Effect of high-temperature preheating on the selective laser melting of yttria-stabilized zirconia ceramic

Liu, Qi; Danlos, Y.; Song, Bo; Zhang, Baicheng; Yin, Shuo; Liao, Hanlin

doi:10.1016/j.jmatprotec.2015.02.036

Cited by 121 publications

(58 citation statements)

References 14 publications

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“…The process faced, however, important limitations, such as poor surface roughness, high costs, extreme complexity of the machine, and difficulties in building larger parts. Liu has also proved in a similar work, that preheating of at least 1500 °C is needed to reduce the number of cracks in SLM manufactured yttria‐stabilized zirconia.…”

Section: Introductionmentioning

confidence: 88%

An Innovative Selective Laser Melting Process for Hematite‐Doped Aluminum Oxide

et al. 2019

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Selective Laser Melting (SLM) technology is successfully applied to manufacture aluminum oxide parts. The obtained samples are presented and characterized in terms of density, mechanical properties, and structure. The starting material is a powder composed of aluminum oxide granules doped with a small quantity of iron oxide (hematite) as an absorption additive. A green short-pulsed nanosecond (ns) laser is used in the experimental inhouse designed and built SLM machine. The absorption, reflectance, and transmittance of the starting powder for a laser with wavelength of 532 nm are evaluated using an integrating sphere and it is found that absorption of 68% is sufficient for the established process. Various laser and scanning parameters are studied and a process window is found. Densities above 90% are achieved in the one step process. Bi-axial flexural strength of 25 MPa in average is recorded in the ball on 3 balls test. Finally, powder diffraction measured in a synchrotron beamline shows the presence of less than 0.6% of hercynite after laser processing.

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Section: Introductionmentioning

confidence: 88%

An Innovative Selective Laser Melting Process for Hematite‐Doped Aluminum Oxide

et al. 2019

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“…However, this method suffers from bad surface quality for the produced part. Wilkes et al reported generally crack-free samples through a preheating process showing that powder bed preheating reduces thermal stresses and the formation of cracks [9], but superficial microcracks still existed for large parts during the process [48,54,63]. The fine cracks are presumably formed due to thermal stress from the uneven distribution of heat within the laser spot, which induces different volume contractions during the melting and cooling process [64].…”

Section: Principles For Optimum Slm/sls Processmentioning

confidence: 99%

Processing Parameters for Selective Laser Sintering or Melting of Oxide Ceramics

Zhang¹,

LeBlanc²

2018

Additive Manufacturing of High-Performance Metals and Alloys - Modeling and Optimization

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In this chapter, we present a detailed introduction to the factors which influence laser powder bed fusion (LPBF) on oxide ceramics. These factors can be in general divided in three main categories: laser-related factors (wavelength, power, scanning speed, hatch distance, scan pattern, beam diameter, etc.), powder-and material-related factors (flowability, size distribution, shape, powder deposition, thickness of deposited layers, etc.), and other factors (pre-or post-processing, inert gas atmosphere, etc.). The process parameters directly affect the amount of energy delivered to the surface of the thin layer and the energy density absorbed by the powders; therefore, decide the physical and mechanical properties of the built parts, such as relative density, porosity, surface roughness, dimensional accuracy, strength, etc. The parameter-property relation is hence reviewed for the most studied oxide ceramic materials, including families from alumina, silica, and some ceramic mixtures. Among those parameters, reducing temperature gradient which decreases the thermal stresses is one of the key factors to improve the ceramic quality. Although realizing crack-free ceramics combined with a smooth surface is still a major challenge, through optimizing the parameters, it is possible for LPBF processed ceramic parts to achieve properties close to those of conventionally produced ceramics.

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“…Great interest is manifested by the improvement of "single-step" AM technologies of manufacturing of ceramic parts [1][2][3][4][5][6][7][8]. In recent years, the selective laser sintering (SLS) manufacturing processes have been used for the production of ceramic parts [2][3][4][5][6][7][8]. SLS is an additive manufacturing process for creating 3D parts with complex geometries because the use of powder bed SPS makes it possible to densify the UHTC composites at a lower temperature and in a shorter time compared with conventional techniques of high temperature pressing (HIP).…”

Section: Introductionmentioning

confidence: 99%

“…The list of UHTC materials with melting temperatures above ~3000 K is limited to perhaps 16 phases or compounds (Table I) Table 1. Mechanical and thermodynamic properties of UHTC [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] The use of SLS allows creating new composite materials simultaneously with the manufacture of structural elements. Leu and co-authors (2008), Sun, and Gupta (2008), Pattnaik and co-authors (2012) showed the possibility of freeform parts fabrication of ultra-high tempera-ture ceramics (UHTC) based on the zirconium diboride by laser sintering [5,6].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Mechanical Properties of Ceramic Parts Produced by Additive Technologies in Wide Range of Loading Rates

Skripnyak¹,

Skripnyak²,

Skripnyak³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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The multiscale simulation approach was used to study the mechanical behavior of ceramic parts created by the selective laser sintering (SLS) technology. The goal of the research was studding the difference in the elastic moduli and dynamic strength of ceramic parts, manufactured by the high-temperature sintering and the selective laser sintering. The mechanical properties of ceramic parts were determined by statistic averaging of the results of multi scale computer simulations of representative volumes of materials under loadings. It was shown that the probability of the fracture of such parts under dynamic loading depends on the time history evolution of the distribution of local values of specific internal energy and the damage parameter on the mesoscale level. It was found that the stress threshold of the dynamic fracture beginning of ceramic bodies depends on the distribution of the pore sizes and not just on the average porosity.

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Effect of high-temperature preheating on the selective laser melting of yttria-stabilized zirconia ceramic

Cited by 121 publications

References 14 publications

An Innovative Selective Laser Melting Process for Hematite‐Doped Aluminum Oxide

An Innovative Selective Laser Melting Process for Hematite‐Doped Aluminum Oxide

Processing Parameters for Selective Laser Sintering or Melting of Oxide Ceramics

Simulation of Mechanical Properties of Ceramic Parts Produced by Additive Technologies in Wide Range of Loading Rates

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