2019
DOI: 10.17586/2687-0568-2019-1-1-27-45
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Brittle Fracture of Iridium. How This Plastic Metal Cleaves?

Abstract: 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… Show more

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“…6f and Ref. [11]). Moreover, the cleavage cracks in iridium single crystal with abraded surface after elongation of 10-18% (Fig.…”
Section: Discussionmentioning
confidence: 92%
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“…6f and Ref. [11]). Moreover, the cleavage cracks in iridium single crystal with abraded surface after elongation of 10-18% (Fig.…”
Section: Discussionmentioning
confidence: 92%
“…The refractory FCC-metal iridium cleaves under tensile stress at room temperature after considerable elongation or macroscopic plasticity [11]. Therefore, the cleavage crack morphology in iridium single crystals under , c -crack in silicon thin foil for TEM at temperature higher than brittle to ductile transition temperature [9]; d -crack in MgO thin foil for TEM [10].…”
Section: Discussionmentioning
confidence: 99%
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