- Research on the fabrication of TiN coatings on biomedical titanium alloy by using magnetron sputtering or arc-PVD methods.
- Enhancement of the properties of TiN coatings on titanium alloy substrates through ultrasonic treatment.
- Mastery of the technology for depositing TiN coatings on titanium alloy, towards orthopedic applications.
- Enhencement of collaboration capabilities of the Institute of Materials Science with the Institute of Technical Acoustics, National Academy of Sciences of Belarus, and research centers in Belarus.

TiN coatings on the biomedical titanium alloy Ti6Al4V have been successfully deposited by the magnetron sputtering method, with the following findings:
+ The influence of sputtering power on properties of TiN coatings has been studied. The results indicated that the TiN coatings have a single-phase with face-centered cubic structure. SEM showed columnar crystal structures, and particle size, along with the deposition rate, increased as the sputtering power increased. Additionally, the hardness of the coatings reached a maximum value (22.8 GPa ± 1.2 GPa) at a sputtering power of 250 W, with the lowest friction coefficient (0.42) at a sputtering power of 150 W.
+ The effect of nitrogen gas flow rate on the structure and properties of TiN coatings has been investigated. As the nitrogen gas flow rate increased from 10 to 30 sccm, the intensity of the (111) peak of TiN coatings gradually increased, while the shape of the sputtered particles changed from a multi-faceted structure to a spherical one. At a nitrogen gas flow rate of 25 sccm, the TiN coatings exhibited a fine particle (~60 nm) and maximum hardness (24.8 ± 1.8 GPa). The adhesion strength of TiN coatings at different nitrogen gas flow rates exceeded 30 N. Furthermore, electrochemical corrosion measurements indicated that the coatings deposited at the N2 gas flow rate of 25 sccm, have the best corrosion resistance and improved the surface properties of the Ti6Al4V biomedical titanium alloy. 

- The optimal power and nitrogen gas flow rate for TiN coaitngs on biomedical titanium alloy deposited by magnetron sputtering have been determined.
- Explain change in hardness, wear resistance, and corrosion resistance through the investigation of the coating's structure.
- TiN coatings exhibit potential applications in enhancing the surface properties of biomedical titanium alloys.

- Publications:
+ 01 article published in the journal under ISI list: Luong V D, Doan D P, Nguyen N L, Nguyen Q T, Dang Q K, Rubanik V, Rubanik V Jr, Bahrets D, Impact of reactive nitrogen flow on morphology, mechanical properties, and biocorrosion behavior of sputtered TiN coatings towards orthopedic applications Surface Topography: Metrology and Properties. 11 (2023) 035002. (IF: 2.7, Q2)
+ 01 article published in domestic journal: Lương Văn Đương, Nguyễn Quốc Thịnh, Nguyễn Ngọc Linh, Đoàn Đình Phương, et. al. Nghiên cứu ảnh hưởng của công suất phún xạ đến tính chất của màng TiN chế tạo bằng phương pháp phún xạ magnetron, Tạp chí Khoa học công nghệ kim loại. 105 (T12/2022) 2-9.
- Patents:
- Products (description...):
+ 05 TiN coating samples deposited on Ti6Al4V biomedical titanium alloy.
- Other products:
+ Participating in training for 01 master student.

From the research results above, it is evident that titanium nitride coatings can enhance the surface properties of biomedical titanium alloys for applications as implant materials in the field of orthopedic. However, further studies are needed, especially conducting research on biological compatibility in simulated body fluid or on animals to assess the level of compatibility for practical applications. Therefore, our research team suggests considering the continuation of this research direction.