Preparation and Properties of Porous Coal-series Kaolin Ceramics by Selective Laser Sintering
Porous ceramics with complex structure were prepared by selective laser sintering (SLS) method using coal-series kaolin as raw materials. The effect of SLS process parameters and sintering temperature on properties of porous coal-series kaolin ceramics was investigated. The phase composition and mic...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2018-07-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/Y2018/V46/I7/36 |
| Summary: | Porous ceramics with complex structure were prepared by selective laser sintering (SLS) method using coal-series kaolin as raw materials. The effect of SLS process parameters and sintering temperature on properties of porous coal-series kaolin ceramics was investigated. The phase composition and microstructure of porous coal-series kaolin ceramics were characterized by X-ray diffractometer (XRD) and scanning electron microscope (SEM). The results indicate that the coal-series kaolin/E12 composite powders can be formed well through SLS method. The green bodies show the superior quality. <i>Z</i> direction error is 10.43%, relative density is 37.89% and bending strength is 0.984MPa under laser power of 5W, scanning speed of 2000mm/s, scanning space of 0.13mm and layer thickness of 0.15mm. With the increase of sintering temperature, the linear shrinkage and bending strength of the porous coal-series kaolin ceramics increase gradually, while the open porosity decreases. The porous coal-series kaolin ceramics possess a high open porosity of 44.55% and a good bending strength of 6.1MPa when the sintering temperature is 1450℃. The main phase in the prepared porous ceramics is mullite phase, and they have a typical three-dimensional skeleton structure. |
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| ISSN: | 1001-4381 1001-4381 |