Results 31 to 40 of about 178 (155)

Elimination of the Stray Grain Defects of Single Crystal Blade by Variable Wall Thickness Based on Integral Ceramic Mold

Metals, 2022
The stray grain defect is often found at the platform in the process of directional solidification of single crystal blades because local undercooling easily occurs in this area.
Zhefeng Liu, Kai Miao, Weibo Lian, Zhongliang Lu, Dichen Li   +4 more
doaj   +1 more source

Gelcasting of Carbide Ceramics

Key Engineering Materials, 2008
In this paper, the aqueous gelcasting of carbide ceramics (SiC, TiC, and B4C) were studied systematically. N, N-dimethyl acrylamide (DMAA) and N, N’-methylenebisacrylamide (MBAM) are used as organic monomer and cross-linker respectively. The initiator was selected from ammonium persulfate (APS) and 2, 2’-azobis[2-(imidazolin-2-yl) propane ...
openaire   +3 more sources

Espumas vítreas do sistema Li2O-ZrO2-SiO2-Al2O 3 produzidas pelo processo gelcasting Li2O-ZrO2-SiO2 -Al2O3 glass-ceramic foams produced by the gelcasting process

Cerâmica, 2009
Espumas vítreas do sistema Li2O-ZrO2-SiO2-Al2O 3 (LZSA) foram produzidas pelo processo gelcasting, associado à aeração de suspensões cerâmicas, sem controle atmosférico. Por meio da adição de diferentes concentrações de agente espumante (Fongraminox) foi
E. de Sousa, C. R. Rambo, F. S. Ortega, A. P. N. de Oliveira, V. C. Pandolfelli   +4 more
doaj   +1 more source

Reologia, cinética de polimerização e resistência mecânica de sistemas para a produção de espumas cerâmicas via "Gelcasting"

Cerâmica, 2001
A associação da aeração de suspensões cerâmicas contendo um agente espumante ao processo "gelcasting" possibilitou o desenvolvimento de uma nova classe de cerâmicas porosas com propriedades sem precedentes. Um dos pontos mais importantes deste processo é
F. S. Ortega, P. Sepulveda, V. C. Pandolfelli   +2 more
doaj   +1 more source

Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration

Journal of Advanced Ceramics, 2021
Silicon nitride foams with a hierarchical porous structure was formed by the combination of protein-based gelcasting, chemical vapor infiltration, and in-situ growth of silicon nitride nanowires.
Junsheng Li, Qiuping Yu, Duan Li, Liang Zeng, Shitao Gao   +4 more
doaj   +1 more source

Thermal degradation mechanism and kinetics of aluminum-copper green bodies prepared by gelcasting

工程科学学报, 2016
Aluminum-copper green bodies were successfully prepared by a non-aqueous gelcasting system. Scanning electron microscopy observations showed that the powder particles were completely wrapped by the polymer before degreasing,and the polymer in the metal ...
YUAN Hai-ying, JIA Cheng-chang, ZHANG Xin-xin, Bekouche Karima, WANG Zhao-li   +4 more
doaj   +1 more source

Chemo-Rheological Behavior of Aqueous Titanium Carbide Suspension and Evaluation of the Gelcasted Green Body Properties [PDF]

Materials Research, 2016
Gel-casting is an advanced colloidal processing method for fabricating ceramic green parts. In this project acrylamide-based monomers were used as a gelcasting system.
Hamze Foratirad, Hamid Reza Baharvandi, Mohammad Ghanadi Maragheh   +2 more
doaj   +1 more source

Influence of the acrylamide-based monomer on the sintering of ceramics shaped by gelcasting

Open Ceramics, 2023
Alumina ceramics were prepared by gelcasting, based on an in-situ polymerization that promotes the formation of homogeneous green ceramic parts and allows the preparation of complex shapes and/or large-size ceramics.
Laurie Gaüzère, Clémence Besnard, Maël Pontoreau, Stéphane Carlotti, Samuel Couillaud, Jean-Marc Heintz   +5 more
doaj   +1 more source

Relação entre porosidade e os módulos elásticos de esponjas cerâmicas produzidas via "gelcasting" The relation between porosity and elastic moduli of gelcast ceramic foams

Cerâmica, 2004
A técnica "gelcasting", associada à aeração de suspensões cerâmicas, permite a produção de esponjas cerâmicas com uma larga faixa de porosidade. Esponjas à base de alumina foram produzidas com porosidade variando de 62 a 87 %-vol, o que corresponde a ...
J. A. Rodrigues, F. S. Ortega, A. E. M. Paiva, E. L. G. Villaboim, V. C. Pandolfelli   +4 more
doaj   +1 more source

Effect of Sintering Temperature on the Microstructure Behavior of Gelcasted Porous Ceramics Using Cassava Starch as Pore Template

Indonesian Journal of Chemistry, 2023
The gelcasting technique was employed to fabricate porous ceramics utilizing kaolinite clay as the base material with a combination of 20 wt.% cassava starch. The utilization of cassava starch as a pore-template material is a sustainable and eco-friendly
Suriati Eka Putri, Diana Eka Pratiwi, Rachmat Triandi Tjahjanto, Nita Magfirah Ilyas, Dahlang Tahir, Abd Rahman, Heryanto Heryanto   +6 more
doaj   +1 more source