Environmental Effects in Niobium Base Alloys and Other Selected Intermetallic Compounds
Abstract
Niobium aluminides and silicides as well as other intermetallic compounds have potential for use in advanced gas turbines where increased operating temperatures are necessary to obtain the targeted performance goals. These materials will be subjected to a variety of environments over a range of temperatures. Two of the principal reactants in these environments are oxygen and hydrogen. This program is concerned with the effects of oxygen and hydrogen on niobium alloys and other selected intermetallic compounds. This program consists of two parts. The investigations involving oxygen are directed toward describing the conditions which must be achieved in order to have a continuous, protective Aluminum Oxide or Silicon dioxide scale developed on niobium-base alloys and compounds, and other selected intermetallics, at temperatures between 600 and 1400 C. The studies concerned with hydrogen effects are directed toward determining solubility limits, hydrogen uptake and permeation rates, and the degree to which hydrogen degrades the mechanical properties of these materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 1988
- Accession Number
- ADA206072
Entities
People
- A. W. Thompson
- Gerald H. Meier
Organizations
- University of Pittsburgh