About this Abstract |
Meeting |
6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
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Symposium
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6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
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Presentation Title |
CALPHAD-Guided Alloy Design and Processing Approach for Strong and Tough Titanium Boride Based Ceramics & Composites |
Author(s) |
K. S. Ravi Chandran, Jun Du, Ahmed Deghna |
On-Site Speaker (Planned) |
K. S. Ravi Chandran |
Abstract Scope |
A CALPHAD-guided alloy design strategy is used to design titanium boride (TiB) based ceramics and metal matrix composites. The CALPHAD approach is used (i) in finding the desirable low temperature reaction sintering conditions and (ii) enabling the formation of ductile beta-titanium phase in the microstructure for improved strength and toughness. The SPS sintering and densification of a high strength and high toughness TiB-beta-Ti ceramic (~85% TiB and 15% beta-Ti phase) was completed at a relatively low temperature. The best TiB ceramic composition possesses a very good combination of high average flexure strength (~900 MPa) and high average fracture toughness (~ 9 MPa√m) making it competitive with some of the strong and tough ceramics. Metal matrix composites with a flexure strength of 1622 MPa and fracture toughness of 23 MPa√m were also designed with excellent combination of properties. The microstructural factors that control the strength and toughness are discussed.
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Proceedings Inclusion? |
Definite: Other |