Analysing the adhesion strength of Mo-WC-Cu-Si composite coated layer by using the scratch test

2021 ◽  
Author(s):  
S.V.V.N. Siva Rao ◽  
Tharra Bhavani ◽  
Subrata Kumar Ghosh ◽  
John Deb Barma ◽  
Raj Kumar Bogendro Meitei
Keyword(s):  
Adhesion Strength ◽  
Scratch Test ◽  
Coated Layer

The Correlation of Adhesion Strength with Barrier Structure in Cu Metallization

2003 ◽  
Vol 766 ◽  
Author(s):  
A. Sekiguchi ◽  
J. Koike ◽  
K. Ueoka ◽  
J. Ye ◽  
H. Okamura ◽  
...  
Keyword(s):  
Thin Films ◽  
Adhesion Strength ◽  
Nitrogen Concentration ◽  
Scratch Test ◽  
Barrier Structure ◽  
Barrier Layers ◽  
Cu Metallization ◽  
Microstructure Observation ◽  
Sputter Deposited ◽  
Sulfur Containing

AbstractAdhesion strength in sputter-deposited Cu thin films on various types of barrier layers was investigated by scratch test. The barrier layers were Ta1-xNx with varied nitrogen concentration of 0, 0.2, 0.3, and 0.5. Microstructure observation by TEM indicated that each layer consists of mixed phases of β;-Ta, bcc-TaN0.1, hexagonal-TaN, and fcc-TaN, depending on the nitrogen concentration. A sulfur- containing amorphous phase was also present discontinuously at the Cu/barrier interfaces in all samples. Scratch test showed that delamination occurred at the Cu/barrier interface and that the overall adhesion strength increased with increasing the nitrogen concentration. A good correlation was found between the measured adhesion strength and the composing phases in the barrier layer.

Effect of carburizing and annealing processes in improving the Ni/WC–Co adhesion strength

2017 ◽  
Vol 232 (3) ◽  
pp. 338-348 ◽  
Author(s):  
AW Hassan ◽  
MY Noordin ◽  
S Izman ◽  
K Denni
Keyword(s):  
Heat Treatment ◽  
Adhesion Strength ◽  
Positive Impact ◽  
Process Condition ◽  
Scratch Test ◽  
Process Conditions ◽  
X Ray ◽  
Treatment Processes ◽  
Before And After ◽  
Field Emission Electron Microscopy

Heat treatment processes have a positive impact in improving the adhesion strength of different interlayer/substrate materials. However, information regarding the effect of these processes in enhancing the adhesion strength of an electroplated nickel interlayer on tungsten carbide substrate for diamond deposition is lacking. In this study, the effect of carburizing and annealing process conditions in enhancing the adhesion strength of the electroplated nickel interlayer was investigated. The heat treatment processes were designed and modeled by the design of experiments technique. The heat-treated specimens were characterized by the field-emission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction techniques. The adhesion of the interlayer before and after the heat treatment was assessed by the scratch test. The results show that the adhesion of the electroplated nickel interlayer was remarkably improved by both processes. The mathematical models for predicting the adhesion strength of the carburized and annealed nickel interlayer within the specified ranges were developed. The maximum adhesion strength of 30 N was obtained from the nickel interlayer annealed at the highest process condition of temperature and time.

Effects of Combined Surface Modification on Adhesion Strength of CrN Coatings for STS420

2010 ◽  
Vol 297-301 ◽  
pp. 1334-1339
Author(s):  
G.C. Jeong ◽  
H.J. Choi ◽  
Yong Ho Sohn ◽  
S.I. Kwun
Keyword(s):  
Surface Modification ◽  
Adhesion Strength ◽  
Intermediate Layer ◽  
Scratch Test ◽  
X Ray Diffraction ◽  
Ion Nitriding ◽  
Transmission Electron ◽  
Nitrogen Ion ◽  
And Performance ◽  
Crn Coatings

In order to improve the durability and performance of molds and tools, diverse methods of surface modification are used where the adhesion strength between a substrate and coating plays an important role. To improve adhesion strength, a combined surface modification method is often utilized. In this study, adhesion strength and microstructure of various combined surface modifications (i.e., ion-nitriding, Cr intermediate layer, CrN layer and nitrogen ion- implantation) were examined on STS420. Phase constituents, microstructure, adhesion strength and hardness of coating-substrate system with combined surface modification were examined by using optical microscopy, X-ray diffraction, transmission electron microscopy, scratch test, and nano-indentation. The highest adhesion strength was observed when CrN coating was formed by nitrogen implantation on ion-nitrided substrate with a Cr-intermediate layer. Influence of processing sequence and combination is related to microstructural observations and adhesion strength.

