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Tailoring the Composition and Structure of Nb-, Si-, and B-Doped Mo-Based Composite Materials in the Self-Propagating High-Temperature Synthesis Metallurgy Process
Inorganic Materials ( IF 0.9 ) Pub Date : 2020-12-14 , DOI: 10.1134/s002016852012002x
D. E. Andreev , Yu. S. Vdovin , V. I. Yukhvid , N. V. Sachkova , T. I. Ignat’eva , I. D. Kovalev

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:

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

更新日期:2020-12-14
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