POLARIS MATERIALS PROGRAM. I. LITERATURE SURVEY. II. THERMAL AND MECHANICAL PROPERTIES OF CERAMICS, CERMETS AND METALS
Abstracts of literature and trip reports and data sheets on the thermal and mechanical properties of ceramics and metals in conjunction with the POLARIS Materials Program are given. (auth) l6987 Reactions between coating materials were studied by pressing powdered materials into pellets and firing them in contact with beryllia disks. Coatings were prepared by wet spraying milled mixtures of the coating materials on beryllia. Firing was done in a pprcelain muffle tube with controlled atmospheres of hydrogen or helium. A chromium- alumina coating was developed. A prolonged test at 2500 deg F 11370 deg C) revealed excessive weight loss. Silica was found to react violently with beryllia to give a bloated structure. Titanium-zirconia coating had excellent structure, but penetrated into the beryllia. Wetting of beryllia by titanium was produced by firing a titanium pellet on a beryllia disk in a helium atmosphere. The titanium reduced the beryllia at the contact surface, and a third phase formed near the interface in the titanium. This reaction led to the development of a chromium-alumina coating with small titanium additions, which gave the most promising results. (auth)
- Research Organization:
- Naval Ordnance Lab., White Oak, Md.
- NSA Number:
- NSA-13-016986
- OSTI ID:
- 4247314
- Report Number(s):
- NAVORD-6056
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- United States
- Language:
- English
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