Crucible and extrinsic facecoat compositions

Patent metadata

Field	Value
Publication number	US-8992824-B2
Application number	US-201213693155-A
Country	US
Kind code	B2
Filing date	Dec 4, 2012
Priority date	Dec 4, 2012
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

Crucible compositions and methods of using the crucible compositions to melt titanium and titanium alloys. More specifically, crucible compositions having extrinsic facecoats comprising a rare earth oxide that are effective for melting titanium and titanium alloys for use in casting titanium-containing articles. Further embodiments are titanium-containing articles made from the titanium and titanium alloys melted in the crucible compositions. Another embodiment is a crucible curing device and methods of use thereof.

First claim

The invention claimed is:

1. A crucible for melting titanium and titanium alloys, said crucible comprising:
an extrinsic facecoat having a plurality of extrinsic facecoat layers including a primary extrinsic facecoat layer comprising a rare earth oxide and at least one secondary extrinsic facecoat layer;
a bulk disposed on an outer surface of the at least one secondary extrinsic facecoat layer and comprising a calcium aluminate cement; and
a cavity for melting titanium and tit…

Assignees

• Gen Electric

Inventors

• Bewlay Bernard Patrick
• Bancheri Stephen Francis
• Mckiever Joan
• Ellis Brian Michael

Classifications

• B28B7/0002

  Operations & Transport · mapped topic

• B28B1/16

  Operations & Transport · mapped topic

• F27M2001/01

  Mechanical Engineering · mapped topic

• F27B2014/104

  Mechanical Engineering · mapped topic

• F27D1/0006 Primary

  Mechanical Engineering · mapped topic