Carbon fiber, carbon composite and furnace purification by hydrogen reduction followed by thermal heat treatment
AssigneeGoodrich Corporation
InventorWeiming Lu
Life of this patent
Estimating the term…
Abstract
A method of manufacture for a carbon/carbon part including a method to remove contamination from an intermediate product of the carbon/carbon part and furnace utilizing a gaseous reducing agent hydrogen gas to reduce the contaminates, thereby causing the contaminates to transition to a gaseous state at relatively lower temperatures. A method to remove contamination from an intermediate product of the carbon/carbon part and furnace utilizing hydrogen gas to reduce the contaminates, thereby causing the contaminates to transition to a gaseous state at relatively lower temperatures.
Claims11
A method of removing contamination from at least one of a furnace and an intermediate product of a carbon/carbon part within the furnace comprising:
- introducing a gaseous reducing agent into the furnace at a first temperature;
- bringing the furnace to a second temperature to cause the gaseous reducing agent to reduce a contaminate, the second temperature being greater than the first temperature;
- substantially removing the gaseous reducing agent from the furnace by at least one of creating a first pressure differential and creating a first purging gas flow;
- bringing the furnace to a third temperature that is greater than the second temperature and decreasing a pressure within the furnace, after removing the gaseous reducing agent, to vaporize the contaminate;
- and
- removing the vaporized contaminate from the furnace by at least one of creating a second pressure differential or flowing a second purging gas through the furnace.
A method of removing contamination from at least one of a furnace and an intermediate product of a carbon/carbon part within the furnace comprising:
- introducing hydrogen gas into the furnace at a first temperature, allowing the hydrogen gas to reduce a contaminate in the carbon/carbon part;
- increasing the furnace to a second temperature that is greater than the first temperature;
- substantially removing the hydrogen gas from the furnace by at least one of creating a first pressure differential and creating a first purging gas flow;
- increasing the furnace to a third temperature that is greater than the second temperature after removing the hydrogen gas from the furnace and reducing a pressure in the furnace, wherein a contaminate transitions into a gaseous state;
- and
- creating at least one of a second pressure differential and a second purging gas flow to remove the contaminate.
Dependencies are inferred from the claim text.