Properties in Reactive Structure Materials: ZrW2 and HfW2 – High Melting Temperatures, Densities, Hardness, and Exothermic Ignition Energies,Zeitschrift für anorganische und allgemeine Chemie

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Properties in Reactive Structure Materials: ZrW2 and HfW2 – High Melting Temperatures, Densities, Hardness, and Exothermic Ignition Energies
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.1 ) Pub Date : 2020-08-13 , DOI: 10.1002/zaac.202000237
Thomas M. Klapötke ₁ , Jürgen Evers ₂ , Stefan Huber , Gilbert Oehlinger

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ZrW₂ and HfW₂ were prepared by melting the constituent elements in an arc‐furnace. By cooling through perictectic phase lines above approximately 2000 °C, samples of the nominal 1:2 composition were obtained as products consisting of two phases, of which approximately 95 % adopts the MgCu₂ type structure and 5 % the W structure. In ZrW₂ and in HfW₂, the MgCu₂ type structure enables efficient topological compact spacefilling of the smaller W atoms into the cavities of the three‐dimensional net constructed by the larger tetravalent metals Zr and Hf. Correspondingly, very dense and hard alloys are obtained which burn at a crash in air in a strong exothermic ignition reaction. These materials are non‐toxic.

中文翻译：

反应性结构材料的特性：ZrW2和HfW2 –高熔化温度，密度，硬度和放热点火能量

ZRW ₂和HFW ₂被熔融在一电弧炉的组成元件制备。通过约2000℃以上的包晶相线冷却，获得标称1：2组成的样品，其样品由两相组成，其中约95％采用MgCu ₂型结构，而5％采用W结构。在ZrW ₂和HfW _2中，MgCu ₂这种类型的结构可以将较小的W原子高效拓扑紧凑地填充到由较大的四价金属Zr和Hf构成的三维网的腔中。相应地，获得了非常致密和坚硬的合金，它们在空气中以强烈的放热点火反应在碰撞中燃烧。这些材料是无毒的。

更新日期：2020-08-13

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