Combustion of 5Ti + 3Si Blends: Impact of Granule Diameter and Ti Particle Size

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2022-06-25 DOI:10.3103/S106138622202008X

B. S. Seplyarskii, R. A. Kochetkov, T. G. Lisina, N. I. Abzalov, D. S. Vasilyev

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Abstract

This work explains the different ratio of the burning velocities of powder and granulated 5Ti + 3Si mixtures with Ti particles 35 and 120 μm in size due to the influence of impurity gases, which depends on the conditions for heating up the particles ahead of the combustion front. For the first time, the burning velocity inside the granule was obtained using the measured combustion velocities of mixtures of different granule sizes 0.6 ≤ D ≤ 1.7 mm. It turned out to be equal to the velocity of the combustion front in the granulated mixture for fine Ti particles and the velocity of the combustion front in the powder mixture for coarse Ti particles. The difference in the burning rates of the substance of granule and powder mixture serves as a quantitative measure of the influence of impurity gases. The results confirmed the applicability of the developed conditions for heating up the powder components to predict the retarding effect of impurity gases on the synthesis velocity in 5Ti + 3Si powders.

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5Ti + 3Si共混物燃烧:颗粒直径和Ti粒度的影响

该研究解释了由于杂质气体的影响，35 μm和120 μm Ti颗粒的5Ti + 3Si粉末和颗粒混合物的燃烧速度比不同，这取决于燃烧前加热颗粒的条件。首次利用实测的0.6≤D≤1.7 mm不同粒径混合物的燃烧速度得到颗粒内的燃烧速度。结果表明，对于细钛颗粒，它等于颗粒状混合物中燃烧锋面的速度，对于粗钛颗粒，它等于粉末混合物中燃烧锋面的速度。颗粒和粉末混合物中物质燃烧速率的差异可作为杂质气体影响的定量度量。结果证实了所建立的粉末组分加热条件在预测杂质气体对5Ti + 3Si粉末合成速度的延缓作用方面的适用性。

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来源期刊

International Journal of Self-Propagating High-Temperature Synthesis MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

33.30%

发文量

期刊介绍： International Journal of Self-Propagating High-Temperature Synthesis is an international journal covering a wide range of topics concerned with self-propagating high-temperature synthesis (SHS), the process for the production of advanced materials based on solid-state combustion utilizing internally generated chemical energy. Subjects range from the fundamentals of SHS processes, chemistry and technology of SHS products and advanced materials to problems concerned with related fields, such as the kinetics and thermodynamics of high-temperature chemical reactions, combustion theory, macroscopic kinetics of nonisothermic processes, etc. The journal is intended to provide a wide-ranging exchange of research results and a better understanding of developmental and innovative trends in SHS science and applications.