Pressure gradient CVI/CVD apparatus and method
US7335397B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2004 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Nov 12, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S427/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An apparatus and method for densifying porous structures inside a furnace using pressure gradient CVI/CVD. The apparatus includes a stack of porous structures where each porous structure has an aperture therethrough. The apparatus also includes at least one ring-like spacer disposed within the stack of porous structures between neighboring porous structures. The ring-like spacer encircles the apertures of the neighboring porous structures. The stack of porous structures and the at least one ring-like spacer define an enclosed cavity including each porous structure aperture. A channel provides fluid communication between the enclosed cavity and an outer volume defined by the interior surface of the furnace.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.