Protection for a carbon material, in particular C/C composite, bowl that is to receive a crucible, such as a silica crucible for drawing silicon
AssigneeSnecma Moteurs
InventorsJacques Thebault, Jean Michel Georges, Dominique Coupe
Life of this patent
Estimating the term…
Abstract
Prior to housing the crucible in the bowl, a consumable buffer ply is applied over at least a portion of the inside face of the bowl, the ply being constituted essentially by a non-rigid carbon fiber fabric for protecting the bowl from both physical and chemical interactions with the crucible. The buffer ply is essentially constituted by a flexible fabric selected from: a woven cloth, a knit, a multidirectional sheet, and a thin felt. Prior to putting the ply into place in the bowl, it is possible to form a thin deposit of pyrolytic carbon on the fibers of the fabric.
Claims21
A method of mounting a crucible in a bowl of carbon material, wherein, prior to housing the crucible in the bowl, a consumable buffer ply constituted essentially by a non-rigid fabric of carbon fibers is applied over at least a central portion of a bottom inside face of the bowl in order to protect the bowl from both physical and chemical interactions with the crucible.
A metallurgical installation comprising a bowl of carbon material, a crucible housed in the bowl, and a protective lining for protecting the bowl interposed between at least a central portion of a bottom inside face of the bowl and the crucible, wherein the protective lining is formed by a consumable, non-rigid buffer ply essentially constituted by a carbon fiber fabric.
A method of mounting a crucible in a bowl made from a carbon material comprising:
- disposing a consumable buffer ply over at least a portion of an interior face of the bowl, the buffer ply comprising a non-rigid carbon fiber fabric;
- and
- mounting the crucible in the bowl such that the crucible is substantially separated from an interior surface of the bowl by the consumable buffer ply.
An assembly comprising:
- a support bowl made from a carbon material;
- a crucible housed in said bowl;
- and
- a lining comprising a consumable non-rigid carbon fiber fabric interposed between an interior face of said support bowl and said crucible so as to substantially separate said interior face and said crucible.
Dependencies are inferred from the claim text.