Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 2, Pages 2123-2126Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2012.07.048
Keywords
Tape casting; Mechanical properties; Carbides
Categories
Funding
- National Natural Science Foundation of China [50990301, 51072210]
- Shanghai Science and Technology Committee
- State Key Laboratory of High Performance Ceramics and Superfine Microstructures
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An environmental friendly aqueous tape casting process has been introduced to fabricate B4C green tapes. Tetramethylammonium hydroxide (TMAH) and a mixture of waterborne epoxy emulsions and anionic aliphatic urethanes emulsions were selected as the dispersant and binder, respectively. The influence of pH value on the zeta potential of ceramic suspensions has been investigated, and the dispersant content added has been optimized based on the rheological behaviors of B4C slurries. The green sheets showed homogeneous microstructure with high flexibility and enough strength for the subsequent cutting and lamination. After sintering at 2100 degrees C, dense B4C ceramics can be achieved. The relative density and the flexural strength of the sintered samples were 96.8% and 636 +/- 70 MPa, respectively. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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