Abstract—

We have examined for the first time the feasibility of producing cast Nb-, Si-, and B-doped Mo-based composite materials by a spin-casting self-propagating high-temperature synthesis metallurgy method and obtained new results regarding control over their composition and structure. In synthesis, we used combinations of a highly exothermic (MoO₃/Nb₂O₅/Al/Si/B) and a low-exothermic (Mo/Nb/Si/B) composition. We have assessed the effect of the ratio of the ratio of the highly exothermic and low-exothermic compositions (α) and acceleration (a) on the composition and structure of the cast composite materials. The mixtures have been shown to be capable of combustion at up to 80% low-exothermic composition. The combustion products have cast form in the range 0 ≤ α ≤ 65%. At α in the range from 0 to 40% and accelerations from 40g to 400g, the combustion products have the form of a two-layer ingot: the lower layer (Mo–Nb–Si–B) consists of the required product and the upper layer (Al₂O₃) is a slag product. The optimal parameters for the preparation of cast Mo–Nb–Si–B materials are α = 20–30% and a > 100g.

中文翻译：

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在自蔓延高温合成冶金工艺中定制Nb，Si和B掺杂的Mo基复合材料的成分和结构

摘要-

我们首次研究了通过自流延自蔓延高温合成冶金方法生产铸造的Nb，Si和B掺杂的Mo基复合材料的可行性，并获得了控制其成分的新结果和结构。在合成中，我们使用了高放热（MoO ₃ / Nb ₂ O ₅ / Al / Si / B）和低放热（Mo / Nb / Si / B）成分的组合。我们评估了高放热成分和低放热成分之比（α）与加速度（a）关于铸造复合材料的成分和结构。混合物已被证明能够以高达80％的低放热成分燃烧。燃烧产物的铸型范围为0≤α≤65％。在α的范围从0到40％，加速度从40 g到400 g时，燃烧产物具有两层铸锭的形式：下层（Mo–Nb–Si–B）由所需的产物和上层（Al ₂ O ₃）是炉渣产物。制备Mo–Nb–Si–B铸造材料的最佳参数为α= 20–30％和a > 100 g。