scholarly journals Effect of Various Process Parameters of EDC on Mild Steel Substrate and their Properties

2021 ◽  
Author(s):  
RAKESH KUMAR PATEL ◽  
Mohan Kumar Pradhan
Keyword(s):  
Hexagonal Boron Nitride ◽  
Steel Substrate ◽  
Electrical Discharge Machine ◽  
Deposition Process ◽  
Duty Factor ◽  
Mixing Ratio ◽  
Powder Mixing ◽  
Peak Current ◽  
Moulding Machine ◽  
Coated Surface

Abstract In the present study, A layer of the modified composite coated surface is made using Copper, molybdenum disulfide, and hexagonal boron nitride. For this process, Electrical discharge machine (EDM) is used but in reverse polarity. Various factors of the machine influenced the thickness of the deposited layer like the amplitude of peak current, duty factor, powder mixing ratio, used etc. For the deposition process, green compacted electrodes which was made after mixing the powder material in mortar for approximately 2.5 hour and post processing in Hot mount press moulding machine. After that the mixture powder was put in the Hot mounting press machine to made green compact electrode with specific parameters. Experiment was performed on EDM and many analysis were carried out to study the morphology of the coated surface. To get the morphology of the coated layer, FESEM images were examined and found the satisfying uniform distribution of deposited layer constituents with material powder mixing ratio of (Cu/HBN/MoS2) at (20/40/40) got with 50% duty factor and 10 Ampere peak current amplitude. Also done XRD, for the evidence of Cu, MoS2 and HBN.

Comparison of Focused Ion Beam and Conventional Techniques on Tem Specimen Preparation of Metal-Ceramic Interfaces

1998 ◽  
Vol 4 (S2) ◽  
pp. 860-861 ◽  
Author(s):  
A. Ramirez de Arellano López ◽  
W.-A. Chiou ◽  
K. T. Faber
Keyword(s):  
Focused Ion Beam ◽  
Ceramic Coating ◽  
Steel Substrate ◽  
Ion Beam ◽  
Specimen Preparation ◽  
Inhomogeneous Materials ◽  
Cross Sectional ◽  
Fine Grain ◽  
Basic Industry ◽  
Coated Surface

The results of TEM analyses of materials are critically dependent on the quality of the sample prepared. Although numerous techniques have been developed in the last two decades, differential thinning of inhomogeneous materials remains a serious problem. Recently, focused ion beam (FIB) technique has been introduced for cross-sectional sample preparation for TEM and SEM.A novel system for depositing a fine-grain (∼ 200 nm) ceramic coating on a metal surface via a patent pending Small-Particle Plasma Spray (SPPS) technique has been developed at the Basic Industry Research Laboratory of Northwestern University. To understand the properties of the coated surface, the ceramic/metal interface and the microstructure of the ceramic coating must be investigated. This paper presents a comparison of the microstructure of an A12O3 coating on a mild steel substrate prepared using conventional and FEB techniques.

Tribological Properties of Flame Sprayed Hexagonal Boron Nitride/Polyetheretherketone Coatings

2011 ◽  
Vol 410 ◽  
pp. 333-336 ◽  
Author(s):  
Jirasak Tharajak ◽  
Tippaban Palathai ◽  
Narongrit Sombatsompop
Keyword(s):  
Boron Nitride ◽  
Tribological Properties ◽  
Hexagonal Boron Nitride ◽  
Steel Substrate ◽  
Spray Coating ◽  
Wear Test ◽  
Flame Spray ◽  
Composite Powders ◽  
Wear Rates ◽  
Peek Composite

Hexagonal boron nitride (h-BN)/polyetheretherketone (PEEK) composite powders were deposited on carbon steel substrate via the flame spray coating technique. The content of hexagonal boron nitride with a mean particle size of 0.5 micrometer was varied from 2 to 8 wt% in this work. Tribological properties, namely specific wear rate and friction coefficient, at room temperature, 100 °C and 200°C were performed using Ball-on-Disc sliding wear test. At elevated temperature, h-BN could result in marked decrease in the friction coefficients and specific wear rates.

