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Hot pressed niobium carbide--graphite composites. Progress report

Description: Declassfied 30 Aug 1973. An investigation was conducted to determine the manufacturability of hot-pressed 75--25 wt% NbC--graphite composites. Commercially available and custom ground superfine carbide and graphite powder combinations were evaluated; the hot pressing operation was studied; and machining techniques were developed. The relationship of the physical properties of the starting powders to thermal and mechanical properties of the composites was studied. Room temperature and 2400 deg C… more
Date: June 1, 1967
Creator: Blay, J.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a process to lower the thermal expansion of hot pressed niobium--graphite composites

Description: Declassified 30 Aug 1973. Recent analysis of the NERVA hot end support system revealed that the high with-grain (WG) thermal expansion and the high creep deformation of NRX-A6 NERVA-type 75 wt% niobium carbide -- 25 wt% graphite hot pressed composite material may not be entirely satisfactory in future designs. Design requirements have shown the need for a better match between the normally high average coefficient of thermal expansion ( alpha ) of the composite material and the fueled graphite. … more
Date: August 1, 1968
Creator: Blay, J.S. & Ellenburg, G.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Cryogenic Radiation Damage in Structural Polymers

Description: The useful service limitations of polymers and polymer-bonded laminates used for bearing retainer materials needed to be established to determine their suitability for the NERVA system. Materials investigated included two forms of Teflon bonded glass cloth laminate (Armalon), a polyimide formulation filled with 15% MoS$sub 2$ and FEP Teflon.
Date: November 1, 1966
Creator: Dixon, C. E. & Funk, C. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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