|About this Abstract
||MS&T21: Materials Science & Technology
||Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
||Nanocrystalline Refractory Ceramic Synthesis Using High Char Polymers
||Matthew Laskoski, Boris Dyatkin, Tristan Butler
|On-Site Speaker (Planned)
Ultra-high temperature ceramics (UHTCs) demonstrate significant promise in many high performance applications. However, existing processing typically produce macrocrystalline ceramics that are too brittle and expensive to incorporate into aerospace and military systems. Our approach produces dense, nanocrystalline, monolithic UHTC composites with precursor flexibility that can maximize density while altering hardness, and durability under high temperatures. This process is based on a novel synthesis route using compressed powder mixtures of metal precursors and high char-yielding that yield shaped carbides, nitrides, and borides under mild heat treatment. Incorporation of various metals, fibers, and ceramics into these composites can improve their mechanical, electrical, and thermal properties and adapt them for many emerging applications.