Preparation of porous Al 2 O 3 ceramics with enhanced properties by SLS using Al 2 O 3 poly-hollow microspheres (PHMs) coated with CaSiO 3 sintering additive
Ceramics International, ISSN: 0272-8842, Vol: 46, Issue: 17, Page: 26888-26894
2020
- 40Citations
- 19Captures
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Article Description
The mechanical properties of porous ceramics prepared by poly-hollow microspheres (PHMs) is usually low because of the weak bonding between different ceramic PHMs. In this paper, CaSiO 3 were coated to the surface of Al 2 O 3 PHMs through co-precipitation method as sintering additive to improve the properties of Al 2 O 3 poly-hollow microsphere ceramics (Al 2 O 3 PHM ceramics). The influence of different amount of CaCl 2 solution on properties of the Al 2 O 3 PHM ceramics such as phase composition, microstructure, porosity and mechanical properties were studied. The porosity of the Al 2 O 3 PHM ceramics decreased from 77.03% to 68.16% with the increase of CaCl 2 solution amount, while compressive strength increased 29 times from 0.29 MPa to 8.39 MPa. The addition of the CaSiO 3 could decrease the sintering temperature of Al 2 O 3 PHM ceramics and significantly improve the mechanical properties of Al 2 O 3 PHM ceramics, which is beneficial for preparing highly porous Al 2 O 3 PHM ceramics with high mechanical properties and complex shapes.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0272884220321787; http://dx.doi.org/10.1016/j.ceramint.2020.07.165; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85088938683&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0272884220321787; https://dx.doi.org/10.1016/j.ceramint.2020.07.165
Elsevier BV
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