Structure and Properties of Diffusion Titanium Coatings Based on Hard Alloys
| Authors | A. Dehula, N. Kharchenko , T. Hovorun , V. Sitnikov, V. Hryb, D. Pakhnenko |
| Affiliations |
Sumy State University, 40007 Sumy, Ukraine |
| Е-mail | hovorun@pmtkm.sumdu.edu.ua |
| Issue | Volume 17, Year 2025, Number 6 |
| Dates | Received 02 October 2025; revised manuscript received 16 December 2025; published online 19 December 2025 |
| Citation | A. Dehula, N. Kharchenko, T. Hovorun, et al., J. Nano- Electron. Phys. 17 No 6, 06008 (2025) |
| DOI | https://doi.org/10.21272/jnep.17(6).06008 |
| PACS Number(s) | 81.10. – h, 81.10.Dn, 61.43.Bn, 61.50.Ks, 81.30.Hd |
| Keywords | Layer (38) , Diffusion coating, Carbide (15) , Microhardness . |
| Annotation |
This study presents the results of experimental investigations into the structure, phase composition, and microhardness of diffusion titanium coatings formed on the surface of hard alloys by diffusion metallization. The titanizing process was carried out in a specially designed reaction chamber at 1050°C for 2 – 3 hours under reduced pressure of the active gas phase in a closed system. Technically pure titanium powder, a carbon-containing additive, and carbon tetrachloride (CCl₄) as an activator were used as the initial components. The obtained coatings exhibited a multilayer structure consisting of titanium carbide (TiC) and intermetallic compounds of the CoTi type. The effects of temperature–time parameters and carbon content on the coating thickness, phase composition, and microhardness were systematically analyzed. It was found that under optimal titanizing conditions, a TiC layer 4.0 – 5.0 m thick with a microhardness of up to 34.0 GPa is formed, resulting in a significant improvement in the wear resistance of hard alloy tools. The findings of this study can contribute to the advancement of diffusion carbide coating technologies for applications in mechanical engineering and tool manufacturing. |
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