About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
Oxidation Resistance of Silicon-Boron Coatings on TZM Molybdenum Alloy |
Author(s) |
Miriem Santander Borrego, Chris Wood |
On-Site Speaker (Planned) |
Miriem Santander Borrego |
Abstract Scope |
TZM is a molybdenum-based alloy that finds widespread use in high temperature applications, such as rocket nozzles. Despite its good strength and stiffness properties at high temperatures, TZM is restricted in its applications due to active oxidation at temperatures above 700 °C. Environmental barrier coatings play an important role in permitting the use of TZM at high operating temperatures. The aim of this research was to improve the oxidation resistance of a TZM alloy by application of a silicon-boron (Si-B) coating using a pack cementation technique. Optical microscopy and scanning electron microscopy using energy dispersive spectroscopy of coated and uncoated coupons before and after oxy-acetylene thermal exposure tests revealed the efficacy of the Si-B coating on TZM alloy. The results of this work indicate that compared with the uncoated coupons, the Si-B –coated TZM exhibited less oxidative degradation after three minutes of thermal exposure to a 6 MW/m2 heat flux. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, Characterization, Other |