Phase Studies in BeO-Metal Oxide Systems Using a Porous-Collector Technique
The phase relations in high-temperature BeO-- metal oxide systems were investigated by means of a porouscollector technique. In this technique, which was found to be applicable to simple eutectic oxide systems with fluid melts, the liquid formed during heating of a wafer-shaped specimen was absorbed in a porous collector. The lowest temperature at which the liquid formed and the material balance were used to establish the eutectic temperature and composition. The eutectics in four binary systems were determined as (1) ZrO/sub 2/-- BeO, 2045 plus or minus 10 deg C, 59 plus or minus 2 mole% BeO, (2) CeO/sub 2/--BeO, 1890 plus or minus 20 deg C, 63 plus or minus 3 mole% BeO, (3) MgO-- BeO, 1860 plus or minus 10 deg C, 69 plus or minus 2 mole% BeO, and (4) MgO-- ZrO/ sub 2/, 2080 plus or minus 10 deg C, 65 plus or minus 3 mole% MgO. Experiments in the ternary system MgO-- ZrO/sub 2/-- BeO indicated an extensive region of solid solubility in the ZrO/sub 2/-rich portion of the system and a eutectic plane at 1720 plus or minus 10 deg C. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-027833
- OSTI ID:
- 4687448
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 4 Vol. 46; ISSN 0002-7820
- Publisher:
- American Ceramic Society
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
THE Al$sub 2$O$sub 3$-Sm$sub 2$O$sub 3$ AND Al$sub 2$O$sub 3$-Gd$sub 2$O$sub 3$ SYSTEM
EXPERIMENTAL ATTEMPTS TO STABILIZE A CUBIC FORM OF BeO