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Research and Development on Advanced Graphite Materials. Volume Xxxviii. Development of an Improved Large-Diameter Ultrafine-Grain Graphite

机译:先进石墨材料的研究与开发。卷Xxxviii。一种改进的大直径超细晶粒石墨的研制

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The report describes the development, fabrication processes and physical properties of grade RVD graphite (formerly RT-0008), 18-inch diameter by 15-inch length, and an attempted scale-up of this grade to 33-inch diameter. Grade RVD graphite, an extra-fine-grain material formed by pressure curing, is nominally characterized by a density of 1.87 to 1.89 g/cc and flexural strengths of 4700 lbs/sq. in with the grain and 310 lbs/sq. in across the grain. Nozzles made from RVD graphite, tested in a subscale rocket motor, exhibit a low erosion rate and high thermal shock resistance. (Author)

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