1 / 2

High T em perature Oxynitride Coatings Robert J. Lad, University of Maine, DMR 0840045

High T em perature Oxynitride Coatings Robert J. Lad, University of Maine, DMR 0840045 . High temperature wireless microwave acoustic sensor device on a piezoelectric langasite crystal for detection of temperature, pressure, or strain. (courtesy of M. Pereira da Cunha).

thanos
Download Presentation

High T em perature Oxynitride Coatings Robert J. Lad, University of Maine, DMR 0840045

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. High Temperature Oxynitride CoatingsRobert J. Lad, University of Maine, DMR 0840045 High temperature wireless microwave acoustic sensor device on a piezoelectric langasite crystal for detection of temperature, pressure, or strain. (courtesy of M. Pereira da Cunha) Scanning electron microscope image of Pt-Rh/ZrO2interdigital transducers on a microwave acoustic sensor operated at 1000oC with and without a protective SiAlON coating. (courtesy of R. Lad) Outcome: SiAlON and SiZrONoxynitride thin films have been developed for use as protective coatings at temperatures up to 1500oC in corrosive/abrasive environments. Impact: The high temperature oxidation resistance, hardness, and wear resistance of oxynitride coatings will help extend the lifetime of high temperature sensors, turbine engines, aerospace propulsion systems, cutting tools, power plant equipment, and other high temperature structural materials. Explanation: SiAlON films deposited using a RF magnetron sputtering process are amorphous even in service up to 1500oC and exhibit extraordinary wear resistance. SiZrON films are either amorphous or contain nano-sized ZrO2 or ZrN precipitates depending on the exact stoichiometry. Both types of films have high hardness and act as good oxidation diffusion barriers.

  2. High Temperature Oxynitride CoatingsRobert J. Lad, University of Maine, DMR 0840045 Undergraduate student, Bryn Nugent, is a first generation college student and Physics major from Rockport, ME, who characterized oxynitride thin films for her senior thesis project. (courtesy of U.Maine) The project motivation, results, and impacts have been highlighted to several audiences including: Middle school girls in Expanding Your Horizons program Undergraduates enrolled in the NSF NUE Nanotechnology course Teachers participating in the NSF RET sensors program Undergraduates participating in the summer REU program Maine legislators and alumni visiting campus Gifted and talented students from Old Town School High school students participating in the GK-12 program Middle school students participating in UMaine’s Nano-Expo day

More Related