The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Pest Reactions in Intermetallic Compounds II. Investigations on NiAl, and Two MoSi2 Structures

Report Number: ASD-TDR-63-309 Part II
Author: Syebolt, A. U.
Author: Westbrook, J. H.
Corporate Author: General Electric Research Labpratory
Laboratory: Directorate of Materials and Processes
Date of Publication: 1964-04
Pages: 38
Contract: AF 33(657)-7980
Project: 7350
Task: 735001
AD Number: AD0439216

The grain boundary hardening phenomena investigated earlier in the case of the intermetallic compound NiGa have been found to occur in much the same manner in NiAl. As before, an oxygencontamination heat treatment followed by a sufficiently high temperature quench shows no hardening, but subsequent lower temperature aging sets up hardening. Hardening occurs in the bulk as well as along grain boundaries, but generally the effect is harder to observe in the former case because of shallow oxygen penetration in the bulk as compared to the grain boundaries. A vacancy-oxygen atom interaction model is suggested as a likely explanation for the observed hardening. Some observations have been made on pest failure in MoSi2, and grain boundary hardening in the structural analog CrAl2. It is difficult to find suitable experimental techniques to study the pest failure of MoSi2. As-cast material is more susceptible to pest failure than MoSi2 coatings on molybdenum sheet.

This report has yet to be scanned by Contrails staff

Request scanning of this report

Other options for obtaining this report

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a full-image download of the report, exists at DTIC

Via National Technical Information Service:
This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
The inside cover of this report indicates that it was released for public sale