562 Finite element analysis on influence of interface asperity on adhesion strength in scratch test

2011 ◽  
Vol 2011.60 (0) ◽  
pp. _562-1_-_562-2_
Author(s):  
Keita KOYABU ◽  
Kunio HAYAKAWA ◽  
Hiroyuki Mori ◽  
Tamotsu NAKAMURA ◽  
Shigekazu TANAKA
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Adhesion Strength ◽  
Scratch Test ◽  
Element Analysis

Adhesion Assessment of BNT Films on Titanium Substrates Using a Scratch Test

2014 ◽  
Vol 875-877 ◽  
pp. 584-587
Author(s):  
Fang Chao Xu ◽  
Kazuhiro Kusukawa
Keyword(s):  
Hydrothermal Method ◽  
Adhesion Strength ◽  
Substrate Surface ◽  
Pure Titanium ◽  
Scratch Test ◽  
Film Deposition ◽  
Lead Free ◽  
Test Results ◽  
Scratch Tests ◽  
Titanium Substrates

Lead-free piezoelectric (Bi1/2Na1/2)TiO3(BNT) films were deposited on 0.2 mm thick pure titanium (Ti) substrates by a hydrothermal method. Scratch tests were performed to quantitatively assess the adhesion strength between BNT films and Ti substrates. Ti substrates were pretreated by chemical polish and mechanical polish respectively prior to BNT film deposition with a view of investigating the effects of substrate surface pretreatments on the adhesion of BNT film. In the scratch test, the behaviour of BNT film exfoliation was investigated by SEM observation. The scratch test results revealed that the chemical polish pretreatment effectively improved the adhesion of BNT films.

scholarly journals Effect of sp3 Content on Adhesion and Tribological Properties of Non-Hydrogenated DLC Films

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1911 ◽  
Author(s):  
Chao Li ◽  
Lei Huang ◽  
Juntang Yuan
Keyword(s):  
Friction Coefficient ◽  
Magnetron Sputtering ◽  
Adhesion Strength ◽  
Bias Voltage ◽  
Tribological Properties ◽  
Scratch Test ◽  
Graphite Target ◽  
Transfer Layer ◽  
Xps Spectra ◽  
Pure Graphite

Non-hydrogenated diamond-like carbon (DLC) films with various ratios of sp3/sp2 were prepared on cemented carbide YG8 with DC magnetron sputtering technology. A pure graphite target was selected as the carbon source. Before DLC deposition, a surface etching pretreatment was carried out by mid-frequency magnetron sputtering method, using Ti atoms to improve adhesion strength. The ratios of sp3/sp2 were adjusted by bias voltages. In order to investigate the effect of the ratio of sp3/sp2 on adhesion and tribological properties, Raman spectra, XPS spectra, adhesion scratch test and ball-on-disk dry friction tests were applied. The results indicated that the ratio of sp3/sp2 fluctuated with bias voltage, increasing in the range of 0.74 to 0.98. The adhesion strength decreased from 31.5 to 18.4 N with the increasing ratio of sp3/sp2, while the friction coefficient rose in DLC-Si3N4 and dropped in DLC-Ti6Al4V. For DLC-Ti6Al4V, the oxidation of Ti6Al4V had a greater influence than graphitization of DLC. The hard oxides of Ti6Al4V broke the graphite transfer layer leading to a high friction coefficient. The wear rate was approximately linearly related to bias voltage. The coefficients of the linear regression equation were influenced by different friction materials. The adhesion strength and the friction coefficient were fitted as a function of the ratio of sp3/sp2.

