期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 40, 期 14, 页码 4825-4836出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2019.11.047
关键词
Stereolithography; Aluminum oxide; Sintering temperature; Vacuum; Ceramic cores
资金
- National Key Research and Development Program of China [2018YFB1106600]
- Chinese National Foundation for Natural Sciences [51672217]
Stereolithography (SL) was used to form alumina ceramic cores. The effect of sintering temperature on the microstructure and mechanical properties of the alumina ceramics are investigated, which were sintered in vacuum. The results indicate that, as the sintering temperature increased the particle size of alumina slightly increased, and the interlayer spacing first decreased and then increased. The open porosity of alumina ceramics significantly decreased as the sintering temperature in vacuum increased. The flexural strength and hardness increased as the sintering temperature increased. When sintered at 1150 degrees C, the flexural strength was found to be 33.7 MPa, the shrinkage was 2.3 %, 2.4 %, and 5.3 % in the X, Y, and Z directions, respectively, and the open porosity was 37.9 %. These results are similar to those found from sintering at 1280 degrees C in air.
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