The role of PECVD hard coatings on the performance of industrial tools

The advantages of the application of hard coatings, which are well knownfor cutting tools, are to a much lesser extent explored for casting, extrusion, molding and forming tools. Increasing the lifetime of these tools is an important task in surface engineering because of complex loading conditionsand often complicated tool geometry. The plasma-enhanced chemical vapor deposition (PECVD) technique is well suited to deposit hard coatings onto large dies and moulds. The aim of this study was to discuss deposition processes suitable for coating of the often large three-dimensional molds and dies used in metal forming. Furthermore, results obtained using different hard coatings in industrial applications for several case studies like aluminum pressure die-casting; plastics injection molding and sheet metal forming are presented and discussed. For best coating performance, a careful optimization of both substrate pretreatment and coating deposition is necessary. The plasma-enhanced chemical vapor deposition (PECVD) technique shows advantages for these applications because of the high flexibility in pre-treatment using chemical etching and plasma-nitriding, because of its ability to coat large complexly shaped tools and because of the possibility of deposition of low-chlorine containing low-friction coatings.

Download Full-text

Structure and Properties of Diamond-Like Carbon Coatings Deposited on Non-Ferrous Alloys Substrate

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.199.170 ◽

2013 ◽

Vol 199 ◽

pp. 170-175 ◽

Cited By ~ 10

Author(s):

Tomasz Tański ◽

Krzysztof Labisz ◽

Krzysztof Lukaszkowicz

Keyword(s):

Electron Microscopy ◽

Chemical Vapor Deposition ◽

Magnesium Alloy ◽

Vapor Deposition ◽

Surface Engineering ◽

Plasma Deposition ◽

Chemical Vapor ◽

Wear Test ◽

Hard Coatings ◽

Diamond Like Carbon

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.

Download Full-text

Deposition of TiN, TiC, and DLC Coatings by PACVD

Production, Properties, and Applications of High Temperature Coatings - Advances in Chemical and Materials Engineering ◽

10.4018/978-1-5225-4194-3.ch014 ◽

2018 ◽

pp. 381-402

Author(s):

Mahboobeh Azadi

Keyword(s):

Vapor Deposition ◽

Materials Science ◽

Chemical Vapor ◽

Industrial Applications ◽

Hard Coatings ◽

Diamond Like Carbon ◽

Functional Coatings ◽

Dlc Coatings ◽

Medical Instruments ◽

Source Of Information

In this chapter, the author studied about titanium nitride (TiN), titanium carbide (TiC), diamond like carbon (DLC) single and multilayer coatings that utilize in harsh environments. These hard coatings were usually produced by the plasma assisted chemical vapor deposition (PACVD) method as a modern technique. PACVD is used to deposit thin coatings for different usages such as computer disc drives, automobile and aerospace parts, surgical/medical instruments and the food industry. The author tried to delineate the state of the performance of different coating systems and layer characteristics that suitable either for laboratory -scales or industrial applications. Mechanical features of these coatings contain the hardness, the toughness, the wear resistance and structural properties that were perused. Consequently, this chapter offers a source of information for those who want to familiarize with the knowledge in the area of materials science of functional coatings that was produced by new plasma-based technologies.

Download Full-text

Marine Antibiofouling Properties of TiO2 and Ti-Cu-O Films Deposited by Aerosol-Assisted Chemical Vapor Deposition

Coatings ◽

10.3390/coatings10080779 ◽

2020 ◽

Vol 10 (8) ◽

pp. 779

Author(s):

Caroline Villardi de Oliveira ◽

Julie Petitbois ◽

Fabienne Faÿ ◽

Frédéric Sanchette ◽

Frédéric Schuster ◽

...

Keyword(s):

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Anatase Phase ◽

Field Tests ◽

Chemical Vapor ◽

Industrial Applications ◽

Pure Tio2 ◽

In Vitro Tests ◽

Tio2 Films

The actual interest in developing light-induced catalytic coatings to act as an antibiofouling alternative has recently prompted interest in the incorporation of Cu into TiO2 films, working as a visible light sensitizer catalyst. TiO2 and new Ti-Cu-O films with Cu contents ranging between 16% and 75% Cu/(Cu + Ti) are deposited by aerosol-assisted metalorganic chemical vapor deposition at a substrate temperature of 550 °C. The films are composed of TiO2 anatase phase, mixed with Cu2O when including Cu in the composition. Pure TiO2 films’ morphologies are characterized by the formation of microflower-like structures with nanometric petals, which induce a high specific surface. These features are not present in Ti-Cu-O films. A UV-Visible study revealed that the optical band gap energy decreases with increasing Cu content. Interestingly, Ti-Cu-O films presented a highly photo-catalytic activity in the orange-G degradation. Marine biofouling field tests in Lorient’s Harbor in France and in vitro tests were carried out in order to evaluate the antifouling performance of the films, revealing that topography and chemical composition can act differently on different species. Field tests revealed that TiO2 microflowers reduced the fouling coverage. Besides, Ti-Cu-O films with 16 at.% Cu presented lower fouling coverage than films containing 58 at.% Cu. In vitro tests using two diatoms (P. tricornutum and N. perminuta) showed that the spaces between microflowers play a significant role in the adhesion of diatoms: microalgae adhere less when spaces are bigger than their cells, compared to when spaces are of the same size as cells. Films containing Cu did not alter N. perminuta growth nor adhesion, while they affected P. tricornutum by lowering its growth rate and adhesion without noticeable toxicity. Indeed, Cu-Ti-O is a very promising non-toxic fouling release film for marine and industrial applications.

Download Full-text

Plasma-Assisted Chemical Vapor Deposition of TiBN Coatings on Nanostructured Cemented WC-Co

Metals ◽

10.3390/met10121680 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1680

Author(s):

Matija Sakoman ◽

Danko Ćorić ◽

Mateja Šnajdar Musa

Keyword(s):

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Hot Isostatic Pressing ◽

Base Material ◽

Surface Preparation ◽

Chemical Vapor ◽

Hard Coatings ◽

Cemented Carbides ◽

Wear Properties ◽

Coating Adhesion

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.

Download Full-text