Porous Composite Ceramic Materials Produced by a Self-Propagating High-Temperature Synthesis in the Fe2O3– Al2O3– Al System

2003 ◽  
Vol 44 (5) ◽  
pp. 343-345 ◽  
Author(s):  
N. P. Tubalov ◽  
O. A. Lebedeva ◽  
V. I. Vereshchagin
Keyword(s):  
High Temperature ◽  
Composite Ceramic ◽  
Ceramic Materials ◽  
Porous Composite ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Composite Ceramic Materials

Porous Hydroxyapatite/Strontium Oxide Composite Ceramic Preparation and Properties of Biomaterials

2019 ◽  
Vol 9 (6) ◽  
pp. 783-788
Author(s):  
Zeng-Dong Meng ◽  
Cheng-Jian Wang ◽  
Yu-Qin Zhang ◽  
Chong Luo ◽  
Ze-Yu Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Bone Repair ◽  
Composite Ceramic ◽  
Ceramic Materials ◽  
Strontium Oxide ◽  
Porous Composite ◽  
Composite Powders ◽  
Pore Characteristics ◽  
Composite Ceramic Materials

Objective: This study aims to added strontium to hydroxyapatite (HA) through physical means and prepare porous composite ceramic materials with good mechanical properties to further improve the osteogenesis-inducing effect of bone repairing materials. Methods: The composite powders of strontium oxide/hydroxyapatite (SrO/HA) was obtained by mechanical milling. Then, porous SrO/HA composite ceramics were prepared by spark plasma sintering. The composition, structure and morphology of these porous composite ceramic materials were characterized using X-ray diffraction and scanning electron microscope, and the porosity and mechanical properties were tested. Results: Porous composite ceramic materials with clear composition were prepared, and obvious porous structures were observed. Conclusion: After ball milling, a replacement reaction occurred in the prepared porous SrO/HA composite powder with different SrO contents, part of Ca2+ in HA (Ca10[PO4]6[OH]2was replaced by Sr2+, and merely a small amount of powder underwent decomposition during sintering at 1,100 °C. Under an electron microscope, the pore characteristics of the composite ceramic materials were obvious, the distribution was uniform, and the connectivity was good. The compressive strengths of these materials ranged within 2–8 MPa. This shows that the strontium element can also be doped by physical means, and that the obtained porous SrO/HA composite ceramic material has good pore characteristics and good application potential in bone repair.

Self-Propagating High-Temperature Synthesis of Dense TiC-TiB2-MeO Ceramics

2006 ◽  
Vol 45 ◽  
pp. 1018-1023
Author(s):  
Vladimir A. Shcherbakov ◽  
Anton V. Phitev ◽  
N.V. Sachkova ◽  
Fabio A. Deorsola ◽  
Dario Vallauri ◽  
...  
Keyword(s):  
High Temperature ◽  
Liquid Phase ◽  
Metal Oxides ◽  
Structure Formation ◽  
Grain Refinement ◽  
Mechanical Characterization ◽  
Ceramic Materials ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Full Densification

The aim of this work is the preparation and study of the mechanisms of structure formation of dense ceramics based on the TiC–TiB2–MeO system obtained by pressure–assisted Self-propagating High-temperature Synthesis. SHS systems were selected on the basis of thermodynamic analysis as suitable to realise regimes of synthesis with formation of liquid phase allowing a full densification. It was observed that at the adiabatic temperature the liquid phase formed in the SHS products consists of either melted oxides or eutectic TiC–TiB2. The results of microstructural observations and mechanical characterization confirm that the metal oxides effectively promote the densification of the final products and the grain refinement of the SHSproduced ceramic materials.

Sign in / Sign up

Export Citation Format

Share Document