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Report No.

Does bulk metallic glass of elemental Zr and Ti exist ?; Verification of the high-pressure formation of amorphous Zr and Ti

Hattori, Takanori   ; Saito, Hiroyuki; Aoki, Katsutoshi; Kaneko, Hiroshi; Okajima, Yuka; Utsumi, Wataru

The high-pressure formation of the bulk metallic glass of elemental Zr and Ti, which has been recently reported, is verified by a newly developed angle dispersive X-ray diffraction (ADX) system using a large volume multi-anvil apparatus equipped with X-ray transparent anvils. The ADX data revealed that Zr and Ti remain as a crystalline form at high-pressure and temperature condition where the amorphization has been reported. The misinterpretation in the previous papers is attributed to the anomalous rapid grain growth that is related to the characteristic lattice dynamic and the resulting anomalously fast self diffusion in the high-temperature phases of Zr and Ti.



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