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Advanced Materials for Harsh Environments: Poster Session
Sponsored by: ACerS Electronics Division
Program Organizers: Navin Manjooran, Solve; Gary Pickrell, Virginia Tech

Tuesday 12:00 PM
October 19, 2021
Room: Exhibit Hall B
Location: Greater Columbus Convention Center

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P2-16: Development of Porous Silicon Nitride for Hypersonic RF Window Applications: Averyonna Kimery¹; ¹Purdue University
    Radomes protect the antenna from the harsh environment encountered when flying at hypersonic speeds. The radome material must have a low dielectric constant and loss so as not to attenuate GHz radar waves. Silicon nitride is being considered as a radome material because it meets these criteria; it also has high mechanical strength and toughness, low coefficient of thermal expansion, and good thermal shock resistance. The A-sandwich design is a common broadband radome design. It is constructed with a porous core and dense skins on each side of the core. In this work, fabrication of a silicon nitride porous core using various methods, including extrusion concepts and pore forming agents, will be discussed.

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