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
US6616756B2 · kind B2 · utility
2Cited by
0References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2001 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Dec 26, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1052
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.