytic [24] and surface ionization mechanisms [25, 26] due to the challenges associated with in-situ analysis.…”

Section: Introductionmentioning

confidence: 99%

Ambient aging of rhenium filaments used in thermal ionization mass spectrometry: Growth of oxo-rhenium crystallites and anti-aging strategies

Mannion

Wellons

Shick

et al. 2017

Heliyon

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Degassing is a common preparation technique for rhenium filaments used for thermal ionization mass spectrometric analysis of actinides, including plutonium. Although optimization studies regarding degassing conditions have been reported, little work has been done to characterize filament aging after degassing. In this study, the effects of filament aging after degassing were explored to determine a “shelf-life” for degassed rhenium filaments, and methods to limit filament aging were investigated. Zone-refined rhenium filaments were degassed by resistance heating under high vacuum before exposure to ambient atmosphere for up to 2 months. After degassing the nucleation and preferential growth of oxo-rhenium crystallites on the surface of polycrystalline rhenium filaments was observed by atomic force microscopy and scanning electron microscopy (SEM). Compositional analysis of the crystallites was conducted using SEM-Raman spectroscopy and SEM energy dispersive X-ray spectroscopy, and grain orientation at the metal surface was investigated by electron back-scatter diffraction mapping. Spectra collected by SEM-Raman suggest crystallites are composed primarily of perrhenic acid. The relative extent of growth and crystallite morphology were found to be grain dependent and affected by the dissolution of carbon into filaments during annealing (often referred to as carbonization or carburization). Crystallites were observed to nucleate in region specific modes and grow over time through transfer of material from the surface. Factors most likely to affect the rates of crystallite growth include rhenium substrate properties such as grain size, orientation, levels of dissolved carbon, and relative abundance of defect sites; as well as environmental factors such as length of exposure to oxygen and relative humidity. Thin (∼180 nm) hydrophobic films of poly(vinylbenzyl chloride) were found to slow the growth of oxo-rhenium crystallites on the filament surfaces and may serve as an alternative carbon source for filament carburization.

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Evaluation of properties and special features for high-temperature applications of rhenium

Cited by 10 publications

References 11 publications

Twin boundary interactions with grain boundaries investigated in pure rhenium

Twin boundary interactions with grain boundaries investigated in pure rhenium

In situ X‐ray diffraction studies on the production process of rhenium

Ambient aging of rhenium filaments used in thermal ionization mass spectrometry: Growth of oxo-rhenium crystallites and anti-aging strategies

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