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Methods of forming aluminum oxynitride-comprising bodies, including methods of forming a sheet of transparent armor

Patent ·
OSTI ID:985725

The invention includes methods of forming an aluminum oxynitride-comprising body. For example, a mixture is formed which comprises A:B:C in a respective molar ratio in the range of 9:3.6-6.2:0.1-1.1, where "A" is Al.sub.2O.sub.3, "B" is AlN, and "C" is a total of one or more of B.sub.2O.sub.3, SiO.sub.2, Si--Al--O--N, and TiO.sub.2. The mixture is sintered at a temperature of at least 1,600.degree. C. at a pressure of no greater than 500 psia effective to form an aluminum oxynitride-comprising body which is at least internally transparent and has at least 99% maximum theoretical density.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC07-05ID14517
Assignee:
Battelle Energy Alliance, LLC (Idaho Falls, ID)
Patent Number(s):
7,459,122
Application Number:
11/427,840
OSTI ID:
985725
Country of Publication:
United States
Language:
English

References (5)

A thermodynamic reassessment of the SiAlON system journal January 1995
Effect of Reaction Parameters on γ-AlON Formation from Al2O3 and AlN journal April 2002
Effects of a low amount of C on the phase transformations in the AlN–Al2O3 pseudo-binary system journal November 2000
Reaction sintering of AlN–AlON composites journal May 2005
Effect of LiAl5O8 additions on the sintering and optical transparency of LiAlON journal January 2006