Abstract—

We have studied the potentialities of dispersion and precipitation modification of a cobalt alloy in combustion mode under the effect of centrifugal forces. The starting mixture consisted of Co₃O₄, Cr₂O₃, Nb₂O₅, MoO₃, and Al, with titanium carbide and a mechanical mixture of titanium powder and carbon black as modifying additives. The basic mixture has been shown to burn in a wide range of titanium carbide additions under normal conditions. The use of a centrifugal force field allows the phase separation limit to be increased from 17.5 to 20% titanium carbide. In the case of precipitation modification, the system has greater potential for both combustion and phase separation, and the structural constituents of the alloy are characterized by a smaller size and finer structure. We have proposed a sequence of chemical reactions involved in the modification by the precipitation mechanism, in which Co₃O₄ decomposition and subsequent release of active oxygen play a key role.

中文翻译：

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具有分散和沉淀改性的钴合金的燃烧合成的一般方面

摘要-

我们研究了在离心力作用下燃烧模式下钴合金的分散和沉淀改性的潜力。起始混合物由 Co ₃ O ₄、Cr ₂ O ₃、Nb ₂ O ₅、MoO _{3 组成}和铝，以碳化钛和钛粉和炭黑的机械混合物作为改性添加剂。在正常条件下，基本混合物已被证明在广泛的碳化钛添加剂中燃烧。离心力场的使用允许相分离极限从 17.5% 的碳化钛增加到 20%。在沉淀改性的情况下，该系统具有更大的燃烧和相分离潜力，合金的结构成分具有更小的尺寸和更精细的结构。我们提出了一系列涉及沉淀机制改性的化学反应，其中 Co ₃ O ₄分解和随后活性氧的释放起着关键作用。