Honeywell International Inc.

Akshay Waghray

Terence B Walker

Alan A Arico

Brian J Miller

David E Parker

Mark L La Forest

Laurie A Booker

James Jay Cress

Richard C Donaldson

Todd M Menzie

David W Shaw

Allan W Blunt

Terrence B Walker

In some examples, a technique for forming a partially densified preform including ceramic particles may include mixing a densifying agent with metal oxide particles or metal oxide precursor to form a blended densifying agent, infiltrating the blended densifying agent in to a porous preform, pyrolyzing the infiltrated preform to convert the densifying agent to carbon and form a partially densified preform, and heat treating the partially densified preform to react at least some of the carbon with the metal oxide particles to form ceramic particles. Composite materials formed from porous preforms in which a blended densifying agent is disposed in pores of the preform are also described.

Composite materials including ceramic particles and methods of forming the same

Method of chemical vapor infiltration of a deposable carbon material into a porous carbon fiber preform in order to densify the carbon fiber preform. The method includes the steps of: situating the porous carbon fiber preform in the reaction zone; providing a linear flow of a reactant gas comprising deposable carbon material in the reaction zone at an initial reaction pressure of at most 50 torr to produce deposition of the deposable carbon material into the preform; and adjusting the pressure of the gas to reaction pressures lower than said initial reaction pressure while deposable carbon material continues to be deposited into the porous carbon fiber preform. This method enables attainment of a target increased density in a carbon fiber preform much more quickly than known processes. A programmed pressure swing throughout the CVI/CVD run may be set in order to provide a linear increase in density. Alternatively, step changes in pressure during the course of the densification process may be made to enhance the rate of densification. This method reduces the number of cycles and the required intermediate machining steps necessary to densify preforms.

Pressure swing CVI/CVD

A method and brake disc assembly to utilize worn refurbished brake material is disclosed. The method discloses the use of a brake disc for braking and the subsequent machining or refurbishment of the brake disc so that the brake disc can be used for three tours of braking to increase the utilization of the brake material.

Method and brake disc assembly to utilize worn refurbished brake material

A gas preheater () that includes an exit plate () having first and second sides () and a plurality of through holes () and at least one body () mounted adjacent the first side (), the at least one body () having a first end () and a second end (), the second end () located between the body first end () and the exit plate first side (), at least one sidewall () connecting the first and second ends (), a body opening () in the first end () extending into the body () and defining a body inner wall (), and a plurality of passages () extending between the at least one sidewall () and the body inner wall ().

Gas preheater for chemical vapor processing furnace

Apparatus including a carbon-carbon composite pressure plate () having a friction surface () on one side thereof, a non-friction surface () on the opposite side thereof, and a body () between said surfaces. A wear pin housing () containing a wear pin retainer () is located in the pressure plate body (), the wear pin housing opening to the non-friction surface () but not opening to the friction surface (). A wear pin (), preferably made of carbon-carbon composite material, is located in the wear pin retainer (). The wear pin retainer (), which may be made of carbon-carbon composite material, is held in place in the wear pin housing () by the interaction of threading in the wear pin housing () and threading in the wear pin retainer () and optionally also by a carbonizable resin adhesive located between the wear pin housing threading and the wear pin retainer threading.

Wear pin assemblies for carbon-carbon composite brake systems

A template () configured for use with an annular preform () having a periphery () and an inner opening (), the template () having an annular body with an outer periphery () and an inner opening () and a plurality of spacer openings () through its body each for receiving a spacer (), one of the template inner opening () and the template outer periphery () having a width equal to the width of the preform inner opening () or the preform outer periphery (). Also a method for densifying preforms that includes a step of positioning spacers using a template.

Template for arranging spacers on a preform and method of densifying a preform including the use of spacers positioned by a template

Method for densifying a porous carbon preform (). The method includes the steps of: (a) providing the apparatus (); (b) charging the apparatus () with a plurality of stacks of annular porous carbon preforms (), the preforms being separated from one another by spacers (); (c) locating the charged apparatus () in a furnace at a temperature in the range of 950-1100&#xb0; C. and a pressure in the range of 5-40 torr; and (d) circulating a natural gas reactant blended with up to 15% propane through the apparatus for a period of from 150 to 900 hours. Carbon-carbon composite preforms made by this method may be configured as aircraft landing system brake discs or racing car brake discs.

Growing community of inventors

Granger, IN, United States of America

Akshay Waghray