RESEARCH ON TANTALUM AND MOLYBDENUM BRAZING TECHNIQUES. Quarterly Progress Report NOR-63-178
A literature survey was conducted which indicated that: no completely satisfactory conventional or high remelt temperature braze systems were developed for molybdenum and tantalum, the diffusion sink and reactive brazing concepts offer the most potential for increasing joint remelt temperatures, titanium-base alloys offer the most promise for molybdenum and tantalum diffusion sink braze alloys, andd niobium-base alloys offer the most promise for conventional brazing of tantalum. A number of diffusion sink braze alloys were developed and will be evaluated on the joints. The molybdenum braze alloys are: Zr-25Ti-32V, Ti--8Ni-- 7Si, Ti--25Cr-- 10Ni, andd Zr-34Ti-33V. The tantalum braze alloys are: Zr-25Ti-- 32V, Ti-- 27V -7Fe, Ti-- 29V-2Si, Ti- 28Zr -- 16Mo- 10Ta, and Ti-21.5V 1.5Si-- 25Ta. These braze alloys will utilize diffusion sink additions of molybdenum and/ or tantalum. Reactive brazing will incorporate additions of carbon and/or boron. The Nb--25V and Nb--30Ti alloys were selected for conventional brazing of tantalum. Pre-braze cleaning procedures for tantalum and molybdenum were selected and their applicability verified experimentally. Methods were developed for placing diffusion sink powders at fillet and node areas on honeycomb specimens. (auth)
- Research Organization:
- Northrop Norair. Div. of Northrop Corp., Hawthorne, Calif.
- NSA Number:
- NSA-18-000549
- OSTI ID:
- 4171812
- Report Number(s):
- NP-13241
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BORON
BRAZING
CARBON
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CLEANING
CONFIGURATION
DIFFUSION
HONEYCOMB
IRON ALLOYS
JOINTS
MATERIALS TESTING
MECHANICAL STRUCTURES
MELTING
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM
NICKEL ALLOYS
NIOBIUM ALLOYS
POWDERS
SILICIDES
SURFACES
TANTALUM
TANTALUM ALLOYS
TEMPERATURE
TITANIUM ALLOYS
USES
VANADIUM ALLOYS
ZIRCONIUM ALLOYS