Multilayered thermal insulation formed of zirconia bonded layers of zirconia fibers and metal oxide fibers and method for making same

Patent · Tue Sep 13 00:00:00 EDT 1988

OSTI ID:7267912

Wrenn, Jr, G E; Holcombe, Jr, C E

A multilayered thermal insulating composite is formed of a first layer of zirconia-bonded zirconia fibers for utilization near the hot phase or surface of a furnace or the like. A second layer of zirconia-bonded metal oxide fibers is attached to the zirconia fiber layer by a transition layer formed of intermingled zirconia fibers and metal oxide fibers. The thermal insulation is fabricated by vacuum molding with the layers being sequentially applied from aqueous solutions containing the fibers to a configured mandrel. A portion of the solution containing the fibers forming the first layer is intermixed with the solution containing the fibers of the second layer for forming the layer of mixed fibers. The two layers of fibers joined together by the transition layer are saturated with a solution of zirconium oxynitrate which provides a zirconia matrix for the composite when the fibers are sintered together at their nexi.

• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
• Patent Number(s): US 4770930; A
• Application Number: PPN: US 6-933944
• OSTI ID: 7267912
• Resource Relation: Patent File Date: 24 Nov 1986
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
THERMAL INSULATION
FABRICATION
ZIRCONIUM OXIDES
COMPOSITE MATERIALS
MOLDING
SINTERING
ZIRCONIUM NITRATES
CHALCOGENIDES
MATERIALS
NITRATES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360601* - Other Materials- Preparation & Manufacture