作者
Yogesh K Vohra, Philemon T Spencer
发表日期
2001/4/2
期刊
Physical Review Letters
卷号
86
期号
14
页码范围
3068
出版商
American Physical Society
简介
Group IV transition metals titanium, zirconium, and hafnium are expected to transform from an ambient hexagonal close packed (hcp, α-phase) to a body centered cubic (bcc, β-phase) at high pressures. This transition path is usually facilitated by the occurrence of an intermediate hexagonal phase (distorted bcc, ω-phase). The existence of a bcc phase in zirconium and hafnium at high pressures has been known for the past ten years; however, its occurrence in titanium has been theoretically predicted but never observed. We report a novel unexpected transformation in titanium metal from an omega phase to an orthorhombic phase (distorted hcp, γ-phase) at a pressure of 116±4 GPa.
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