Preparation of high-porosity Al2O3 ceramic foams via selective laser sintering of Al2O3 poly-hollow microspheres

2020 ◽  
Vol 46 (4) ◽  
pp. 4240-4247 ◽  
Author(s):  
Shan-Shan Liu ◽  
Meng Li ◽  
Jia-Min Wu ◽  
An-Nan Chen ◽  
Yu-Sheng Shi ◽  
...  
Keyword(s):  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Hollow Microspheres ◽  
High Porosity ◽  
Ceramic Foams ◽  
Al2o3 Ceramic

Finite Element Simulation of Combined Forming of Selective Laser Sintering and Cold Isostatic Pressing

2010 ◽  
Vol 26-28 ◽  
pp. 60-66
Author(s):  
Yan Ying Du ◽  
Yu Sheng Shi ◽  
Qing Song Wei
Keyword(s):  
Finite Element ◽  
Metal Powder ◽  
Selective Laser Sintering ◽  
Good Method ◽  
Laser Sintering ◽  
Cold Isostatic Pressing ◽  
High Porosity ◽  
Isostatic Pressing ◽  
Metal Parts ◽  
Short Time

Selective Laser Sintering could manufacture high complex metal parts in short time but with high porosity and low strength. The components from Cold Isostatic Pressing have excellent performance with uniform organizational structure, high size precision, and high density. It, however, could not form high complex parts because of the difficulties of bag manufacture. So it will be a good method to combine Selective Laser Sintering and Cold Isostatic Pressing to make complicated metal parts. In this paper, the specimens of stainless steel were made by the combined Selective Laser Sintering and Cold Isostatic Pressing forming route. And the simulation of Cold Isostatic Pressing was carried out by finite element method and Drucker-Prager-Cap constitutive model in ABAQUS/Explicit computer program. The property of metal powder was measured by experiments. The effects of bag on Cold Isostatic Pressing have been discussed. It is different from the Cold Isostatic Pressing of metal powder that the bag has little influence on both shape and size of the specimen. The results of simulation show a good agreement between the experimental results and the calculated results. The simulation can give a useful direction to dimension and shape designs of the combined forming of Selective Laser Sintering and Cold Isostatic Pressing.

Direct Fabrication of Bulk Nanostructured Ceramic from Nano-Al2O3 Powders by Selective Laser Sintering

2007 ◽  
Vol 329 ◽  
pp. 613-618 ◽  
Author(s):  
Li Da Shen ◽  
Y.H. Huang ◽  
Zong Jun Tian ◽  
Guo Ran Hua
Keyword(s):  
Selective Laser Sintering ◽  
Laser Sintering ◽  
X Ray Diffraction ◽  
Ceramic Powders ◽  
Technological Parameters ◽  
Bulk Materials ◽  
Al2o3 Ceramic ◽  
X Ray ◽  
Nanostructured Ceramic ◽  
Direct Fabrication

Nanostructured ceramic bulk materials were achieved from nano-Al2O3 ceramic powders via direct selective laser sintering (SLS). SLS as a non-traditional machining technology of Rapid Prototyping was introduced and compared with other ceramic forming technologies. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were applied to analyze the microstructure of the ceramic bulk materials. These results demonstrated that the nano-Al2O3 ceramic powders can be sintered into bulk materials maintained nanostructure with some technological parameters. It was found that the nanostructured ceramic bulk exhibited unique microstructure and was free formed rapidly by this sintering technology.

Selective laser sintering of porous Al2O3-based ceramics using both Al2O3 and SiO2 poly-hollow microspheres as raw materials

2021 ◽  
Vol 47 (11) ◽  
pp. 15313-15318
Author(s):  
Jia-Min Wu ◽  
Meng Li ◽  
Shan-Shan Liu ◽  
Yu-Sheng Shi ◽  
Chen-Hui Li ◽  
...  
Keyword(s):  
Raw Materials ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Hollow Microspheres
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