Steam Oxidation Behavior of ZrO2/Cr-coated Pure Zirconium Prepared by Plasma Electrolytic Oxidation Followed by Filtered Cathodic Vacuum Arc Deposition

This article studies the specific features of cathode vacuum arc deposition of coatings used in the production of cutting tools. The detailed analysis of the major drawbacks of arc-Physical Vapour Deposition (PVD) methods has contributed to the development of the processes of filtered cathodic vacuum arc deposition to form nanoscale multilayered composite coatings of increased efficiency. This is achieved through the formation of nanostructure, increase in strength of adhesion of coating to substrate up to 20%, and reduction of such dangerous coating surface defects as macro- and microdroplets up to 80%. This article presents the results of the studies of various properties of developed nanoscale multilayered composite coating. The certification tests of carbide tool equipped with cutting inserts with developed nanoscale multilayered composite coating compositions in longitudinal turning (continuous cutting) and end symmetric milling, and intermittent cutting of steel C45 and hard-to-cut nickel alloy of NiCr20TiAl showed advantages of tool with nanoscale multilayered composite coating as compared to the tool without coating. The lifetime of the carbide inserts with developed NMCC based on the system of Ti–TiN–(NbZrTiCr)N (filtered cathodic vacuum arc deposition) was increased up to 5–6 times in comparison with the control tools without coatings and up to 1.5–2.0 times in comparison with nanoscale multilayered composite coating based on the system of Ti–TiN–(NbZrTiCr)N (standard arc-PVD technology).

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The composition, microstructure and mechanical properties of Ni/DLC nanocomposite films by filtered cathodic vacuum arc deposition

Diamond and Related Materials ◽

10.1016/j.diamond.2017.02.012 ◽

2017 ◽

Vol 75 ◽

pp. 96-104 ◽

Cited By ~ 12

Author(s):

Han Zhou ◽

Qingyan Hou ◽

Tianqing Xiao ◽

Yudong Wang ◽

Bin Liao ◽

...

Keyword(s):

Mechanical Properties ◽

Nanocomposite Films ◽

Vacuum Arc ◽

Microstructure And Mechanical Properties ◽

Vacuum Arc Deposition ◽

Filtered Cathodic Vacuum Arc ◽

Arc Deposition

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Plasma Electrolytic Oxidation on Ti–xNb–2Ag–2Pt Alloys for Nano- and Micro-Pore Formation in Electrolyte with Ca and P Ions for Dental Implant Use

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19163 ◽

2021 ◽

Vol 21 (7) ◽

pp. 3753-3758

Author(s):

Hyun-Jun Kim ◽

Han-Cheol Choe

Keyword(s):

Dental Implant ◽

Plasma Electrolytic Oxidation ◽

Pore Formation ◽

Melting Furnace ◽

Vacuum Arc ◽

X Ray ◽

Arc Melting ◽

Electrolytic Oxidation ◽

Nb Content ◽

Plasma Electrolytic

In this study, plasma electrolytic oxidation (PEO) on Ti–xNb–2Ag–2Pt alloys for nano- and micro-pore formation in electrolyte with Ca and P ions for dental implant use was studied using various experimental equipment. The Ti–xNb–2Ag–2Pt alloys were fabricated using a vacuum arc melting furnace, and micro-pores were created through PEO-treatment in an electrolyte containing Ca and P ions. The PEO-treated surface was observed by X-ray diffractometer (XRD), field-emission scanning electron microscopy, and energy dispersive X-ray spectroscopy (EDS). The microstructure of Ti– xNb–2Ag–2Pt alloys showed the transformation of needle-like structure to equiaxed structure, as Nb content increased. Adding small amounts of Ag and Pt to Ti–xNb alloys, microstructure was not observed the significantly difference compared to Ti–xNb. The nano- and micro-pore sizes increased as the Nb content increased after PEO-treatment of Ti-xNb. In the case of Ti–50Nb–2Ag–2Pt, groove structure was observed, also the Ca/P ratio increased as the Nb content increased. The oxide layer thickness of Ti–xNb–2Ag–2Pt alloys was increased, as the Nb content increased.

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