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Syntheses and structural characterization of zirconium-tin and zirconium-lead binary and ternary systems

机译:锆锡和锆铅二元和三元体系的合成和结构表征

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摘要

The binary zirconium-tin system was reinvestigated. The A15 phase appears to be a line phase with a Zr[subscript]4Sn composition. This phase is extremely unstable with oxygen contamination. The Zr[subscript]5Sn[subscript]3 (Mn[subscript]5Si[subscript]3-type) and Zr[subscript]5Sn[subscript]4 (Ti[subscript]5Ga[subscript]4-type) compounds are line phases below 1000°C, the latter being a self-interstitial phase of the former. ZrSn[subscript]2 is the tin-richest phase. There is an one-phase region between these phases with partial self-interstitials at high temperatures. The zirconium-lead system behaves similarly: there are an A15 phase with a Zr[subscript]~5.8Pb composition, Zr[subscript]5Pb[subscript]3 (Mn[subscript]5Si[subscript]3-type) and Zr[subscript]5Pb[subscript]4 (Ti[subscript]5Ga[subscript]4-type) compounds, and a high temperature solid solution between Zr[subscript]5Pb[subscript]\u3e3.5 and Zr[subscript]5Pb[subscript]4 from below 1000°C; however, the ZrSn[subscript]2 analogue is not formed;The Mn[subscript]5Si[subscript]3-type phases in these systems can accommodate third elements interstitially to form stoichiometric compounds Zr[subscript]5Sn[subscript]3Z (Z = B, C, N, O, Al, Si, P, S, Cu, Zn, Ga, Ge, As and Se) and Zr[subscript]5Pb[subscript]3Z (Z = Al, Si, P, S, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Ag, Cd, In, Sn, Sb and Te) as well as their self-interstitial derivatives. The stoichiometric nature of most of the interstitial phases was confirmed by structure analyses of single crystals for Z = C, O, and Ge in Zr[subscript]5Sn[subscript]3Z and Z=Zn and Pb in Zr[subscript]5Pb[subscript]3Z and of powder for Zr[subscript]5Sn[subscript]3Ga as well as by synthetic considerations. The crystal structures show strong zirconium-interstitial interactions. A substoichiometric interstitial phase also exists for Zr[subscript]5Sn[subscript]3S[subscript] x (0.5 ≤ x ≤ 1.0). Vapor phase transport reactions for Z = Al, Zn, and Pb in Zr[subscript]5Pb[subscript]3Z were successful with the transporting agent ZrCl[subscript]4;The systems Zr-Sn-T, T = Fe, Co and Ni, did not produce stoichiometric interstitial phases Zr[subscript]5Sn[subscript]3T. Instead, the interstitial phases for these elements are formed only with excess tin that partially occupies the interstitial site together with a T element. Reducing the amount of tin in these systems yields two new phases; Zr[subscript]5Sn[subscript] 2 + xFe[subscript] 1 - x (0 ≤ x ≤ 0.28) (W[subscript]5Si[subscript]3-type) and Zr[subscript]6Sn[subscript]2Fe (Zr[subscript]6Al[subscript]2Co-type) as characterized by X-ray single crystal analyses. A cobalt analogue for the latter was also synthesized. ftn*DOE Report IS-T-1505. This work was performed under contract No. W-7405-Eng-82 with the U.S. Department of Energy.
机译:重新研究了二元锆锡系统。 A15相看起来是具有Zr [4] Sn组成的线相。由于氧污染,该相非常不稳定。 Zr [下标] 5Sn [下标] 3(Mn [下标] 5Si [下标] 3-型)和Zr [下标] 5Sn [下标] 4(Ti [下标] 5Ga [下标] 4-型)化合物为线相低于1000°C,后者是前者的自填隙相。 ZrSn [下标] 2是最富锡的相。在这些相之间存在一个单相区域,在高温下具有部分自填隙。锆铅系统的行为类似:存在具有Zr [下标]〜5.8Pb组成的A15相,Zr [下标] 5Pb [下标] 3(Mn [下标] 5Si [下标] 3-型)和Zr [下标] ] 5Pb [下标] 4(Ti [下标] 5Ga [下标] 4-型)化合物以及Zr [下标] 5Pb [下标] \ u3e3.5和Zr [下标] 5Pb [下标] 4之间的高温固溶体从1000°C以下;然而,没有形成ZrSn [2] 2类似物;这些系统中的Mn [5] 5Si [3]型相可以间隙地容纳第三元素,从而形成化学计量的化合物Zr [5] Sn [3Z](Z = B,C,N,O,Al,Si,P,S,Cu,Zn,Ga,Ge,As和Se)和Zr [下标] 5Pb [下标] 3Z(Z = Al,Si,P,S,Fe ,Co,Ni,Cu,Zn,Ga,Ge,As,Se,Ag,Cd,In,Sn,Sb和Te)及其自填隙衍生物。通过Zr [下标] 5Sn [下标] 3Z中Z = C,O和Ge的单晶结构分析以及Zr [下标] 5Pb [下标中的Z = Zn和Pb]的单晶结构分析,证实了大多数间隙相的化学计量性质。 Zr [下标] 5Sn [下标] 3Ga的粉末为[3Z]和粉末,以及综合考虑。晶体结构显示出很强的锆-间隙相互作用。 Zr [下标] 5Sn [下标] 3S [下标] x(0.5≤x≤1.0)也存在亚化学计量的填隙相。 Zr [5] Pb [3]中Z = Al,Zn和Pb的汽相输运反应通过ZrCl [4]成功实现; Zr-Sn-T体系,T = Fe,Co和Ni ,没有产生化学计量的间隙相Zr [下标] 5Sn [下标] 3T。取而代之的是,这些元素的填隙相仅由过量的锡形成,该过量的锡与T元素一起部分占据填隙位置。减少这些系统中的锡含量可产生两个新阶段: Zr [下标] 5Sn [下标] 2 + xFe [下标] 1-x(0≤x≤0.28)(W [下标] 5Si [下标] 3-型)和Zr [下标] 6Sn [下标] 2Fe(Zr [通过X射线单晶分析表征的[下标] 6Al [下标] 2Co型)。还合成了后者的钴类似物。 ftn * DOE报告IS-T-1505。这项工作是根据与美国能源部签订的W-7405-Eng-82合同进行的。

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  • 作者

    Kwon, Young-Uk;

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  • 年度 1991
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  • 原文格式 PDF
  • 正文语种 en
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