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The effect of detonation spraying on the phase composition and hardness of Al2O3 coatings

https://doi.org/10.29317/ejpfm.2020040207

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Abstract

The article were studied the e ect of detonation spraying on the structure and properties of Al 2 O 3 coatings. It was determined that reducing the delay time between shots is leading to increase the hardness and elastic module of Al 2 O 3 coatings. It was found on the basis of X-ray di raction analysis that the main reason for the increasing in hardness with a decreasing in the delay time between shots is associated with increasing in the volume fraction of α -Al 2 O 3 phase. The studies of X-ray di raction presented that the highest content of the phase is achieved when the coatings are formed with a delay time between shots of 0.25 s. It was found that increasing in the volume fraction of the α -Al2O3 phase is caused by the secondary recrystallization γ → α , which occurs due to the heating of particles during coating formation, i.e. due to increasing in temperature above 1100 ◦ C in single spots of the coating when they are put each other.

About the Authors

B. K. Rakhadilov
S. Amanzholov East Kazakhstan State University; Limited partnership «PlasmaScience»
Kazakhstan


D. B. Buytkenov
S. Amanzholov East Kazakhstan State University
Kazakhstan


D. .. Kakimzhanov
S. Amanzholov East Kazakhstan State University
Kazakhstan


R. S. Kozhanova
Limited partnership «PlasmaScience»
Kazakhstan


G. S. Bektasova
S. Amanzholov East Kazakhstan State University
Kazakhstan


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For citation:


Rakhadilov B.K., Buytkenov D.B., Kakimzhanov D..., Kozhanova R.S., Bektasova G.S. The effect of detonation spraying on the phase composition and hardness of Al2O3 coatings. Eurasian Journal of Physics and Functional Materials. 2020;4(2):160-166. https://doi.org/10.29317/ejpfm.2020040207

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ISSN 2522-9869 (Print)
ISSN 2616-8537 (Online)