1. B. Al-Zubaidy, N. S. Radhi, and Z. S. Al-Khafaji, Study the effect of thermal impact on the modelling of (titanium-titania) functionally graded materials by using finite element analysis, Int J Mech Eng Technol, (2019).
2. N. S. Radhi and Z. S. Al-Khafaji, Preparation and Investigation composite coating (Ni-nano hydroxyapatite) on low carbon steel samples.
3. N. S. Radhi, M. Marza, and Z. S. Al-Khafaji, Modification of Nickel-phosphor Electroless Coatings by adding particles of Zirconia, Solid State Technol, (2020).
4. N. M. Dawood, N. S. Radhi, and Z. S. Al-khafaji, Investigation Corrosion and Wear Behavior of Nickel-Nano Silicon Carbide on Stainless Steel 316L, (2020).
5. S. S. Radhi, Z. S. Al-khafaji, and M. W. Falah, Sustainable heating system by infrared radiators, (2022).