Method of making yttrium silicon oxynitrides

Patent · Mon Feb 25 23:00:00 EST 1985

OSTI ID:5526268

Ezis, A; Blair, H D

A method of making a powder additive consisting of yttrium silicon oxynitrides, preferably of the Y/sub 10/Si/sub 6/O/sub 24/N/sub 2/ or YSiO/sub 2/N phases, is disclosed. Stoichiometric amounts of Y/sub 2/O/sub 3/, SiO/sub 2/, and Si/sub 3/N/sub 4/ are mixed and arranged in intimate reactive contact, the amounts being to form a desired oxynitride according to the formula Y /sub a/ Si /sub b/ O /sub c/ N /sub d/ , where a, b, c and d represent the required element parts of the compound in equilibrium with the mixture elements. The mixture is heated in an inert atmosphere to a temperature and for a time sufficient to convert the stoichiometric amounts of the mixture to the desired yttrium silicon oxynitride. The heat agglomerated mixture is then ground to a powder.

• Assignee: Ford Motor Company
• Patent Number(s): US 4501723
• OSTI ID: 5526268
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ADDITIVES
BUILDING MATERIALS
COMMINUTION
GRINDING
HEATING
MACHINING
MATERIALS
MIXING
NITRIDES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PNICTIDES
POWDERS
PRODUCTION
SILICON COMPOUNDS
SILICON NITRIDES
STOICHIOMETRY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM NITRIDES