Influence of Lubricating Ceramic Content on Oxidation and Water Contact Angle of Carbon Steel

2017 ◽  
Vol 866 ◽  
pp. 295-298 ◽  
Author(s):  
Noppakun Sanpo ◽  
Jirasak Tharajak
Keyword(s):  
Contact Angle ◽  
Carbon Steel ◽  
Water Contact Angle ◽  
Hexagonal Boron Nitride ◽  
Steel Substrate ◽  
Metal Substrate ◽  
Cosmetic Products ◽  
Water Contact ◽  
Useful Knowledge ◽  
Lubricating Properties

Hexagonal boron nitride (hBN) has wide variety of possible applications in different fields as from the metallurgy to the cosmetic products. This hBN microstructure provided excellent lubricating properties and then had potential to apply on metal surface in order to improve friction and prevented the metal substrate from oxidation. In this study, the several concentrations of hBN were added into epoxy resin and coated on the carbon steel substrate. The results indicated that the optimum concentration of used hBN increased water contact angle and prevented carbon steel substrate from oxidation. This useful knowledge can be further used to support industrial work especially in preventive corrosion/oxidation field.

Role of O2/Ar mixing ratio on the performances of IZO thin film transistors fabricated using a two-step deposition process

2011 ◽  
Vol 520 (5) ◽  
pp. 1475-1478 ◽  
Author(s):  
Won Kim ◽  
Sang-Hyuk Lee ◽  
Jung-Hwan Bang ◽  
Hyun-Seok Uhm ◽  
Jin-Seok Park
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Deposition Process ◽  
Mixing Ratio ◽  
Izo Thin Film

scholarly journals Microstructure and Wear Properties of FeCrC, FeW and Feti Modified Iron Based Alloy Coating Deposited by PTA Process on AISI 430 Steel

2014 ◽  
Vol 59 (3) ◽  
pp. 925-933 ◽  
Author(s):  
T. Teker ◽  
S Karataş ◽  
S. O. Yilmaz
Keyword(s):  
Steel Substrate ◽  
Alloy Coating ◽  
Processing Parameters ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Composite Surface ◽  
Dendritic Phase ◽  
Coated Surface ◽  
Coated Surfaces ◽  
Aisi 430

Abstract The plasma transferred arc (PTA) process was used for developing wear resistance of AISI 430 steel substrate. Appropriate quantities of FeCrC, FeW and FeTi powders were combined to create conditions that synthesized M7C3 particles into reinforced Fe-based composite surface coating. The phase transformations on new created coated surfaces were comprehensively examined by using a combination of scanning electron microscopy (SEM), microanalysis by energy dispersive spectrometry (EDS), X-Ray diffraction (XRD), microhardness and abrasive wear tests. The microstructure studies of the superficial layers of the coating revealed presence of a mixture of the dendritic phase structure of austenite (γ) and fine eutectic M7C3 carbides. The results show that; the concentrations of the elements (Cr, W, Ti) added as ferroalloys, the size of dendrites formed in the coated surface, the change of hardness of the coated surfaces, the carbide volume rate and thickness of the coating changed by the variation of the processing parameters (ratio of reinforcement particulates and heat input).

A Comparative Study for Machining of Ti–6Al–4V Alloy for Multi-Criteria Response

2018 ◽  
Vol 17 (04) ◽  
pp. 515-531 ◽  
Author(s):  
Manisha Priyadarshini ◽  
Kamal Pal
Keyword(s):  
Pulse Duration ◽  
Removal Rate ◽  
Pure Copper ◽  
Copper Electrode ◽  
Duty Factor ◽  
Taguchi Optimization ◽  
Peak Current ◽  
Utility Concept ◽  
Desirability Approach ◽  
Optimization Methodology

Nowadays, it has become very difficult for the manufacturer to satisfy all its customers with satisfactory products, as they have different demands considering the responses. However, hard-to-machine materials are difficult to manufacture. This study explores the application of electro-discharge machining (EDM) of Ti–6Al–4V alloy with pulse duration (Ton), duty factor ([Formula: see text], peak current (Ip) and gap voltage (Vg) as the control parameters using pure copper electrode. Machining effects are evaluated by performance characteristics including material removal rate (MRR), tool wear rate (TWR) and surface roughness (SR) by considering the multi-criteria preference of the customers that vary with the preference of responses. For the experiment, proper orthogonal arrays are found out using Taguchi methodology. The optimum parametric settings were obtained by utility-concept-based Taguchi method which were compared with desirability-approach-based Taguchi. It was found that utility-concept-based Taguchi optimization methodology results in more feasible parametric setting which has also been confirmed by the validation experiments. The optimum values of process variables obtained were pulse duration of 30[Formula: see text][Formula: see text]s, duty factor of 9%, peak current of 10[Formula: see text]A and gap voltage of 6[Formula: see text]V to achieve maximum MRR and lower TWR with better surface finish to satisfy multi-user criteria.

