High-porosity mullite ceramic foams prepared by selective laser sintering using fly ash hollow spheres as raw materials

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.

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Preparation and Characterization of Macroporous Pumice-Porcelain Composite Foams

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.1513 ◽

2008 ◽

Vol 368-372 ◽

pp. 1513-1515

Author(s):

Zhen Jiang Wu ◽

Yun Fa Chen ◽

Yeon Tae Yu

Keyword(s):

Raw Materials ◽

Cell Structure ◽

Volume Density ◽

Ceramic Foam ◽

High Porosity ◽

Sem Images ◽

Open Cell ◽

Ceramic Foams ◽

Porcelain Stone ◽

Composite Foams

The open-cell macroporous ceramic foams can be used to air and water decontamination after loading catalyst. A new kind of ceramic foam was prepared using pumice, porcelain stone, quartz as main raw materials and polyurethane sponge as template. During the process, the polyurethane sponges were immersed in the powder slurry while submerged to fill all the pores, which makes it uniformly coating the sponge. Then the samples were dried at 80°C, and then sintered at 1050°C -1200°C for 2h in air. The ceramic foams present high porosity from 75% to 90%, higher compassion strength from 10 MPa to 50MPa and lower volume density from 0.15g/cm3 to 0.32g/cm3. The SEM images revealed the open-cell structure in the product.

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

Ceramics International ◽

10.1016/j.ceramint.2021.02.096 ◽

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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Based on SLS Rapid Prototyping Parts Glycosylation Performance Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.644-650.4905 ◽

2014 ◽

Vol 644-650 ◽

pp. 4905-4908

Author(s):

Lai Xia Yang ◽

Ying Bao Xue ◽

Xue Gang Zhou ◽

Rong Xia Chai

Keyword(s):

Performance Analysis ◽

Flexural Strength ◽

Rapid Prototyping ◽

Powder Mixture ◽

Raw Materials ◽

Selective Laser Sintering ◽

Dimensional Accuracy ◽

Laser Sintering ◽

Molding Machine

The use of sucrose and starch powder mixture is prepared by selective laser sintering forming parts mode, and the determination and calculation of dimensional accuracy and flexural strength of sintered parts. The results show, Sugar-based materials as raw materials can accumulate molding machine by SLS, and flexural strength and dimensional accuracy to meet the requirements.

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Study on Preparation of Ceramic Material and its Properties

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.686.57 ◽

2014 ◽

Vol 686 ◽

pp. 57-60

Author(s):

Ya Li Liu

Keyword(s):

Fly Ash ◽

Red Mud ◽

Bending Strength ◽

Sintering Temperature ◽

Raw Materials ◽

Porous Ceramic ◽

High Strength ◽

Porous Ceramics ◽

Raw Material ◽

High Porosity

This paper introduces the classification, properties and application of porous ceramic materials, reviewed preparation of porous ceramics. Taking fly ash and red mud as the main raw material to generate porous ceramics, the paper study the influence of different proportions of raw materials, sintering temperature, porosity of porous ceramic sample rate, bending strength, and microstructure. The results show that, fly ash and red mud proportioning and sintering temperature are the main factors that influence the structure and properties of samples. The 4# sample is a kind of high porosity and high strength quality of porous ceramics.

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