Factors affecting growth defect formation in cathodic arc evaporated coatings

Aharonov, R.; Chhowalla, Manish; Dhar, Suranjeeta; Fontana, Raymond P.

doi:10.1016/0257-8972(95)02773-4

Cited by 50 publications

(25 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These nodules, having the same composition as the bulk coating, are growth defects' formed mainly on the metal-rich droplets from the cathode arc spot during coating deposition. The droplets land on the substrate and act as prefened nucleation sites for the coating, thus, causing the droplet region of the coating to grow at a faster rate than the bulk and produce a shadowing effect on the adjacent areas [20]. Some of the nodular particles detach from the coating, leaving craters on the coating surface.…”

Section: Resultsmentioning

confidence: 98%

Tribological Behaviors of Titanium Nitride- and Chromium-Nitride-Based Physical Vapor Deposition Coating Systems

Cai

Huang

Yang

et al. 2012

Journal of Engineering for Gas Turbines and Power

View full text Add to dashboard Cite

This sttidy investigates the effects of the deposition process and coating composition on microstructural and tribological properties of TiN-and CrN-based coating systems. Coatings were produced using various PVD-based processes-electron beam (EB), cathodic arc (CA), and plasma enhanced magnetron sputtering (PEMS). All coated samples were evaluated for their composition, microstructure, and surface morphology. Coating mechanical properties such as hardness. Young's modulus, and coefficient of friction were also studied and related to their microstructures, wear, and erosion resistances. It was found that hardness (H), Young's modulus (E), and coefficient of friction had impact on both wear and erosion rates. In particular, the H^IE^ ratio was inversely proportional to the specific wear rate. For erosion behavior, higher H^IE^ ratios relate to lower erosion rates at low impingement angles, whereas higher H^IE^ ratios relate to higher erosion rates at high impingement angles.

show abstract

Section: Resultsmentioning

confidence: 98%

Tribological Behaviors of Titanium Nitride- and Chromium-Nitride-Based Physical Vapor Deposition Coating Systems

Cai

Huang

Yang

et al. 2012

Journal of Engineering for Gas Turbines and Power

View full text Add to dashboard Cite

show abstract

“…The growth defects can also be reduced by increasing substrate bias to achieve better coverage of surface imperfections because of the increase in the adatom mobility and thus surface diffusion. 21 However, in the industrial environment where hard coatings are produced, totally eliminating growth defects in coatings are impossible.…”

Section: Resultsmentioning

confidence: 99%

Alleviating detrimental effects of defects on corrosion performance of TiN coating by post-deposition treatment using polymethyl methacrylate

Cai¹,

Yang²,

Huang³

et al. 2008

Surface Engineering

View full text Add to dashboard Cite

Coating defects provide an access channel for corrosive medium to penetrate and reach underlying metal substrate, therefore promoting localised corrosion. In this paper, a polymethyl methacrylate (PMMA) sealing technique was developed and applied to a TiN coating deposited by plasma assisted electron beam evaporation method. The as deposited and PMMA treated coating specimens were subjected to potentiodynamic polarisation measurements in 3?5%NaCl aqueous solution. The coating degradation with immersion time was evaluated at open circuit potential using electrochemical impedance technique. The test results indicate that PMMA postdeposition treatment successfully seals the pores, and therefore significantly improves the corrosion resistance of the coating. Additionally no obvious degradation has been observed for the PMMA treated samples during the long time exposure to the NaCl solution.

show abstract

“…In a coating/metal-substrate system, the metal substrate is not directly in contact with the corrosion environment. However corrosions may still occur due to defects in the coatings such as voids, pinholes, droplet, poor adhesion, differences of chemical composition between the coating matrix and droplet [32,33,132,133], as summarized in Figure 2-11.…”

Section: Corrosion Of Coating Systemsmentioning

confidence: 99%

“…A disadvantage of the CA-PVD technique is that it exhibits higher roughness compared to sputtering and electron-beam depositing techniques [32]. In a cathodic arc vaporization process, part of the material is ejected in the form of molten globules.…”

Section: Cathodicarc Processmentioning

confidence: 99%

“…Physically cleaning substrates and deposition chambers, and optimizing deposition parameters would minimize the source of droplets, therefore lower the rate of growth defects. In PVD processes, droplets can be generated due to cathode arcing [32,111], molten vapor condensation [32,111,354,355], and preferential nucleation caused by surface irregularities or inhomogeneities [32] (Figure 2-58). These defect formations and growths are affected by deposition parameters, including bias voltage and duty cycle [32].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Tribological and electrochemical corrosion behaviours of titanium nitride and chromium nitride based PVD coating systems

Feng¹

View full text Add to dashboard Cite

Factors affecting growth defect formation in cathodic arc evaporated coatings

Cited by 50 publications

References 14 publications

Tribological Behaviors of Titanium Nitride- and Chromium-Nitride-Based Physical Vapor Deposition Coating Systems

Tribological Behaviors of Titanium Nitride- and Chromium-Nitride-Based Physical Vapor Deposition Coating Systems

Alleviating detrimental effects of defects on corrosion performance of TiN coating by post-deposition treatment using polymethyl methacrylate

Tribological and electrochemical corrosion behaviours of titanium nitride and chromium nitride based PVD coating systems

Contact Info

Product

Resources

About