Studies on preparation of ceramic inks and simulation of drop formation and spread in direct ceramic inkjet printing

Ramakrishnan, N.; Rajesh, P.K.; Ponnambalam, P.; Prakasan, K.

doi:10.1016/j.jmatprotec.2005.03.021

Cited by 36 publications

(22 citation statements)

References 10 publications

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“…Namely, [104][105][106]111,121,143,[146][147][148][149][150][151][152][153] in which numerical approaches have been used, whereas in [154] empirical and in [145] analytical ones have been used. In [17][18][19]121,143] issues of topology have been addressed by means of the numerical methods and in [144] the effects of various process parameters on the mechanical properties of Table 11.…”

Section: Materials Jettingmentioning

confidence: 99%

“…Process parameter (Variable) [156] Surface roughness Layer thickness, orientation angle [157] Surface roughness Layer thickness, roller temperature, roller speed, platform retract [158] Surface roughness Layer thickness, heated roller temperature, heated roller speed, platform retract [159] Organic content Effective diffusivity, diffusion path length, distance from core [160] Thermochemical modelling Roller temperature, velocity, indentation [161] Tensile strength Layer thickness, heater temperature, platform retract, heater speed, laser speed, feeder speed, platform speed [162] Build time [163] Build time Cross-hatching of extraneous material [164] Temperature profile Roller temperature, roller speed, chamber air temperature, base plate temperature, and laser cutting time [165] Thermal modelling Roller temperature, roller speed, chamber air temperature, base plate temperature, and laser cutting time [143] Deformation behavior of droplets Impact angle [144] Stiffness Spatial orientation of reinforcement in randomly oriented multi material [145] Pressure, axial velocity histories [104] Fingering and splashing of the droplet Droplet velocity [105] Desired shape after impact Initial droplet shape [106] Microstructure, temperature field Number of layers, layer height, wire feed rate, travel speed, heat input [111] Spreading and evaporation Droplet material [147] Droplet volume, temperature, and pressure Heating pulse conditions [148] Pressure rise, ink injection length, droplet weight Electric pulse shape and voltage [149] Vapor blanket height between the evaporating droplet, substrate, formation of vapor bubbles Temperature [150] Drop formation, ejection, spread and flow of ceramic inks in micro-channels Solid loading concentrations of alumina/zirconia powder in ceramic inks [151] Pressure propagation in the bubble [152] Magnitude of the circular thin film of the incoming droplets Impact velocity [153] Droplet morphology, break-up time, flying distance, droplet volume [154] Droplet volume, droplet velocity Driving time, driving volume in the pressure chamber, volume factor [155] Droplet fluid dynamics and heat transfer related parts...…”

Section: Kpimentioning

confidence: 99%

See 1 more Smart Citation

Modelling of additive manufacturing processes: a review and classification

Stavropoulos

Foteinopoulos

2018

Manufacturing Rev.

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Abstract. Additive manufacturing (AM) is a very promising technology; however, there are a number of open issues related to the different AM processes. The literature on modelling the existing AM processes is reviewed and classified. A categorization of the different AM processes in process groups, according to the process mechanism, has been conducted and the most important issues are stated. Suggestions are made as to which approach is more appropriate according to the key performance indicator desired to be modelled and a discussion is included as to the way that future modelling work can better contribute to improving today's AM process understanding.

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Section: Materials Jettingmentioning

confidence: 99%

Section: Kpimentioning

confidence: 99%

Modelling of additive manufacturing processes: a review and classification

Stavropoulos

Foteinopoulos

2018

Manufacturing Rev.

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“…3, the main stages of formation of ceramic ink drop were observed which includesd ejection, stretching of liquid (1-3), contraction of liquid thread (4-5), breakup of thread into the primary drop (6), and satellite formation by pinch-off of liquid thread from nozzle exit (7)(8)(9)(10). Satellite formation occurs because of the break of liquid thread.…”

Section: Results and Discussion 51 Drop Formationmentioning

confidence: 99%

“…per cent of ceramic and dispersant) was measured using Brookfield digital viscometer Model DV-E. The preparation of alumina and zirconia-based ceramic inks is extensively discussed by RamaKrishnan 7 . The selection of appropriate binders and dispersants combined with high shear and ultrasonic mixing to produce ceramic components by multilayer printing has been reported by Song 8 .…”