Grain Size and Adhesion Strength of the V8C7 Coatings Produced In Situ

2017 ◽  
Vol 898 ◽  
pp. 1381-1387
Author(s):  
Xin Wang ◽  
Li Sheng Zhong ◽  
Xi Zhang ◽  
Yun Hua Xu ◽  
Hong Wu ◽  
...  
Keyword(s):  
Adhesion Strength ◽  
Vanadium Carbide ◽  
Gray Cast Iron ◽  
Raw Materials ◽  
Average Diameter ◽  
Scratch Test ◽  
X Ray Diffraction ◽  
X Ray ◽  
Excellent Adhesion

The vanadium carbide (V8C7) coating was fabricated by in situ reaction which used gray cast iron and vanadium plate as raw materials providing carbon and vanadium sources, respectively. The microstructure, phases, and adhesion strength of V8C7 coating were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD) and a single scratch test. The XRD results showed that the coating consisted of V8C7 and α-Fe, with the peaks of (222), (400), (440), (622) and (444) of V8C7 phase were confirmed. Moreover, the average diameter (D) of the V8C7 particles in the range of 432~582nm was calculated on the basis of the Scherrer and Halder-Wagner equations. The critical load of interface between V8C7 and substrate was 98.3 N, which implied that the interface of V8C7 coating /substrate had excellent adhesion strength.

The Adhesion Evaluation of Thin Hard Coatings on Tool Steel with Nitride or Non-Nitride Layer Using the Scratch Test

2008 ◽  
Vol 569 ◽  
pp. 165-168 ◽  
Author(s):  
Chan Joo Lee ◽  
Jung Min Lee ◽  
Byung Min Kim
Keyword(s):  
Acoustic Emission ◽  
Critical Load ◽  
Adhesion Strength ◽  
Tool Steel ◽  
Scratch Test ◽  
Optical Microscope ◽  
Nitride Layer ◽  
Hard Coatings ◽  
Work Of Adhesion ◽  
Scratch Track

The deposition of thin hard coating onto tool steel is done to improve the surface properties such as wear, corrosion. The adhesion strength between substrate and coating is one of important parameters in practical applications since coating failure affects the lifetime of tool directly. Scratch test with acoustic emission(AE) technique was performed to evaluate the adhesion strength qualitative by observing the friction load vs. the normal load curves, the acoustic emission signal generated by the damage of coatings and the scratch track using an optical microscope. In this study, the effect of substrate hardness on the adhesion strength was investigated by evaluating critical load and work of adhesion and observing AE signal and failure mode in scratch track using optical microscope. Coatings were individually deposited on six substrates by means of physical or chemical vapor deposition(PVD, CVD) process and TD process. The critical load of the substrates with nitride layer is higher than without nitride. Although high load causes higher stresses which make flaking occur in the coating-substrate interface, the work of adhesion of harder substrates is also high. Because harder substrates have small contact area causing lower the plastic deformation around stylus.

Analyses of Adhesion Strength for DLC Coating-Silicon Structure

2012 ◽  
Vol 197 ◽  
pp. 717-721
Author(s):  
Jun Zhang ◽  
Bin He ◽  
Xin Li Wei ◽  
Zhen Wei Yuan
Keyword(s):  
Numerical Simulations ◽  
Adhesion Strength ◽  
Fem Simulation ◽  
Scratch Test ◽  
Simulation Method ◽  
Silicon Substrates ◽  
Silicon Structure ◽  
Dlc Coating ◽  
Substrate Structure ◽  
Simulation Results

The adhesion strength of Diamond-like carbon (DLC) deposited onto silicon substrates using an arc-pulse sputtering technique was studied by experiments and numerical simulations. A scratch test was used to detect the adhesion strength of the DLC coating, which was simplified by two processes of tearing and peeling for FEA. The numerical simulations were performed by ABAQUS to calculate the two processes and integrate the result. The FEM simulation results fit with the scratch test. It is concluded that the simulation method is effusive and can be adopted to calculate the adhesion strength of DLC coating on the silicon substrate structure in other cases.

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