Fibrous ZrO2-mullite porous ceramics fabricated by a hydratable alumina based aqueous gel-casting process

2019 ◽  
Vol 45 (7) ◽  
pp. 8824-8831 ◽  
Author(s):  
Lei Yuan ◽  
Zhenli Liu ◽  
Xinghui Hou ◽  
Zongquan Liu ◽  
Qiang Zhu ◽  
...  
Keyword(s):  
Casting Process ◽  
Porous Ceramics ◽  
Gel Casting ◽  
Hydratable Alumina

Fabrication and properties of mullite fiber matrix porous ceramics by a TBA-based gel-casting process

2013 ◽  
Vol 33 (4) ◽  
pp. 717-725 ◽  
Author(s):  
Zhenguang Hou ◽  
Haiyan Du ◽  
Jiachen Liu ◽  
Ruihua Hao ◽  
Xue Dong ◽  
...  
Keyword(s):  
Casting Process ◽  
Porous Ceramics ◽  
Gel Casting ◽  
Mullite Fiber ◽  
Fiber Matrix

Mechanical Characterization of Hydroxiapatite Micro/Macro-Porous Ceramics Obtained by Means of Innovative Gel-Casting Process

2009 ◽  
Vol 417-418 ◽  
pp. 565-568 ◽  
Author(s):  
Paolo Marcassoli ◽  
Marina Cabrini ◽  
Jacopo Tirillò ◽  
Cecilia Bartuli ◽  
Paola Palmero ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Mechanical Characterization ◽  
Casting Process ◽  
Maximum Size ◽  
Porous Ceramics ◽  
Critical Stress Intensity Factor ◽  
Gel Casting ◽  
Tissue Reconstruction ◽  
Mechanical Investigation

An innovative gel-casting process was developed in order to obtain macro porous ceramics scaffolds of hydroxyapatite to be used in regenerative medicine for bone tissue reconstruction. Mechanical investigation was carried out on different formulations of dense hydroxyapatite samples in order to evaluate the effect of the gel casting process parameters on the density, the elastic modulus, the tensile and the compressive strength. The fracture critical stress intensity factor (KIC) was also evaluated by means of microhardness measurements. The correlations between KIC and tensile and compressive strength were examined taking into account the average and maximum size of porosity. The mechanical properties of macro and micro-porous HA are in agreement with the model of Gibson and Ashby.

Preparation of MgO–Y2O3 Composite Ceramic by Aqueous Gel Casting

2021 ◽  
Vol 16 (3) ◽  
pp. 444-451
Author(s):  
Liangwen Liu ◽  
Mu Zhang ◽  
Xing’an Wang ◽  
Xudong Sun
Keyword(s):  
Casting Process ◽  
Composite Ceramic ◽  
Ethanol Solution ◽  
Zeta Potentials ◽  
Gel Casting ◽  
Modification Process ◽  
Die Pressing ◽  
Ft Ir ◽  
Temperature And Pressure ◽  
Better Than

MgO–Y2O3 composite ceramics were prepared by gel-casting technology. The surface of MgO powder is passivated with H3PO4 ethanol solution. The treated powder can be dispersed in water with a dispersant. The powder surface modification process was verified by pH, Zeta potentials, Fourier transmission infrared absorption spectroscopy (FT-IR), the absorbance of suspension and rheological properties. The obtained stable suspensions were gel cast, dried, and sintered at 1400 °C for 30 min under 35 MPa. As a comparison, the powder was compressed by die pressing and sintered at the same temperature and pressure. After sintering, the MgO–Y2O3 composite ceramic with a theoretical density of 97.29% can be prepared by aqueous gel casting process. The properties of MgO–Y2O3 composite ceramic fabricated by gel casting are better than die pressing.

Sintering behavior and electrical conductivity of Ce0.9Gd0.1O1.95 powder prepared by the gel-casting process

2003 ◽  
Vol 78 (3) ◽  
pp. 791-795 ◽  
Author(s):  
Ji-Gui Cheng ◽  
Shao-Wu Zha ◽  
Jia Huang ◽  
Xing-Qin Liu ◽  
Guang-Yao Meng
Keyword(s):  
Electrical Conductivity ◽  
Casting Process ◽  
Sintering Behavior ◽  
Gel Casting

Microstructure and mechanical properties of hydroxyapatite obtained by gel-casting process

2008 ◽  
Vol 34 (2) ◽  
pp. 359-364 ◽  
Author(s):  
Biqin Chen ◽  
Tao Zhang ◽  
Jingxian Zhang ◽  
Qingling Lin ◽  
Dongliang Jiang
Keyword(s):  
Mechanical Properties ◽  
Casting Process ◽  
Gel Casting ◽  
Microstructure And Mechanical Properties

Preparation, Microstructure and Properties of ZrO2 Gradient Porous Ceramics by Freeze-Casting Process

2015 ◽  
Vol 816 ◽  
pp. 226-230 ◽  
Author(s):  
Tao Tao Ai
Keyword(s):  
Electron Microscopy ◽  
Compressive Strength ◽  
Porous Structure ◽  
Cross Section ◽  
Lamellar Structure ◽  
Sintering Temperature ◽  
Casting Process ◽  
Porous Ceramics ◽  
Freeze Casting ◽  
Scanning Electron

The ZrO2gradient porous ceramics were prepared by a novel freeze-casting process. The porous structure of the ZrO2ceramics was investigated by scanning electron microscopy (SEM). And the porosity and compressive strength were also measured. Experimental results indicated that the porous structure of the specimens was remarkably affected by the sintering temperature. The dendritic pores were obtained after sintered at 1300 °C. The porosity and compressive strength of the specimen were 56.79% and 4.37 MPa, respectively. As the sintering temperature reached to 1500 °C, a lamellar structure was obtained on the cross-section of the specimen. Meanwhile, the porosity decreased to 26.77% and the compressive strength increased to 8.26 MPa. The ceramics can be divided subsequently into three distinctive zones along the solidification direction, i.e. lamellar zone, transition zone and cellular zone.

Analysis and Evaluation of Different Influencing Factors in Processing of Hollow and Full Beads by Alginate Gelation Based on Zirconia and TRIP Steel

2015 ◽  
Vol 825-826 ◽  
pp. 158-166
Author(s):  
Marie Oppelt ◽  
Christos G. Aneziris
Keyword(s):  
Casting Process ◽  
Steel Powder ◽  
Composite Bead ◽  
Analysis And Evaluation ◽  
Metastable Austenitic Steel ◽  
Gel Casting ◽  
Innovative Process ◽  
Hollow Space ◽  
Sodium And Potassium ◽  
Hollow Metal

A novel and innovative process for full as well as hollow metal-matrix composite bead fabrication using gel-casting process by alginate gelation is investigated. In particular the influence of four different alginates and various solidifying agents have been investigated regarding the formation and stability of full and hollow beads. The suspension contained a metastable austenitic steel powder (16Cr7Mn3Ni) and zirconia particles as well as different alginates and was added dropwise into water containing different solidifying agents for forming beads. With the aid of sodium and potassium alginate dropped in solution with CaCl2, full metal beads have been obtained. Hollow beads have been produced using potassium alginate and Ca (OH)2 as solidifying agent and show a hollow space fraction of 65%. At lower strains (up to 15 %), all zirconia reinforced full steel beads obtain higher specific energy absorption (SEA) in comparison to pure steel beads.

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