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Meeting Materials Science & Technology 2020
Symposium Engineering Ceramics: Microstructures, Properties, and Applications
Presentation Title Effect of Hot Forging on The Mechanical and Thermal Properties of Fine-grained SiC-TiC Composite
Author(s) Rohit Malik, Young-Wook Kim
On-Site Speaker (Planned) Rohit Malik
Abstract Scope We herein propose a novel technique of fabricating highly deformable SiC composites. The deformability of brittle SiC ceramics can be improved by reinforcing it with a second phase with low brittle to ductile transition temperature (BDTT), such as TiC (BDTT- 800 C). Fine-grained monolithic SiC and SiC-20 vol% TiC composite were prepared by hot pressing via a two-step liquid phase sintering technique. The hot-pressed SiC-20 vol% TiC composite exhibited two times higher strain than the monolithic SiC after hot forging at 1900 C. High deformation resulted in improved density, mechanical and thermal properties for the SiC-20 vol% TiC composite. The flexural strength, fracture toughness, and thermal conductivity of the hot-pressed SiC-20 vol% TiC composite were 608 MPa, 5.1 MPam1/2, and 34.6 Wm-1K-1, respectively which increased to 777 MPa, 7.8 MPam1/2, and 74.7 Wm-1K-1, respectively after hot forging. The hot-forged composite exhibited anisotropic properties attributed to the anisotropy in the microstructure.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Characterizing the Flexural Strength of Nanocrystalline Ceramics and Associated Challenges
Control of Electrical Conductivity in Liquid-phase Sintered Silicon Carbide Ceramics
Effect of Hot Forging on The Mechanical and Thermal Properties of Fine-grained SiC-TiC Composite
Influence of Three-dimensional Microstructure on the Impact Response of Advanced Ceramics
Introductory Comments: Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
New Insights into Deformation Mechanisms of Amorphous Silicon Nitride Nanoporous Membranes from Atomistic Simulations

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