Chemical-vapor deposition of wear resistant hard coatings in the Ti–B–C–N system: properties and metal-cutting tests

Author(s):  
H. Holzschuh
Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1680
Author(s):  
Matija Sakoman ◽  
Danko Ćorić ◽  
Mateja Šnajdar Musa

The plasma-assisted chemical vapor deposition (PACVD) technique has shown many advantages in applications, where thin coatings with superior wear properties are demanded, especially for geometrically complex parts. In this study, multilayered gradient TiBN coatings that were deposited on nanostructured cemented carbides by the PACVD method were investigated. Nanostructured samples of cemented carbides with the addition of 5 and 15 wt.% Co were sintered by the hot isostatic pressing, sinter-HIP technique. Surface preparation was conducted on samples in order to enable maximum coating adhesion. Tests that were conducted on produced samples aimed to investigate the mechanical and physical properties of coated samples. These tests included nanoindentation, surface layer characterization, and coating adhesion evaluation while using the Rockwell and scratch test. The obtained results confirmed that the PACVD process can be utilized for applying thin hard coatings to nanostructured cemented carbides that are produced by the sinter HIP process, resulting in a base material/ coating system that exhibits excellent physical and mechanical properties. The results presented in this paper give a valuable contribution to the research of TiBN coating systems and their potential for application under heavy wear conditions.


2011 ◽  
Vol 520 (2) ◽  
pp. 833-836 ◽  
Author(s):  
Mingdong Bao ◽  
Xuebo Xu ◽  
Haijun Zhang ◽  
Xiaoping Liu ◽  
Linhai Tian ◽  
...  

2020 ◽  
Vol 509 ◽  
pp. 144792
Author(s):  
Borislav Vasić ◽  
Uroš Ralević ◽  
Katarina Cvetanović Zobenica ◽  
Milče M. Smiljanić ◽  
Radoš Gajić ◽  
...  

2013 ◽  
Vol 199 ◽  
pp. 170-175 ◽  
Author(s):  
Tomasz Tański ◽  
Krzysztof Labisz ◽  
Krzysztof Lukaszkowicz

With the appliance of the development of modern technologies in the areas of surface engineering and related applications, the definition of the term hard coatings can be extended by the Plasma Assisted Chemical Vapor Deposition (PACVD) method. This is a cost-effective plasma deposition process, which can be used to improve surface layer properties, e.g. hardness and wear resistance of aluminium, but also magnesium alloy parts by creating a resistant thick coating on the component surface. In this paper there have been presented results of the structure and mechanical properties investigations of crystalline diamond-like carbon gradient/monolithic coatings (Ti/DLC/DLC) deposited onto magnesium alloy (Mg-Al) and aluminium alloy (Al-Si-Cu) substrate by Plasma Assisted Chemical Vapor Deposition (PACVD). A thin metallic layer (Ti) was deposited prior to deposition of gradient coatings to improve adhesion. Microstructure investigation was performed using scanning electron microscopy and transmission electron microscopy. Tests of the coatings adhesion to the substrate material were made using the scratch test. As an implication for the practice a new layer sequence can be possible to develop, based on PACVD technique. Wear test were performed using the ball-on-disk method.


2013 ◽  
Vol 7 (6) ◽  
pp. 720-725 ◽  
Author(s):  
Tsunehisa Suzuki ◽  
◽  
Mutsuto Kato ◽  
Yoshiki Shimizu ◽  

The atmospheric microplasma metal organic chemical vapor deposition (AP-MOCVD) using titanium (IV) tetraisopropoxide (TTIP) as a metal alkoxide titanium source was investigated for depositing TiC and TiN hard coatings on stainless steel rods for improving the tool life of electroplated diamond tools. The components and morphology of the coating deposited by microplasma AP-MOCVD with several gas sources and different processes was observed and analyzed. The titanium-based hard coatings composed of TiC, TiN, and TiO2 was successfully obtained by microplasma AP-MOCVD using TTIP as a metal alkoxide titanium source with mixed gases (CH4, N2, H2, and Ar). For the fabrication of titanium-based coatings (TiC, TiN) by microplasma AP-MOCVD, it is important that the carbon and oxygen content, which are components of TTIP, are reduced. The addition of hydrogen gas in the microplasma AP-MOCVD process, followed by nitriding effectively reduces the carbon and oxygen content in the coating.


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