Indentation hardness evaluation of cathodic arc deposited thin hard coatings

Tuck, Jonathan R.; Korsunsky, Alexander M.; Bhat, Deepak; Bull, Steve

doi:10.1016/s0257-8972(00)01116-6

Cited by 80 publications

(68 citation statements)

References 11 publications

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“…Various ceramic or metallic hard thin coatings have been applied for preventing damage and improving the hardness properties of substrate (Navinsek et al, 1998;Tuck et al, 2001;Ahn and Kwon, 2000). For analyzing the enhancement of hardness, the interaction between the hard thin coating and the soft substrate needs to be clarified under different conditions.…”

Section: Resultsmentioning

confidence: 99%

“…For analyzing the enhancement of hardness, the interaction between the hard thin coating and the soft substrate needs to be clarified under different conditions. A work-of-indentation approach was extended to a general formula by Tuck et al (2001). The hardness of each constituent and coating thickness can be integrated and expressed by…”

Section: Resultsmentioning

confidence: 99%

“…Note that the experimental data used to fit the lines in Fig. 4 Hardness values are expected to increase as the thickness of similar coatings increases, and hence the coating plays a more important role in energy absorption during indentation (Korsunsky et al, 1998;Tuck et al, 2001).…”

Section: Resultsmentioning

confidence: 99%

“…The k value will also affect the relative contribution of the load carrying by the substrate and film. Based on the calculation of Tuck et al (2001), the hardness-β curves under a given X will shift to the right with increasing k value. This means that the film will carry a higher percentage of indented load, and the high to low hardness transition (or the deflection point in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The effect of different coating thicknesses was analyzed to explore the optimum coating thickness for hardening the substrate. According to the concept of Tuck et al (2001), a hardness model can be developed from several variables and extended into a generalized form. The enhancement achieved by TFMG coatings of different penetration depths can be evaluated and compared using an accurate hardness model.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Coating behavior and surface hardening of Pd77Cu6Si17 thin film metallic glass on AZ31 magnesium alloy

Chang

Pei

et al. 2013

J. Zhejiang Univ. Sci. A

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Pd 77 Cu 6 Si 17 (PCS) thin film metallic glasses (TFMGs) with high glass forming ability and hardness were selected as a hard coating for improving the surface hardness of AZ31 magnesium alloy. Both microindentation and nanoindentation tests were conducted on specimens with various PCS film thicknesses from 30 to 2000 nm. The apparent hardness and the relative indentation depth (β) were integrated using a quantitative model. The interaction parameters involved and relative hardness values were extracted from iterative calculations. According to the results, surface hardness can be enhanced greatly by PCS TFMGs in the shallow region, followed by gradual decrease with increasing β ratio. In addition, specimens with thinner coatings (e.g., 200 nm) showed greater substrate-film interaction and those with thick coatings (e.g., 2000 nm) became prone to film cracking. The optimum TFMG coating thickness in this study was estimated to be around 200 nm.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Coating behavior and surface hardening of Pd77Cu6Si17 thin film metallic glass on AZ31 magnesium alloy

Chang

Pei

et al. 2013

J. Zhejiang Univ. Sci. A

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Lafad‐Assisted Plasma Surface Engineering Processes for Wear and Corrosion Protection: A Review

Gorokhovsky¹

2010

Ceramic Engineering and Science Proceedings

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Mechanical and Tribological Properties of Epitaxial Cubic Boron Nitride Thin Films Grown on Diamond

et al. 2008

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Cubic boron nitride (c-BN) is a very promising material with respect to applications as a hard coating for cutting tools due to its many desirable properties including a hardness second only to diamond, oxidation resistance and chemical inertness against iron even at high temperatures with the latter property resulting in the ability to machine ferrous metals. However, these potential applications are hindered by the bad adhesion of c-BN films to most substrate materials. This tendency of c-BN films to delaminate also puts significant obstacles to accurate measurements of their mechanical properties. The poor adhesion of such samples is recognized as being due to the high compressive stress caused by energetic ion bombardment during growth and to a mechanically soft turbostratic boron nitride (t-BN) interlayer between c-BN and substrates. [1] Up to now, most of the c-BN films consist of nano-sized crystallites and have the above addressed layered structure. Thus, the elastic and mechanical properties, which have been studied with different methods, [2][3][4] are certainly not representative for c-BN alone. Recently, by introducing fluorine into the gas phase, thick polycrystalline c-BN films were synthesized by jet-plasma chemical vapor deposition (CVD) and microwave-plasma CVD [5,6] with a submicron lateral grain size and a nanoindentation study on these c-BN films was reported. [6][7][8] However, a 100 nm thick t-BN interlayer and the large number of grain boundaries still exist in these c-BN films. [7,8] Furthermore, in most cases sample polishing is required prior to hardness measurements since these c-BN films are considerably rough. [8] Very recently, we have demonstrated that thick heteroepitaxial c-BN films without any intermediate t-BN layer can be prepared on CVD diamond films and single crystal diamond substrates using ion beam assisted deposition (IBAD). [9,10] These thick, and single crystalline c-BN films possess very smooth surfaces that allowed to accurately determine their mechanical behavior as expressed by Young's modulus [11] and hardness.Scratch tests have been widely used as a convenient method for estimating adhesion of thin hard wear-resistant coatings such as titanium nitride (TiN), diamond-like carbon (DLC) and c-BN to substrates. [12][13][14][15][16][17][18] In the traditional scratch test procedure a diamond tip is drawn across the coating surface under a progressively increasing normal load until the coating becomes detached or fractured. The smallest load at which any recognisible failure occurs is called the "critical load" L c . However, the relationship between this critical load and the adhesive strength of the interface between the substrate and coating is yet unclear. In addition to the coatingsubstrate bond strength itself, a wide range of factors are known to affect the critical load value obtained from the scratch test. [19][20][21][22][23][24][25][26][27] The aim of this work was to show the relative improvement of the mechanical and tribological properties of the c-BN film...

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Indentation hardness evaluation of cathodic arc deposited thin hard coatings

Cited by 80 publications

References 11 publications

Coating behavior and surface hardening of Pd77Cu6Si17 thin film metallic glass on AZ31 magnesium alloy

Coating behavior and surface hardening of Pd77Cu6Si17 thin film metallic glass on AZ31 magnesium alloy

Lafad‐Assisted Plasma Surface Engineering Processes for Wear and Corrosion Protection: A Review

Mechanical and Tribological Properties of Epitaxial Cubic Boron Nitride Thin Films Grown on Diamond

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