Experimental Investigation of Magnetic Field Assisted Electro Discharge Deposition Process

2013 ◽  
Vol 747 ◽  
pp. 737-740
Author(s):  
B. Muralidharan ◽  
H. Chelladurai
Keyword(s):  
Magnetic Field ◽  
Electrical Discharge ◽  
Electrical Discharge Machine ◽  
Deposition Process ◽  
Dissipated Energy ◽  
Current Voltage ◽  
Micro Parts ◽  
Discharge Machine ◽  
The Stability ◽  
Pulse On Time

A new deposition technique for the fabrication of micro parts by electrical discharge machine (EDM) was investigated. Electro discharge deposition (EDDe) is an emerging process in the area of manufacturing parts in micro scale. The dissipated energy at the anode is used voluntarily to melt the wire which gets deposited on the desired surface. Researches on EDDe process investigated mainly on the effect of main operating parameters such as current, pulse on time, voltage, on the quality of deposited material. The control of melted and vaporized material would assist in limiting the plasma channel which would significantly affect the stability of deposition process. Thus, the deposition process performance would be improved by controlling the deposition particles within interelectrode gap. In this investigation, magnetic field was added to conventional electrical discharge machine to form magnetic field assisted EDDe. Experimental study using CCRD method is conducted to understand the effect of varying process parameters which includes current, voltage, pulse on time, duty cycle and field strength on deposited layer characteristics. Experimental results suggest that the magnetic field facilitates the deposition process significantly.

Hexagonal Boron Nitride Nanowalls Synthesized by Unbalanced RF Magnetron Sputtering

2011 ◽  
Vol 1307 ◽  
Author(s):  
Boumédiène BenMoussa ◽  
Jan D’Haen ◽  
Christian Borschel ◽  
Marc Saitner ◽  
Ali Soltani ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Film Thickness ◽  
Hexagonal Boron Nitride ◽  
Rf Magnetron Sputtering ◽  
Deposition Process ◽  
Dense Layer ◽  
Cross Sectional ◽  
X Ray ◽  
Optical And Electronic Properties ◽  
Film Interface

ABSTRACTA recurrent problem in the synthesis of hexagonal boron nitride (h-BN) is contamination with oxygen and carbon, leading to possible detrimental effects on optical and electronic properties. Here it is shown that the addition of H2 to the N2/Ar mixture used during the deposition process, clearly suppresses the incorporation of these elements, reducing their combined level below 5 %. The surface morphology, assessed with scanning electron microscopy (SEM), revealed the presence of h-BN nanowalls, i.e. vertically positioned 2D structures consisting out of several h-BN sheets. While Fourier transform infrared (FTIR) spectroscopy revealed the sp2 nature of the bonds, confirming the hexagonal nature of the nanowalls, the quasi-perfect stoichiometry of the material was evidenced by combining energy dispersive X-ray analysis (EDX) and Rutherford backscattering spectroscopy (RBS). The dimensions and density of these walls are clearly film thickness dependent and cross-sectional TEM images confirmed the increasing level of porosity with film thickness. A dense layer of material is present at the substrate-film interface, which gradually evolves into the 2D nanowall structures.

In situ monitoring of cracking behaviors of plasma-sprayed coatings by the laser acoustic emission technique

2009 ◽  
Vol 24 (10) ◽  
pp. 3182-3189 ◽  
Author(s):  
Koichi Taniguchi ◽  
Manabu Enoki ◽  
Makoto Watanabe ◽  
Seiji Kuroda ◽  
Kaita Ito
Keyword(s):  
Acoustic Emission ◽  
Thermal Spray ◽  
Steel Substrate ◽  
Spray Coating ◽  
Deposition Process ◽  
Maximum Principal Stress ◽  
In Situ Monitoring ◽  
Alumina Coating ◽  
Cooling Period

Multichannel acoustic emission (AE) measurements by four laser interferometers were developed and applied during a plasma-spray coating process that is known as being a high-temperature process and an extremely noisy environment in both mechanical and electrical domains. The AE signals could be successfully detected during the cooling period after the deposition, and it was clearly indicated that a higher preheating temperature resulted in the improvement of bonding between splats and/or at the interface of the coating and the substrate. The maximum principal stress generated during the deposition process was calculated by the transient heat and stress analysis and the obtained AE events. The critical stress for crack initiation of the alumina coating on a steel substrate with an NiCr bond coat layer was estimated as 30∼45 MPa. The developed techniques were shown to be a potential tool for in situ monitoring of the thermal spray process, by which an increase in the reliability of thermal spray coatings can be expected.

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