Does bulk metallic glass of elemental Zr and Ti exist?
Does bulk metallic glass of elemental Zr and Ti exist?
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DOI：
10.1103/physrevlett.96.255504
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发表时间：
2006-06-30
影响因子：
8.6
通讯作者：
Utsumi, Wataru
中科院分区：
文献类型：
--
作者：
Hattori, Takanori;Saitoh, Hiroyuki;Utsumi, Wataru
为了验证元素Zr和Ti的块体金属玻璃的高压形成，Zhang和Zhao [Nature（伦敦）430，332（2004）]和Y. Wang等人[Phys. Rev. Lett. 95，155501（2005）]最近报道，通过我们新开发的使用二维检测器和X射线透明砧的原位角色散X射线衍射来研究高压状态。尽管在一维能量色散数据中的所有布拉格峰消失，但二维角度色散数据显示即使在报告非晶化的条件下也有几个强烈的布拉格点。这一发现表明，Zr和Ti没有转变成非晶态，但它们的晶粒尺寸变大，这导致能量色散数据中的布拉格峰缺失。
To verify the high-pressure formation of the bulk metallic glass in elemental Zr and Ti, which Zhang and Zhao [Nature (London) 430, 332 (2004)] and Y. Wang et al. [Phys. Rev. Lett. 95, 155501 (2005)] recently reported, the high-pressure states were investigated by our newly developed in situ angle-dispersive x-ray diffraction using a two-dimensional detector and x-ray transparent anvils. Despite the disappearance of all the Bragg peaks in the one-dimensional energy-dispersive data, two-dimensional angle-dispersive data showed several intense Bragg spots even at the conditions where the amorphization was reported. This finding suggests that Zr and Ti do not transform into an amorphous state, but that their grain size becomes large, which causes the missing Bragg peaks in energy-dispersive data.