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ORNL–General Atomics partnership on ceramic matrix composites
A memorandum of understanding has been signed by Oak Ridge National Laboratory and General Atomics Electromagnetic Systems (GA-EMS) with the objective of working together on advanced ceramic matrix composite materials for applications in extreme environments. Materials that can withstand extreme temperatures, radiation, corrosion, and mechanical stress are required in aerospace, defense, energy, and other sectors.
According to the agreement, the San Diego–based GA-EMS will use resources from ORNL’s Manufacturing Demonstration Facility to develop “scalable, efficient manufacturing techniques for extreme environment materials including precursors, fibers, composites, and coatings utilized in carbon/carbon (C/C), carbon/silicon carbide (C/SiC), and SiC/SiC composite systems.”
J. F. Bates, M. M. Paxton, J. L. Straalsund
Nuclear Technology | Volume 20 | Number 2 | November 1973 | Pages 134-135
Technical Note | Material | doi.org/10.13182/NT73-A31349
Articles are hosted by Taylor and Francis Online.
The thermal densification of austenitic stainless steel and the effect of minor alloy variations on this phenomenon have been investigated. Increasing the carbon content of AISI Type-316 stainless steel can produce density changes >0.1% after aging at 1500°F for 100 h. Large additions of phosphorus (0.04 wt%), boron (0.006 wt%), and nitrogen (0.13 wt%) produce no significant density change upon aging. It was concluded that the thermal densification phenomenon observed in austenitic stainless steels is due to the formation of carbides and is linear with the carbon content of the alloy.
