Results 121 to 130 of about 178 (155)

Gelcasting of Aluminum Nitride Ceramics

Journal of the American Ceramic Society, 2010
Aluminum nitride (AlN) ceramics has been prepared by nonaqueous gelcasting in air and sintering in nitrogen atmosphere. The influence of pH and dispersant on the ζ potential of AlN–ethanol slurry was studied. And the rheological behavior of the slurry was evaluated to optimize the dispersant content and solid
Jianfeng Xue, Manjiang Dong, Jun Li, Guohong Zhou, Shiwei Wang   +4 more
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Gelcasting of Ceramic Bodies

2012
Net-shape and near-net-shape forming techniques have long been appealing in the production of ceramic materials. The high hardness and low toughness of ceramics make post-densification machining both costly and time-consuming, providing strong incentive for the development and optimization of net-shape techniques. The oldest of these forming techniques
Faber, Katherine T., Shanti, Noah O.
openaire   +2 more sources

Gelcasting of Alumina-Spinel Refractories

Key Engineering Materials, 2008
The preparation process of alumina-spinel slurries by using micro-sized alumina-spinel mixtures as raw materials was investigated. The slurries with solids content of 62 vol% and viscosity of 0.3 Pa·s were prepared by adding self-made dispersant ANSP which was a mixture of AN-2000 and STP in mass ratio of 4 to 1.
Kai Qi Liu, Wei Pan, Zheng Kun Fan, Yong Feng Liu, Bing Jun Wang   +4 more
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Gelcasting of Zirconia Using Agarose

Journal of the American Ceramic Society, 2006
Gelcasting of zirconia with agarose as a gelling agent was evaluated, and the rheological behavior of the suspensions was studied. For certain compositions, a viscosity low enough for the suspensions to be processed as well as a sufficient wet green strength to avoid deformation of cast components due to mechanical stresses was ...
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Monomer systems for the gelcasting of foams

Journal of the European Ceramic Society, 2002
The association of the gelcasting process with the aeration of ceramic suspensions allowed the development of a novel category of porous ceramics with unprecedented mechanical properties. One of the critical points in the processing of porous ceramics by this route involves the setting of the foams, which is based on a gelling reaction by the in situ ...
F.S Ortega, P Sepulveda, V.C Pandolfelli
openaire   +1 more source

Production of yttria ceramics by gelcasting

2011
The production of yttria ceramics by green-gelcasting technique was developed through: (1) optimization of aqueous yttria slurries; (2) optimization of the gelcasting process; (3) thermal treatments and characterization of the final microstructures. Different dispersants were tested. Zeta potential characterization of the dispersed state was performed.
Alex Sangiorgi, Anna Luisa Costa, Paola Pinasco, Alessandra Sanson, Barbara Ballarin   +4 more
openaire   +3 more sources

Gelcasting of porous titanium implants

Powder Metallurgy, 2008
Porous titanium implants with large size and complex shape were successfully fabricated by a novel near net forming process, gelcasting, and the effects of processing parameters on the viscosity of...
Y. Li, Z. M. Guo, J. J. Hao, S. B. Ren
openaire   +1 more source

NiCuZn ferrite cores by gelcasting: Processing and properties

2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016
We used gelcasting, a pressure-less processing technology for fabricating ceramic parts, to make NiCuZn ferrite cores, which are traditionally made by a process that requires high hydrostatic pressure. A commercial NiCuZn ferrite powder was mixed with water, dispersant, and organic monomers to form a slurry, and then cast it into a mold of toroid shape
Lanbing Liu, Yi Yan, Khai D. T. Ngo, Guo-Quan Lu   +3 more
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Forming Textured Microstructures via the Gelcasting Technique

Journal of the American Ceramic Society, 1997
Crystallographically textured samples of iron titanate were produced by gelcasting in the presence of a strong magnetic field. Texture was assessed by measuring X‐ray pole figures on samples that were cast in different orientations relative to the applied field. Specimens in this study exhibit fiber‐type texture, with the
Zimmerman, Michael H., Faber, K. T., Fuller, Edwin R., Jr.   +2 more
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Thermoreversible Gelcasting: A Novel Ceramic Processing Technique

Journal of the American Ceramic Society, 2002
A new ceramic processing method, thermoreversible gelcasting (TRG), has been developed. The method uses a gelation process that can be reversed multiple times. Two Al 2 O 3 systems have been explored with the use of a specific triblock copolymer to form
Montgomery, John K., Drzal, Peter L., Shull, Kenneth R., Faber, K. T.   +3 more
openaire   +2 more sources