Some Soldering Questions of Refractory Metals,

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Abstract:

One of the difficulties when soldering molybdenum with oxidized copper by silver solder is the oxidation of the molybdenum and the failure of wetting. The reason for oxidation is the transfer of oxygen from the copper to the surface of the molybdenum, which is confirmed by calculation. The effective means combating the oxidation of the molybdenum is the utilization of a copper foil layer, which creates an obstacle for oxygen transfer and completely eliminates oxidation. When soldering porous metals, especially tungsten, the selection of a soldier should be made considering the strength of its interaction with the material of a porous body. Preliminary calculations in the proposed simplified scheme made it possible to shorten the labor input of experimental operations. A comparison of zirconium and titanium with respect to the time necessary for the crystallization of the soldier in the capillaries of porous tungsten indicated the obvious advantages of titanium. Author

Author(s):
Dolgov, Yu. S.
Author Organization(s):
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Supplementary Note:
Edited machine trans. of Moskovskoe Vysshee Tekhnicheskoe Uchilishche. Trudy (USSR) n132 p187-198 1969, by Rene Courville.
Annotation:
Some Soldering Questions of Refractory Metals--Translation.
Pagination:
0023

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
FTD-MT-24-752-71
Project Number(s):
FTD-50108
 Subject Terms
Communities of Interest:
Human Systems
Descriptor(s):
(*SOLDERING, REFRACTORY METALS), SOLDERING ALLOYS, COPPER, OXIDATION, POROUS METALS, STAINLESS STEEL, MOLYBDENUM, TUNGSTEN, NIOBIUM, USSR
Field(s)/Group(s):
Fabrication Metallurgy
Keyword(s):
TRANSLATIONS
Report Date:
1971 Jul 27