THIS GRANT IS A CONTINUATION OF N00014-11-1-0601 Hot Corrosion of SiC-Based Ceramic Matrix Composites
Abstract
These funds are Dr. Elizabeth Opila. The proposed research approach is to characterize Na2SO4-induced hot corrosion behavior of BNcoated SiC coupons as a model for SiC/BN/SiC CMCs. The time and temperature dependence of BN-coated SiC coupon hot corrosion will be compared to previous results obtained for uncoated SiC coupons. Corrosion rates will be characterized by weight change of the coupons, substrate pitting, and the amount and chemistry of the corrosion products formed as determined by Inductively Coupled Plasma - Optical Emission Spectroscopy. Hot corrosion rates of BN-coated and uncoated SiC will also be determined as a function of SO2(g) pressure. These results, in combination with electrochemical studies for the solubility of SiO2 and B2O3 in Na2SO4 as afunction of activity of Na2O, will be used to determine critical sulfur levels for basic dissolution and rapid hot corrosion of SiC and BN. The amorphous or crystalline nature of corrosion products will be determined and correlated with hot corrosion behavior. Further hotcorrosion studies of relevant fiber and matrix materials will be conducted to identify constituents that are particularly resistant or prone to hot corrosion.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141612387
Entities
People
- Elizabeth Opila
Organizations
- Office of Naval Research
- United States Navy
- University of Virginia