Method for thermal processing alumina-enriched spinel single crystals
Patent
·
OSTI ID:46308
A process for age-hardening alumina-rich magnesium aluminum spinel to obtain the desired combination of characteristics of hardness, clarity, flexural strength and toughness comprises selection of the time-temperature pair for isothermal heating followed by quenching. The time-temperature pair is selected from the region wherein the precipitate groups have the characteristics sought. The single crystal spinel is isothermally heated and will, if heated long enough pass from its single phase through two pre-precipitates and two metastable precipitates to a stable secondary phase precipitate within the spinel matrix. Quenching is done slowly at first to avoid thermal shock, then rapidly. 12 figs.
- Research Organization:
- E I Dupont De Nemours & Co Inc
- DOE Contract Number:
- AC09-76SR00001
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- Patent Number(s):
- US 5,413,973/A/
- Application Number:
- PAN: 8-190,940
- OSTI ID:
- 46308
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method for thermal processing alumina-enriched spinel single crystals
Synthesis of magnesium aluminate spinel by periclase and alumina chlorination
Precipitation in alumina-rich spinel: A transformation-toughened ceramic single crystal
Patent
·
Sat Dec 31 23:00:00 EST 1994
·
OSTI ID:869876
Synthesis of magnesium aluminate spinel by periclase and alumina chlorination
Journal Article
·
Fri Nov 14 23:00:00 EST 2014
· Materials Research Bulletin
·
OSTI ID:22420647
Precipitation in alumina-rich spinel: A transformation-toughened ceramic single crystal
Technical Report
·
Wed Jul 01 00:00:00 EDT 1987
·
OSTI ID:6017073