Impact/Erosion Resistant Environmental Barrier Coatings (EBCs) for Ceramic Matrix Composites (CMCs)

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-10-C-0231
Agency Tracking Number: N101-036-0942
Amount: $149,694.00
Phase: Phase I
Program: SBIR
Awards Year: 2010
Solicitation Year: 2010
Solicitation Topic Code: N101-036
Solicitation Number: 2010.1
Small Business Information
Directed Vapor Technologies Internationa
2 Boars Head Lane, Charlottesville, VA, 22903
DUNS: 036500804
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Derek Hass
 Director, Research & Deve
 (434) 977-1405
 derekh@directedvapor.com
Business Contact
 Matthew Terry
Title: Manager, Programs & Admin
Phone: (434) 977-1405
Email: mmterry@directedvapor.com
Research Institution
N/A
Abstract
Lightweight silicon-based ceramics are leading candidates to replace heavier nickel-based superalloys for hot section components used in advanced gas turbine engines having increased specific power. Unfortunately, exposures of these materials to the high temperature combustion environments alter the effectiveness of thermally grown silica scales in providing protection from oxidation and component recession during service. Environmental barrier coatings (EBCs) are therefore required that protect the underlying ceramic substrate from environmental attack. Such coatings require good stability in the presence of water vapor, a mechanism for limiting oxygen/water vapor transport and high temperature phase stability. The nature of the silicon-based ceramic recession issue dictates that any EBC system must provide prime reliant performance to ensure full component lifetimes. To meet this goal, it is anticipated that the erosion/impact resistance of the current generation EBC coating systems will need to be enhanced. This has led to interest in advanced thermal/environmental barrier coating(T/EBC) systems having enhanced erosion / impact resistance over current state-of-the-art T/EBC systems. In this work, novel coating synthesis techniques that enable the deposition of T/EBC systems having materials, microstructures and architectures anticipated to promote coating system toughness and improved durability in environments having significant erosion/impact events are investigated.

* information listed above is at the time of submission.

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