真空烧结和高温合成后 Ti-Al-B/TiB2 体系粉末材料的相组成和结构

IF 0.4 4区 物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY
E. N. Korosteleva, V. V. Korzhova
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引用次数: 0

摘要

根据基本粉末(Ti、Al 和 B)形式的成分组合和使用二硼化钛(TiB2)化合物成品,研究了在真空烧结和高温自蔓延合成(SHS)模式合成过程中形成的 Ti-Al-B 系统粉末材料的结构和相组成。在计算各组分比例时,相互作用元素的数量足以形成 TiAl3 + TiB2 两相成分。在烧结 Ti + Al + TiB2 混合物时,二硼化物被保留下来,但由于硼迁移到游离钛中,导致硼的重新分布,因此出现了 TiB。研究发现,以元素粉末(钛、铝和硼)为基础的混合物在高放热效应条件下烧结压实物,结果样品被破坏。这使得在燃烧模式下的高温合成条件下使用这种混合物成为可能。经过真空烧结和 SHS 压制,铝化 TiAl3 和二硼化钛(TiB2)主要由元素粉末(Ti、Al 和 B)混合物形成。在这种情况下,可以观察到一些过渡相。结果表明,在合成 Ti + Al + B 混合物后,可以获得一种粉末产品,该粉末产品可以很好地烧结压实物,同时保持其形状,并略有收缩。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Phase Composition and Structure of Powder Materials of the Ti–Al–B/TiB2 System After Vacuum Sintering and High-Temperature Synthesis

The structure and phase composition of powder materials of the Ti–Al–B system formed in the process of vacuum sintering and synthesis in the mode of high temperature self-propagating synthesis (SHS) are considered depending on the combination of components in the form of elementary powders (Ti, Al and B) and using the finished titanium diboride (TiB2) compound. The proportions of the components were calculated in such a way that the number of interacting elements was sufficient to form a two-phase TiAl3 + TiB2 composition. When sintering the Ti + Al + TiB2 mixture, the diboride is retained, but the presence of TiB is noted as a result of the redistribution of boron due to its migration into free titanium. It was discovered that sintering of compacts from the mixture based on elemental powders (Ti, Al and B) occurs under conditions of high exothermic effect, as a result of which the samples were destroyed. This made it possible to use this mixture under conditions of high-temperature synthesis in combustion mode. As a result of both vacuum sintering and SHS compacting, aluminide TiAl3 and titanium diboride (TiB2) are mainly formed from a mixture of elemental powders (Ti, Al and B). In this case, some transition phases can be observed. It is shown that after the synthesis of the Ti + Al + B mixture, it is possible to obtain a powder product from which compacts are well sintered while maintaining their shape with a slight shrinkage.

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来源期刊
Russian Physics Journal
Russian Physics Journal PHYSICS, MULTIDISCIPLINARY-
CiteScore
1.00
自引率
50.00%
发文量
208
审稿时长
3-6 weeks
期刊介绍: Russian Physics Journal covers the broad spectrum of specialized research in applied physics, with emphasis on work with practical applications in solid-state physics, optics, and magnetism. Particularly interesting results are reported in connection with: electroluminescence and crystal phospors; semiconductors; phase transformations in solids; superconductivity; properties of thin films; and magnetomechanical phenomena.
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