Investigation of High-Temperature Oxidation Reactions.
Abstract
In this research, high temperature oxidation reactions were studied, with detailed experimental investigation of two problems: (1) the compatibility of components in multi-phase, high temperature systems as exemplified by displacement reactions in the solid state, and (2) the high temperature oxidation of Ni-Cr-W and Co-Cr-W alloys. From a knowledge of the pertinent thermodynamic exemplified by displacement and (2) the high temperature oxidation of Ni-Cr-W reactions in the solid state, and Co-Cr-W alloys. From a knowledge of the pertinent thermodynamic and transport parameters of the reaction couples (Nickel/Cuprous Oxide, Cobalt/Cuprous Oxide, Iron/Cuprous Oxide, and Iron/Nickel Oxide), the selection of the product morphologies and the resulting kinetics of reaction were predicted and compared with experiment. A detailed theory was presented and tested to interpret the aggregate-lamellar product microstructure of the Iron/Cuprous Oxide couple. The effect of tungsten additions on the oxidation behavior of Nickel-20 Chromium alloys and of Cobalt-30 Chromium alloys was studied by thermogravimetric, electron microprobe, and metallographic methods. For each set of alloys a partitioning of W to the metallic phase was found, and the resulting phase changes were interpreted in terms of the ternary phase diagrams for the alloys.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1974
- Accession Number
- ADA004169
Entities
People
- John P. Hirth
- Robert A. Rapp
Organizations
- Ohio State University