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Article
Copper Grown Diamond Films
Diamond has been synthesised on copper using Microwave Plasma Chemical Vapour Deposition (MPCVD). The effect of substrate pre-treatment including different polishing and cleaning on diamond nucleation was inve...
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Article
Quantitative evaluation of adhesion of diamond coatings
This paper presents a model to evaluate quantitatively the adhesion of diamond coating according to indentation tests. It is found that small indentation load causes round spallation of the coating, no matter ...
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Article
Diamond deposition on copper: studies on nucleation, growth, and adhesion behaviours
This paper presents a systematic study on diamond growth on copper by microwave plasma chemical vapour deposition (MPCVD). It includes the following four main parts. 1. Effect of substrate pre-treatment on dia...
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Article
A new surface pretreatment approach for enhancing diamond nucleation
In this paper we present a new approach of surface pretreatment for enhancing diamond nucleation. The copper substrates were fixed inside a plastic cylinder container with diamond powder diluted in water. This...
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Article
Study of diamond adhesion behavior on chromium and titanium for obtaining adherent diamond coatings on steel
It is known that diamond films display poor adhesion on metals such as copper and steel. One solution to overcome the poor adhesion is to use interlayer materials. In this study we report results of an investi...
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Article
Novel Time-modulated Chemical Vapor Deposition Process for Growing Diamond Films
Smooth polycrystalline diamond films were deposited onto silicon substrates using a newly developed time-modulated chemical vapor deposition (TMCVD) process. The distinctive feature of the TMCVD process involv...
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Article
Promoting secondary nucleation using methane modulations during diamond chemical vapor deposition to produce smoother, harder, and better quality films
In this paper, we present results obtained from a comparison study relating to the deposition of diamond films using two processes, namely, time-modulated chemical vapor deposition (TMCVD) and conventional CVD...
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Article
Role of substrate temperature during diamond film growth using the newly developed time-modulated chemical vapor deposition process
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Article
Growth of (100) oriented diamond grains by the application of lateral temperature gradients across silicon substrates
Polycrystalline diamond films with a predominant (100) texture were deposited onto silicon substrates using hot-filament chemical vapor deposition. During film deposition, different temperature gradients were ...
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Article
Time-modulated chemical vapor deposition of diamond films
This article investigates the role of substrate temperature in the deposition of diamond films using a newly developed time-modulated chemical vapor deposition (TMCVD) process. TMCVD was used to deposit polycr...
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Article
Structural Modeling of the Mechanical Behavior of Periodic Cellular Solids: Open-Cell Structures
The numerical simulation of random cellular metals, e.g., metal foams, is still connected with many unsolved problems due to their stochastic structure. Therefore, a periodic model of cellular metals is develo...
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Article
Investigation of cellular solids under biaxial stress states
The determination of the yield surface of cellular and porous materials requires experimental procedures under multi-axial stress states as the yield behavior is sensitive to the hydrostatic stress and as simp...
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Article
Cobalt diffusion in different microstructured WC-Co substrates during diamond chemical vapor deposition
Our investigation on diamond deposition using cemented tungsten carbide (WC-Co) has shown that diamond particles deposit at different rates onto micrograin and coarse-grain WC-Co substrates. Diamond deposition...
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Chapter and Conference Paper
Numerical and experimental studies of damage in porous materials
Metallic foams comprise a steadily growing group of porous materials and are gaining more and more importance in industrial applications. Main advantages of this innovative material are high ability of energy ...
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Chapter and Conference Paper
Influence of the morphology of adhesive joining on the mechanical properties of periodic metal hollow-sphere-structures
Hollow-sphere-structures (HSS) originate a new group of cellular materials characterised by a high reproducibility of geometry and therefore mechanical properties. Well-known advantages of cellular materials a...
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Article
Time-modulated CVD process optimized using the taguchi method
The Taguchi method is used herein to optimize the time-modulated chemical vapor deposition (TMCVD) process. TMCVD can be used to deposit smooth, nanocrystalline diamond (NCD) coatings onto a range of substrate...
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Article
Human microvascular endothelial cell seeding on Cr-DLC thin films for heart valve applications
In this investigation, Cr-modified diamond-like carbon (Cr-DLC) films were studied for potential applications in mechanical heart valves. Three Cr-DLC samples were prepared using a magnetron sputtering techniq...
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Article
Chemically functionalized carbon nanotubes and their characterization using thermogravimetric analysis, fourier transform infrared, and raman spectroscopy
This article reports key findings on the chemical functionalization of carbon nanotubes (CNT). The functionalization of chemical vapor-deposited CNT was carried out by treating tubes with polyvinyl alcohol thr...
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Article
Modelling the mechanical behaviour of adhesively bonded and sintered hollow-sphere structures
The mechanical properties of periodic hollow-sphere structures are investigated numerically. Young’s modulus and the Poisson ratio are determined in order to describe their linearly elastic behaviour. The init...
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Article
Adsorption and desorption of oxygen at metal-oxide interfaces: Two-dimensional modeling approaches
A numerical approach is presented for the segregation of atomic oxygen at Ag-MgO interfaces for a system of MgO particles dispersed in an Ag matrix. General segregation kinetics is considered, and the coupled ...
