Accession Number:

AD0701547

Title:

THE MECHANISM OF JOINT FORMATION IN SOLID-STATE WELDING OF ALUMINUM OXIDE CERAMICS WITH NIOBIUM (O Mekhanizme Obrazovaniya Soedineniya pri Svarke v Tverdom Sostoyanii Keramiki iz Okisi Alyuminiya s Niobiem),

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

• Karakozov,E. S.
• Kotelkin ,A. S.
• Matveev,G. M.
• Merkulov,V. A.
• Shorshorov,M. Kh.

Report Date:

1970-02-17

Pagination or Media Count:

14.0

Abstract:

The kinetics of the process of joint formation in solid-state welding of Al2O3 ceramic to niobium was investigated. Calculations of the time of development of physical contact in welding Al2O3 and niobium, based on the conditions necessary to obtain a required creep rate, showed that total physical contact is formed with a temperature of 1500C, a pressure of 1.5 kgsqmm and a time of 1000 sec. Thermodynamic calculations of the interaction of aluminum oxide with niobium pentoxide indicate the possible formation of a chemical bond at 1500C. The possibility of joining Al2O3 ceramic to niobium, using the calculated parameters, was proven by experiment. Author

Descriptors:

• (*ALUMINA
• *WELDING)
• NIOBIUM
• WELDS
• CERAMIC MATERIALS
• THERMODYNAMICS
• OXIDES
• USSR

Subject Categories:

• Ceramics, Refractories and Glass
• Fabrication Metallurgy
• Couplers, Fasteners and Joints

Distribution Statement:

APPROVED FOR PUBLIC RELEASE