Advanced Ceramics - Ceramic Composites
Through advanced powder processing consolidation of ceramics, chemical vapor infiltration (Isothermal CVI and Reverse Thermal Gradient CVI), and polymer infiltration and pyrolysis (PIP) of ceramic and ceramic/metal composites, TA&T is pushing the boundaries of ceramic material capabilities.
Powder processing capabilities include powder property characterization, rapid mixing, spray drying, cold pressing of green bodies, tape/slip casting, photopolymer-based fabrication, sol gel based methods, cold isostatic pressing, pressureless sintering, hot pressing and hot isostatic pressing.
Ceramic and ceramic/metal matrix composites (including particle, whisker and fiber reinforced composites) are targeted predominantly for structural applications.
| Advanced Ceramic and Coating Materials and Applications |
| Materials |
Applications |
| AlN Direct Manufacturing |
Multichannel radiators
Heat Spreaders
|
| Alumina |
Medical components
Insulators
Armor
|
| Silicon Carbide |
Wear components
Mirror substrates
|
| Carbon Foam |
High conductivity heat exchangers
Radiators
|
|
Graded ceramic-metal
composites
(C-SiC-HfC, HfC-TaC,
SiC-TaC, C-Re)
|
Missile Components
Divert propulsion thrusters
Insulators
Valves
|
| SiC/SiC, C/SiC, C/C |
Turbine engine combustors
Vanes, shrouds, flame holders
Flaps, seals
Nuclear fusion components
|
Ta&T news
Annapolis, MD – November 29, 2011 – Ceramic Stereolithography (CSL), a unique manufacturing process developed by Technology Assessment and Transfer, Inc. (TA&T) under multiple SBIR and internally funded programs, was used to make ceramic heater bodies that are onboard the recently launched Mars rover named Curiosity.
Contracted by the NASA Goddard Space Flight Center, TA&T fabricated alumina pyrolysis oven housings that are being used in the Sample Analysis at Mars (SAM) suite of instruments. Patrick Jordan, a NASA engineer, explained that due to the complex nature of the housing, traditional machining of the ceramic was too expensive to undertake. The major impediment to machining the housing is a series of 52 closely spaced, small diameter (.012”) holes through which heating elements are placed. Impressively, the CSL process was able to create fully functional prototypes that survived the rapid heating to >1,000°C. The parts passed thermal shock and thermal cycle durability testing, and will be used on Mars to heat soil samples to determine the presence of water and organic compounds that indicate the possibility of life on Mars.
The CSL process has applications beyond space exploration, including those which have consumer and industrial applications. The process requires no tooling and therefore allows rapid prototyping of fully-functional ceramic parts. TA&T has been involved in the development of rocket engine fuel injectors, heat exchangers for cooling electronics in hybrid electric vehicles, ceramic molds for turbine engine blades, and electrosurgical medical device tips, among other development projects.
Photographs of the TA&T produced ceramic heater housing for the Mars Science Laboratory can be found in the Ceramic Stereolithography gallery.
Additional information about the Mars Science Laboratory mission can be found at http://www.nasa.gov/mission_pages/msl/index.html.
Annapolis, MD – November 21, 2011 – Technology Assessment & Transfer, Inc. has just completed a kickoff meeting as a prime contractor on an Air Force SBIR Phase II.
Led by Dr. James Hom, the Air Force Phase II effort is focused on advanced cooling and packaging designs for electronic components within an aircraft's power electronic converter. The proposed component level solutions substantially reduce the thermal resistances between the highest heat producing components (e.g., the power switching modules, magnetic inductors, and capacitors) and the coolant. These solutions will be integrated into an existing power electronic converter and tested in a simulated aircraft environment. An increase in maximum allowable inlet coolant temperature of at least 30°C is expected.
