Laser-powder interaction and meltpool dynamics govern the physics behind selective laser melting process. Spattering is an unavoidable phenomenon taking place during process which results in reconstituted particles falling within powder bed. These are known to influence between incident beam powder. can consequently have a negative effect on final part integrity quality of recycled Hence, it crucial assess characteristics spatter avoid printing defective parts. This work reports detailed...

Despite the accelerated growth of laser-powder bed fusion in recent years, there are still major obstacles to be overcome before technology enjoys truly widespread adoption. These include inconsistent part quality and repeatability issues linked variability properties printed parts. Commonly, print location across build platform is overlooked assumed have little or no effect on overall properties. There a lack previous systematic studies knowledge influences parameter final Therefore,...

In this work, a gas atomised stainless steel AISI 316L powder was used as metal matrix and SiC employed nano reinforcement. The powders were experimentally characterised to determine the effect of morphology, size, levels reinforcement on flowability. developed via metallurgy route material, process conditions various investigated through microhardness sintered samples. Sintered samples produced from + PVA mixes presented improved hardness. Analysis Energy Dispersive X-ray measurements...

Abstract We describe a novel solid state crystallisation method for optimising thin film transparent conductive oxide when deposited on flexible polymer substrates. The is based ultra-short non-thermal laser sintering of indium tin (ITO) films. In this study, we used commercial ITO films polyethylene terephthalate substrate with relatively low melting temperature compared glass. demonstrate the use scanning high pulse overlapping at fluences seven times less than threshold required...

Laser-powder bed fusion was identified as a promising technique for manufacturing metal matrix composites. However, over decade later, little progress has been made in addressing the persisting issues hindering wider exploitation and industrial usage of Therefore, present study proposes implementation feasible solution to accomplish research advancements Where, concerning their performance cost have driven this towards development novel scanning strategy. A hatching system based on sine wave...

Abstract The fabrication of low-cost and mechanically robust flexible electronic patterns has increasingly gained attention due to their growing applications in displays, touch screen panels, medical devices, solar cells. Such require cost-effective deposition metals a well-controlled manner potentially using nanoparticles (NPs). presence solvent precursors NP based inks impacts the electrical conductivity printed pattern post-processing heating step is typically performed restore properties...

Strontium titanate (SrTiO 3 ) filled polytetrafluroethylene (PTFE) substrates were fabricated through sigma mixing (SM), extrusion (E), calendering (C) followed by hotpressing (H) (SMECH) process. The filler dispersion in the polymer matrix and surface morphology studied using scanning electron microscopic (SEM) technique. permittivity (ɛ′ r loss tangent (tan δ) of composites measured precision impedance vector network analyzers. experimental was compared with theoretically predicted values....

Enabling the carbonation reaction of Limestone waste by using CaZrO 3 nanoadditives.

We report here a prototype laboratory setup for detecting ethylene (C 2 H 4 ) in ppm level employing sensor made of multiwalled carbon nanotubes 40 nm average tube diameter. The proposed reversible chemoresistive is fabricated using Kapton as the substrate onto which are coated thick film technology. IDT silver electrodes printed piezo head based ink-jet printing increases electrical resistance element measured on exposure to different concentrations potentiostat and data acquisition system....

Silver thin films are well known as the most sensitive material for surface plasmon resonance (SPR) based analysis. However, use of silver this purpose is limited by three main issues, namely poor adhesion to plastic substrates, chemical instability in both air and aqueous environments hence difficulty functionalizing coated substrate immobilizing biomolecular ligands conventional liquid phase methods. In work, we have successfully addressed these problems using gas-phase coating processes....

We present a low-cost fabrication procedure for the production of nanoscale periodic GaAs nanopillar arrays, using nanosphere lithography technique as templating mechanism and electrochemical metal assisted etch process (MacEtch).

Zeonor plastics are highly versatile due to exceptional optical and mechanical properties which make them the choice material in many novel applications. For potential use flexible transparent optoelectronic applications, we have investigated as substrates for deposition of ZnO AZO thin films. Films were prepared by pulsed laser at room temperature oxygen ambient pressures 75, 150 300 mTorr. The growth rate, surface morphology, hydrophobicity structural, electrical as-grown films with...

Cuprous halides are among the most studied inorganic materials for excitonic related linear/non-linear optical processes due to their large binding energies (∼190 and 108 meV CuCl CuBr, respectively). In recent years, we have thin films deposited by vacuum evaporation sputtering techniques on a variety of substrates. We now report extension this research deposition nanocrystals flexible substrates via spin-on technology. study, present synthesis, characterization embedded in organic...

This study evaluates the phase and microstructural evolution of additively manufactured (AM) Nickel Titanium (NiTi) alloy, across interface with 316L stainless steel build plate, in order to understand processing parameter (input power, layer thickness scan speed), composition, microstructure interrelationships necessary achieve excellent multi-material bonding between NiTi 316L. The effect process parameters utilised was characterised using Scanning Electron Microscope (SEM), Backscatter...

We propose a novel low temperature annealing method for selective crystallization of gold thin films. Our is based on non-melt process using highly overlapped ultrashort laser pulses at fluence below the damage threshold. Three different wavelengths femtosecond with fundamental (1030 nm), second (515 nm) and third (343 harmonic are used to crystallize 18-nm 39-nm thick room deposited films quartz substrate. Comparison confirms that improvements in electrical conductivity up 40% achievable...