Single-crystal growth of iridium with [100] and [110] orientations by electron beam zone melting

Wang, Binqiang; Wang, Yuming; Zhong, Hong; Hu, Rui; Liang, Yi; Luo, Xiangyi

doi:10.1016/j.vacuum.2018.05.009

Cited by 6 publications

(1 citation statement)

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“…The first of all, the high technological level in refining and metallurgy of iridium reached in 60-80th years is not lost. The massive iridium single crystals are successfully grown by the mean of the zone melting by the electron beam [54,55]. It means that the new party elaborated the effective technology for the processing irid-ium.…”

Section: The Cause Of Cleavage In Iridiummentioning

confidence: 99%

Brittle Fracture of Iridium. How This Plastic Metal Cleaves?

Panfilov¹

2019

Rev Adv Mater Tech

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The refractory platinum group metal iridium is the unique material, insomuch as it exhibits simultaneously two controversial mechanical properties such as the high plasticity and the inclination to the brittle transcrystalline fracture. Although iridium has the face-centered cubic lattice, it meets some empirical cleavage criteria despite considerable plasticity. This is the so called "iridium problem" and it is not solved until now. The review is aimed to the discussion of the experimental data concerning the deformation behavior of iridium and the crack growth in iridium single crystals on the microscopic (in the single crystalline samples stretched on air) and nano-(in the thin foils for transmission electron microscopy) levels. It is shown that cracks in iridium thin foils grow like a crack in such ductile metals as aluminum, copper, and nickel. Cracks in the bulk iridium single crystals behave like either a brittle trancrystalline crack, when the resource of crystal plasticity has been exhausted, or a notch in ductile metal, when the plastic deformation of the sample is possible.

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Section: The Cause Of Cleavage In Iridiummentioning

confidence: 99%