期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 102, 期 9, 页码 5082-5089出版社
WILEY
DOI: 10.1111/jace.16403
关键词
chemical vapor infiltration; fibers; whiskers
资金
- Fundamental Research Funds for the Central Universities [3102017jg02001, 3102018jcc002]
- National Program for Support of Top-notch Young Professionals
- National Natural Science Foundation of China [51272210, 50902112, 51772246, U1737209]
- Program for New Century Excellent Talents in University [NCET-13-0474]
Ceramic is a typical brittle-essence material, which makes the low strength a fatal problem for ultra-light ceramic lattices with ultra-high porosity. In this study, ultra-light ceramic lattices with calculated density of ca. 0.8g/cm(3) and porosity up to ca. 80% reaching maximum compressive strength of 107MPa were successfully printed by a three-dimensional (3D) printing technology stereolithography. Ultra-high-specific strength of the printed ceramic lattices (32Nm/g) was even much higher than that of the steel lattices (2Nm/g) (Int J Mach Tool Manuf, 62, 2012, 32). Short-cut quartz fibers and in situ growing Si3N4 whiskers were introduced as reinforcements to improve the strength of the printed lattices. Compressive strengths of the ceramic lattices improved by 2.8 and 3.6 times stronger than the originals, respectively. Significantly, energy absorption of the ceramic lattices under compression reached over 10 times larger than before. In comparison with the originals, micronano reinforcements significantly improved the compressive properties of the lattices with microsupporting structures and network formed in internal pores while maintaining the ultra-light structure.
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