Session: 02-03 Mechanical Behavior of Ceramic Matrix Composites and Protective Coatings

Paper Number: 151279

Investigating Synergistic Effect of Double-Sided Solid Particle Erosion on Oxide/Oxide Ceramic Matrix Composites at Elevated Temperature 

This study investigates the erosion behavior of oxide/oxide ceramic matrix composites (Ox/Ox CMCs) under varying thermo-mechanical conditions, including erosion-only, erosion-fatigue, and erosion-creep. Single and double-sided impacts were made at temperatures of 800°C and 1200°C, with particle velocities of 200 m/s and 350 m/s. Optical microscopy with 3D depth scanning was used to assess the extent of erosion damage, followed by room temperature tension tests to evaluate the remaining strength of eroded specimens. The objective was to assess the combined influence of stress, temperature and velocity on erosion behavior and remaining strength of the Ox/Ox composites. The results showed linear increase in cumulative mass loss for all specimens, with specimens with erosion under stress exhibiting higher erosion rates compared to specimens with erosion only conditions. The combined influence of stress during erosion had a minimal effect on the residual strength, as the erosion process itself was the primary driver of material degradation. On the other hand, double-sided impacts distributed damage more uniformly across the material, mitigating the effects of eccentricity and resulting in a slight increase in net-section stress. This suggests that while erosion with stress has a limited direct impact on strength degradation, erosion by itself is the predominant factor influencing material degradation in high-temperature erosion conditions.

Keywords: High Temperature solid particle erosion, Oxide/Oxide CMC, Fatigue, Creep.

Presenting Author: Gregory Morscher The University of Akron

Presenting Author Biography: Dr. Morscher has worked in the area of high temperature materials and composites for over twenty years. Before joining the University of Akron, he was previously affiliated with NASA Glenn (formerly Lewis) research center as a research engineer (CWRU) and then senior research scientist (OAI). Dr. Morscher has authored or coauthored over 90 publications in refereed journals or proceedings and has been a frequent contributor to NASA Glenn’s annual Research and Technology Reports. He has received several OAI achievement awards, two NASA Tech Brief awards, two NASA Turning Goals into Reality awards, the 2004 NASA Public Service Medal and the Richard M. Fulrath Award from the American Ceramic Society in 2005.

Authors:

Farhan Mirza The University of Akron
Jonathan Clawson The University of Akron
Ragav Panakarajupally The University Of Akron
Gregory Morscher The University of Akron
Harsh Baid Alphastar Corporation
Sung Choi Naval Air Warfare Center-Aircraft Division (NAWCAD)