Mechanical Characterization of a CVD Diamond Coating by Nanoindentation Test

2003 ◽  
Vol 125 (3) ◽  
pp. 309-314 ◽  
Author(s):  
L. Bruno ◽  
F. M. Furgiuele ◽  
G. Sciume´
Keyword(s):  
Chemical Vapor ◽  
Young Modulus ◽  
Fem Analysis ◽  
Cvd Diamond ◽  
Nanoindentation Test ◽  
Displacement Curve ◽  
Chemical Vapor Deposition Diamond ◽  
Hardening Law ◽  
Cvd Diamond Coating

A FEM analysis was carried out to study the mechanical behavior of a hard coating subjected to a nanoindentation test performed with a Berkovich indenter. The nanoindentation test was simulated by FEM code MSC Marc. The case study is a coating of CVD (Chemical Vapor Deposition) diamond. By the simulation it is possible to obtain the load-displacement curve by which Young modulus and hardness may be evaluated. The paper also analyzes the residual stresses developed at the end of the unloading phase and the influence of the strengthening law to determine the hardness and the elastic modulus of the CVD diamond. The analysis has demonstrated, by the comparison with the experimental results, that the numerical model well describes the behavior of the coating of CVD diamond in the nanoindentation test; in addition it was pointed out that the choice of the hardening law is a crucial aspect in the simulation.

Nondestructive Evaluation of CVD Diamond Coating Layers Using the Leaky Rayleigh Surface Wave

2006 ◽  
Vol 326-328 ◽  
pp. 701-704 ◽  
Author(s):  
Wen Wu Wang ◽  
Sung Jin Song ◽  
Hak Joon Kim ◽  
Dong Ju Yang ◽  
Sung Duk Kwon
Keyword(s):  
Surface Wave ◽  
Nondestructive Evaluation ◽  
Coating Layer ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Diamond Coating ◽  
Rayleigh Surface Wave ◽  
Mechanical Parts ◽  
Time Trace ◽  
Cvd Diamond Coating

Chemical vapor deposit (CVD) diamond coating layer is expected to extend the lifetime of mechanical parts that are used severely abrasive conditions. However, one of the most severe problems is that the delamination between the CVD diamond coating layer and the silicon substrate occurs frequently due to large difference in the material properties. Therefore, the nondestructive evaluation of adhesive property of CVD diamond coating layer is needed. To address such a need, back-scattered Rayleigh surface wave is currently applied. However, the interpretation of the acquired signal is not easy at all. To take care of such a difficulty, we proposed the time trace angular scan (TTAS) plot and the frequency spectrum angular scan (FSAS) plot that can make possible of the systematic interpretation of the back-scattered signals from the diamond coating layer. In this paper, the concept of the TTAS and FSAS plots and the experimental results presented to demonstrate the effectiveness of the proposed approach.

Analysis of Interlayer between WC–Co and CVD Diamond Film

2008 ◽  
Vol 375-376 ◽  
pp. 92-96 ◽  
Author(s):  
Wen Zhuang Lu ◽  
Dun Wen Zuo ◽  
Min Wang ◽  
Feng Xu
Keyword(s):  
Cutting Tools ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Diamond Coatings ◽  
X Ray Diffraction ◽  
Raman Scattering Spectroscopy ◽  
Electron Probe Micro Analyzer ◽  
Mechanical Bond ◽  
Cvd Diamond Coating ◽  
Better Than

Electroplated Cr, Ni and Cu were used as interlayer for chemical vapor deposition (CVD) diamond coating on WC–Co cemented carbide cutting tools. The electroplated interlayers were studied by Scanning Electron Microscope (SEM), Electron Probe Micro Analyzer (EPMA) and X-ray diffraction (XRD). The CVD diamond coatings were studied by SEM and Raman Scattering Spectroscopy (Raman). The experimental results show that there is diffusion bonded interface between electroplated layer and WC-Co substrate after H plasma treatment, the bond between electroplated layers and WC-Co substrate changes from mechanical bond to metallurgical bond and the adhesion becomes stronger. Electroplated Cr interlayer forms new phases of Cr3C2 and Cr7C3 under CVD conditions, while electroplated Ni and Cu interlayers do not form carbides under CVD conditions. Cr carbides have good chemical compatibility to diamond, and they are propitious to diamond nucleation and growth during the deposition period. The diamond crystal microstructure, diamond quality and adhesion on Cr interlayer are better than those on electroplated Ni and Cu interlayers.

scholarly journals Design of Deterministic Microstructures as Substrate Pre-Treatment for CVD Diamond Coating

Surfaces ◽  
2019 ◽  
Vol 2 (3) ◽  
pp. 497-519
Author(s):  
Richard Börner ◽  
Michael Penzel ◽  
Thomas Junge ◽  
Andreas Schubert
Keyword(s):  
Substrate Surface ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Functional Surface ◽  
Cooling Process ◽  
Finite Elements Analysis ◽  
Pre Treatment ◽  
Cvd Diamond Coating ◽  
Steel Substrates ◽  
Suitable Process

The coating of highly stressed components with chemical vapor deposition (CVD) diamond can extend their lifetime. In particular, the combination of steel substrates with diamond layers would find many applications in industrial production. However, there are some challenges, for example, the high mismatch in the thermal expansion between steel and diamond, which commonly leads to the delamination of the coating. Thus, a pre-treatment of the substrate surface is needed. Particle blasting has been established in some studies as a suitable process. However, apart from particle residues in the surface of the substrate, these surfaces have a stochastic character, which limits their reproducibility and modification options. This paper presents some instructions for the recording and derivation of defined properties of those surfaces. The conversion of characteristic surface features into quantitative process parameters could serve as the foundation for the manufacturing of deterministic microstructures, especially those produced by ultrasonic vibration superimposed machining. This should increase the reproducibility and the possibilities of the modification with regard to the structural shaping of the functional surface. The design was developed using both a kinematic surface simulation tool as well as a finite elements analysis for the cooling process of the coating–substrate–composite. A high accordance with real finished surfaces was achieved.

Lateral micro-ion beam induced charge characterization of chemical vapor deposition diamond

2002 ◽  
Vol 90 (1-2) ◽  
pp. 191-195
Author(s):  
Lu Rongrong ◽  
C. Manfredotti ◽  
F. Fizzotti ◽  
E. Vittone ◽  
A. Logiudice
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Ion Beam ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Diamond ◽  
Induced Charge

Growth and characterization of combined single-crystalline and polycrystalline CVD diamond wafer

2015 ◽  
Vol 1734 ◽  
Author(s):  
A.L. Vikharev ◽  
A.B. Muchnikov ◽  
D.B. Radishev ◽  
V.A. Isaev ◽  
O.A. Ivanov ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Chemical Vapor ◽  
Polycrystalline Diamond ◽  
Cvd Diamond ◽  
Annealing Process ◽  
Single Crystalline ◽  
Chemical Vapor Deposited ◽  
Thermal Annealing Process ◽  
Industrial Use

ABSTRACTThe study of combined single-crystalline and polycrystalline chemical vapor deposited (CVD) diamond wafers is reported. Combined CVD diamond wafers up to 75 mm in diameter were grown, which consist of great number of single-crystalline diamond sections grafted in a polycrystalline diamond matrix. The grown combined CVD wafers were characterized by the Raman spectroscopy. It was shown that in the grafting process, the single- and polycrystalline areas of the combined wafer undergo insignificant stresses, which can be released during the thermal annealing process. Fabricated combined CVD diamond can be used in various applications that employ unique properties of diamond and potentially suitable for industrial use.

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