Investigation of the Influence of Microdroplets on the Coatings Nanolayer Structure

Coatings

Nikolay Sitnikov¹  Jury Bublikov²  Alexey Vereschaka²  Nikolay Andreev³  Filipp Milovich³  Catherine Sotova⁴  Ilya Sadov⁴  Sergey Grigoriev⁴ 

[1] Department of Solid State Physics and Nanosystems, National Research Nuclear University MEPhI, 115409 Moscow, Russia;IDTI RAS, 127994 Moscow, Russia;Materials Science and Metallurgy Shared Use Research and Development Center, National University of Science and Technology MISiS, 119049 Moscow, Russia;VTO Department, Moscow State Technological University STANKIN, 127994 Moscow, Russia;

关键词: nanolayered PVD coating;    microdroplets;    crack formation;    tool wear;   

DOI  :  10.3390/coatings10121204

来源: DOAJ

【 摘 要 】

The paper presents the results of studies focused on the specific features typical for the formation of the shape and structure of microdroplets embedded into the structure of the Ti–TiN–(Ti,Cr,Mo,Al)N and Ti–TiN–(Ti,Al,Nb,Zr)N coatings during their deposition. Three main microdroplet shapes—a sphere, a tear, and a lens—have been considered. The specific features typical for the formation of secondary layered structures on the surface of some microdroplets have also been examined. As a result of the conducted investigations, with the use of scanning and transmission electron microscopy, the influence of microdroplets on the distortion of the nanolayer structure of the coatings was studied. A hypothesis has been proposed concerning a relationship between the microdroplet shape and the presence or absence of secondary structures and the microdroplet sizes and weight, as well as the conditions in the unit chamber during the movement of a microdroplet from a cathode to the deposition surface. Based on the study focused on the shape of the microdroplet core and the specific features typical for the formation of the secondary structure around it, a hypothesis has been proposed, according to which, for some microdroplets, it takes much more time than previously assumed for the movement from a cathode to the deposition surface.

【 授权许可】

Unknown