Section: Preparation Of Ceramic Inkmentioning

confidence: 99%

Dynamic Characteristics of Drop-substrate Interactions in Direct Ceramic Ink-jet Printing using High Speed Imaging System

Somasundaram¹,

Kanagaraj²,

Prakasan³

2009

DSJ

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(DCIJP). The DCIJP finds applications in the fabrication of complex-shaped monolithic ceramic parts, ceramic composites, solid-oxide fuel cells, integrated circuits, components of fuel cells, gas turbines, ceramic tiles used in space vehicles, and many other equipments operating at high temperature owing to their ability to retain strength at high temperature. Ceramic pottery industry can also benefit from this process.The DCIJP uses ceramic powder presented in a carrier medium which is deposited using a delivery system actuated by a piezoelectric device. A mathematical model for droplet formation from orifice and its deposition on substrate in DCIJP has been developed by Vijay and Prakasan 6 . The success of this process depends on the systematic preparation of ceramic inks, droplet formation in the print head, and droplet deposition on the substrate. It can be used to fabricate larger parts like ceramic tiles for aerospace vehicles ABSTRACTSolid freeform fabrication has the potential to construct ceramic parts, directly from computer aided design (CAD) data, without a mould or a die by the addition of material. Direct ceramic ink-jet printing is one of the techniques used in freeform fabrication. Ceramic tiles used in space vehicles can be produced by this method wherein a porous ceramic substrate (Al 2 O 3 /SiC) can be filled with a ceramic ink and processed subsequently. The success of this process depends on the systematic preparation of ceramic inks and the deposition of the ceramic ink on the substrate. In this paper, photographic studies were made on the characteristics of ceramic ink droplets when these are deposited on a porous ceramic substrate from a burette under gravity. For this investigation, ceramic inks were prepared using different amounts (0.253.0 vol. %) of an organic dispersant (oleic acid) added to a ceramic composition containing different amounts: (a) (7.5 17.5 vol. %) of alumina and (b) (7.515.0 vol. %) of zirconia with ethyl alcohol as a carrier. From this study, the drop formation, sedimentation in the drop, spread of drop on the substrate, splashing of drop impinging a previous ceramic ink layer on the substrate, and merging of droplets after deposition, are observed. This method is useful for manufacturing of parts with ceramic fibres filled with ceramic particles and this study can provide inner details on the behaviour of ink drops.

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“…For DCIJP a number of different inks has already been investigated. Ceramic powders used for the inks include ZrO 2 [7][8][9][10], Al 2 O 3 [11,9,10], TiO 2 [12], BaTiO 3 [13] or PZT [14,15]. Also different technologies were applied for fabrication of parts, including continuous [13] and drop-on-demand printing [7,8,4,16,17].…”

Section: Introductionmentioning

confidence: 99%

Highly loaded alumina inks for use in a piezoelectric print head

Polsakiewicz¹,

Kollenberg

2011

Materialwissenschaft Werkst

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Ink jet printing techniques are used for an increasing number of materials and applications. Properties of the used inks have great influence on process stability and accuracy as well as the resulting part properties. Inks containing ceramic particles have been applied in various studies and applications. The criteria identifying suitable inks vary depending on the applied printing technology. In this study, inks for application in a piezoelectric print head were investigated. Alumina inks with solid loadings up to 21 vol.-% were prepared and characterized. The Influence of different solid loadings, dispersant concentrations and binding agents was examined. The prepared inks show sufficient stability and fit literature recommendations for successful drop ejection. Considering rheological aspects, two inks with light shear-thinning behaviour and viscosities of 18 mPas and 23 mPas at high shear rates were recommended for upcoming printing tests. The Re/We 1/2 ratio can be used for predetermination of print ability but the influence of the surface tension is not sufficiently taken into account using the presented calculations. So further printing experiments are essential for clarification of the calculations and obtained print ability values. Keywords: Suspension / particle processing / materials processing / rheology / alumina /

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Studies on preparation of ceramic inks and simulation of drop formation and spread in direct ceramic inkjet printing

Cited by 36 publications

References 10 publications

Modelling of additive manufacturing processes: a review and classification

Modelling of additive manufacturing processes: a review and classification

Dynamic Characteristics of Drop-substrate Interactions in Direct Ceramic Ink-jet Printing using High Speed Imaging System

Highly loaded alumina inks for use in a piezoelectric print head

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