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Meeting Materials Science & Technology 2020
Symposium Manufacturing and Processing of Advanced Ceramic Materials
Presentation Title Self-bonded Refractories for Investment Casting Mold Manufacture
Author(s) David B. Price
On-Site Speaker (Planned) David B. Price
Abstract Scope Self-Bonded Refractory, Patent #15/795,5573, utilizes a colloidal alumina binder between 72 and 96 % Al2O3. X-ray Diffraction Analysis confirms the binder phase in Self-Bonded Refractory consists of crystalline aluminum oxide, alpha, theta, and kappa phases with minimal amorphous phase, and with not more than 1.2% crystalline silica. Self-Bonded Refractory binder is 25% the volume and 20% of colloidal silica sol and is a fully powder-based refractory system, just add water. Self-Bonded Refractory has a firing range between 1,100 and 1,200 deg. C and Cold Fired MOR of 368 psi, sufficient and suitable for precision metal casting. The green elastic modulus of Self-Bonded Refractory, measured by Dynamic Modulus Analysis (DMA), is 10 times lower compared to colloidal silica-bonded systems. High temperature Creep resistance is 10 times greater with Self-Bonded Refractory, and in contact with Titanium 6Al 4V Self-Bonded Refractory did not show the reaction typical of a colloidal silica-bonded mold.


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A Rational Design of Ultra-uniform Nanocrystalline Materials
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Fabricating Alumina with Heterogeneous Microstructure Using Integrated Additive/Subtractive Manufacturing (IASM)
Fusion Welding of Structural Ceramics
Identifying Multidisciplinary Research Opportunities in Ceramic Processing
Indirect Additive Manufacturing of Ceramics
Investigating the Dependence of Microstructure Evolution in Alumina on the Liquid Phase Chemistry in the CaO-Al2O3-SiO2 System: Densification, Grain Growth and Secondary Phase Formation
Laser Shock Processing of Silicon Carbide Ceramics
Neutrons Guide Materials Design and Synthesis of Functional Oxides
Opportunities for Tailored Grain Boundary Networks in Thermomagnetically Processed Alumina Ceramics
Optimized Etching of Porcelain and Polycrystalline Alumina with a Glass Phase
Processing and Properties of High Thermal Conductive Silicon Nitride Ceramics
Self-bonded Refractories for Investment Casting Mold Manufacture
Synthesis and Flash Sintering of (Hf1-xZrx)B2 Solid Solution Fine Powders
Thermal Stability and Mechanical Properties of High-entropy Carbide Ceramics with Submicron Grain Size Fabricated by Spark Plasma Sintering
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