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Date: 23 November 2017
Titanium Matrix Composite Turbine Engine Component Consortium (TMCTECC)  
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Titanium Matrix Composite Turbine Engine Component  Consortium (TMCTECC)

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Titanium Matrix Composite Turbine Engine Component Consortium (TMCTECC)

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Product Description

Titanium Matrix Composite Turbine Engine Component  Consortium (TMCTECC)
Six companies have joined
together with the Government to conduct a program aimed at implementing titanium
matrix composites into large gas turbine engines.  The potential benefit to the
U.S. aerospace industry could translate into a significant competitive advantage
and a market share increase for the U.S. aircraft and engine manufacturers.  The
potential benefit to the industrial base for metal matrix composites could
result in the foundation from which widespread implementation of metal matrix
composites could finally become affordable.
In August 1994, a major initiative to pursue and exploit the use of titanium
matrix composites in gas turbine engines was begun with the formation of the
Titanium Matrix Composite Turbine Engine Composite Consortium (TMCTECC).  The
consortium consisted of two propulsion companies (General Electric Aircraft
Engines and Pratt & Whitney), three manufacturers of titanium matrix composite (TMC)
materials (Textron Specialty Materials, Atlantic Research Corporation and 3M)
and one aerospace component manufacturer with particular expertise in castings (Howmet). 
Industrial membership in the TMCTECC team required cost sharing, an agreement to
fully share technical data across the team and an assumption of business risk.
The intent of this Title III-funded effort is to establish a stable
industrial base that will facilitate continued supplier profitability and
material cost reductions.   The cost of the TMC materials has historically been
the most significant impediment to their usage over the past thirty years. 
Since the cost of the TMC material is most strongly controlled by the volume of
the market, the principal purpose of the TMCTECC program was to help generate
the market required for TMC materials that would yield an acceptable cost.
The TMCTECC program has determined the required size of the market needed to
achieve a cost level required for acceptance of the TMC materials into engine
applications.  In addition, the market will have to be of sufficient size to
sustain a healthy industrial base from which the components made with TMC
materials could be purchased.  Success in the TMCTECC program would assure
availability of TMC materials throughout the foreseeable future and eliminate
the need for continued Government support of this technology.
Technology Base
The TMCTECC program is seeking to deploy TMC technology that has been
developed and demonstrated in previous efforts such as those under the
Integrated High Performance Turbine Engine Technology (IHPTET) Joint Technology
Demonstrator Engine (JTDE) programs.  While the early program emphasis was on
the application of TMC materials to large turbo fan engines for commercial and
transport applications, the current focus is on large fighter engines such as
the F110, F119, F120 and their derivatives (see Figure 1).
In Figure 2 is shown a silicon carbide fiber reinforced hollow titanium fan
blade configured to fit into the F110 engine.  This component was fabricated as
part of the JTDE program under joint sponsorship of the United States Air Force
(USAF) and General Electric Aircraft Engines (GEAE).
Other components that are being evaluated include static components such as
actuator pistons, synchronization rings and connecting links and rotating
components such as shafts and disks (see Figure 3).
Industrial Technology Base

During the last ten years, three methods for manufacturing TMC materials have
been matured under Government and industrial resources.  These methods each have
advantages for particular applications and, as a result, all are being pursued
simultaneously under the auspices of the TMCTECC management team.
At Atlantic Research Corporation (ARC) a batch tape making process has been
developed and optimized that can utilize either powder or wire of the titanium
alloy matrix composition which is combined with the silicon carbide fibers to
form the TMC material.  The ARC fabrication method is currently a batch process,
as shown in Figure 4.  Textron Specialty Materials (TSM) has developed and
optimized a continuous tape making process that utilizes titanium alloy powder
that is cast onto an array of fibers on a backing tape.  This process is shown
in Figure 5.
At 3M, an Electron Beam/Physical Vapor Deposition (EBPVD) process is used to
coat each of the individual silicon carbide fibers with the matrix material. 
The fibers can then be used directly or combined together to form a high density
tape product form (see Figure 6).  The high density tape is particularly useful
where thick sections of TMC material are required to achieve the performance of
the component.
Forecast Market for TMC Materials
In order to stabilize the industrial base for TMC materials, a large and
varied market for TMC components is needed.  To aid in accomplishing this, the
TMCTECC team evaluated a large variety of commercial and military applications
with respect to the potential performance benefits to the user community and the
potential impact on the market for TMC materials.  The result of that study
projected that the demand for TMC materials could grow over the next ten years
to well over the 15,000 pounds per year needed to achieve the cost goal.  This
level of demand will also provide a sufficient business base to sustain the
industrial capability for manufacturing TMC materials and components in the
United States.
Current Activities
The current focus of the TMCTECC team is on launching the lower risk
applications for TMC materials in the military engines. Putting TMC components
into the real production environment will help to validate the cost, quality and
performance of these materials and lay the foundation for additional
applications to be initiated throughout the aerospace industry.

Titanium Matrix Composite Turbine Engine Component  Consortium (TMCTECC)

Company Details

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