About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
High Temperature Oxidation of Metals and Ceramics
|
Presentation Title |
Evaluating the Oxidation Behavior of 1300C Capable Nb-Si-based Alloys |
Author(s) |
Patrick T. Brennan, Rebecca Casey, Chen Shen, Scott Oppenheimer, Bernard Bewlay, Akane Suzuki |
On-Site Speaker (Planned) |
Patrick T. Brennan |
Abstract Scope |
This presentation will cover the efforts to study the oxidation behavior of novel Nb-Si-based alloys strengthened with silicide phases that are being developed for the application of 1300C capable stage 1 turbine blades for land-based power generation gas turbines. The design challenge for developing such a Nb-based alloy is achieving a balance between room temperature fracture toughness, high temperature tensile strength and creep resistance, and resistance to high temperature oxidation. The primary focus of this presentation will be to report how the composition and microstructure of the candidate alloys affects the oxidation mechanisms and the extent of degradation observed in Nb-Si alloys during exposure in air at 800 °C and 1300 °C as well as the trade-offs required to balance environmental stability with desirable mechanical properties in Nb-Si systems. |