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首页> 外文期刊>Philosophical Magazine Letters >A new 1/1 crystal approximant to the stable Ti-Zr-Ni icosahedral quasicrystal
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A new 1/1 crystal approximant to the stable Ti-Zr-Ni icosahedral quasicrystal

机译:与稳定的Ti-Zr-Ni二十面体准晶体近似的新的1/1晶体

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We report here the discovery of a new bcc 1/1 crystal approximant (W-phase) to the stable icosahedral quasicrystal (i-phase) discovered recently in Ti-Zr-Ni alloys. As-cast Ti-Zr-Ni ingots, which originally contain only the C14 Laves and the hcp solid-solution phases, transform almost completely to the i-phase after annealing at 570oC for 64 h. Anneals at higher temperature (610oC) lead to the formation of the bcc W-phase, with a = 1.432 nm. Preliminary X-ray 0 diffraction studies indicate that the structure of the W-phase is similar to that of the Al-Mg-Zn Bergman phase, or the isostructural Al-Li-Cu R-phase, supporting a previous proposal that i-(Ti-Zr-Ni) is structurally different from i-(Ti-Cr-Si-O) or i-(Ti-Mn-Si-O), but similar to i-(Al-Li-Cu) or i-(Al-Mg-Zn).
机译:我们在这里报告的是,最近在Ti-Zr-Ni合金中发现的稳定的二十面体准晶体(i相)的新bcc 1/1晶体近似(W相)的发现。最初仅包含C14 Laves和hcp固溶相的铸态Ti-Zr-Ni锭在570oC退火64 h后几乎完全转变为i相。高温(610oC)退火导致形成bcc W相,其a = 1.432 nm。初步的X射线0衍射研究表明,W相的结构类似于Al-Mg-Zn Bergman相或同构Al-Li-Cu R相的结构,支持了先前的i-( Ti-Zr-Ni)在结构上不同于i-(Ti-Cr-Si-O)或i-(Ti-Mn-Si-O),但与i-(Al-Li-Cu)或i-( Al-Mg-Zn)。

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