electropolymerization on carbon fibers - effects on composite properties

interface tailoring in carbon fiber-polymer composites by means of electrochemical polymerization has been investigated. it was expected that fiber-matrix adhesion and composite mechanical properties can be modified by the electrochemical formation of polymer layers of varying structure and properties on carbon fibers prior to their incor..

process studies and fabrication of rocket motor body by ausforming process

thermomechanical forging of the 105mm xm548 rocket motor body was investigated during this study. both ausforming and hot-cold working were investigated using 4340 and d6ac steels. ausforming resulted in the greatest improvement in yield and tensile strength but at a sacrifice in ductility and impact resistance. hot-cold working appears t..

production and properties of whisker-reinforced light metals

the whiskers are incorporated by a powder metallurgical technique first a whisker metal powder mixture with a random whisker orientation is prepared. the mixture is then densified by vacuum hot pressing and finally unidirectionally aligned by extrusion. the effect of extrusion temperature on surface finish and fiber damage is investigated..

exp 238 pu fuel form processes. savannah river laboratory monthly report

laboratory-scale tests indicate that 10- mu exp 238 puo sub 2 may be produced with few fines less than 4 mu , if direct-strike oxalate precipitation is performed with proper mixing action and very high addition rates of oxalic acid. thoria stand-in has been coated with molybdenum using 4 percent h sub 2 -96 percent he in a startup of the ..

ceramic materials in rolling contact bearings

the objectives of the program were to design, fabricate and evaluate the performance of a roller bearing having hot-pressed silicon nitride rollers and steel races at speeds up to 71,500 rpm (2.5 million dn). the 35mm bore bearing consists of aisi cvm m50 steel races, fourteen fully crowned nc-132 silicon nitride rollers and a silver plat..

characteristics of thick non-planar sio sub 2 coatings

we have successfully developed a new process for making strong, smooth, thick sio sub 2 films on hemispherical kovar mandrels of various sizes designed for multishell laser fusion targets. the surface finish obtainable with a 13 mu m thick sio sub 3 coating on a 260 mu m dia. mandrel is approximately 30 nm peak-to-peak, with a few defects..

research on electrodes and electrolyte for the ford sodium-sulfur battery

in this report, research findings at the university of utah are reported on the (1) fabrication of pre-sintered beta double prime-alumina tubing, (2) sintering processes for beta double prime-alumina, (3) characterization of beta double prime-alumina, and (4) development of a metal clad electronic ceramic (rutile) container or current col..

evaluation of the effectiveness of fabric reinforcement in extending the in-service life of bituminous concrete overlays

included in this final report is the description of tests of fabric and non-fabric treated overlays of a jointed unreinforced portland cement concrete pavement on us 70 in orange county, north carolina treatment of the overlays were for the purpose of determining their effectiveness in preventing or reducing reflection of joints and crack..

nbs activities in apparel flammability

this paper gives a brief overview of apparel flammability research activities of nbs and development of an apparel flammability test research consists of programs to explore: heat transfer during free burning and after contact is made between the burning fabric and a simulated body; ease of extinguishment; and optimization of fabric speci..

composite materials for maxillofacial prostheses

the purpose of this program is to develop ultrasoft composite materials to be used as fillers in the fabrication of maxillofacial prostheses. the projected composite systems are elastomeric-shelled, liquid-filled microcapsules. two experimental approaches were pursued toward making such microcapsules. one approach involves coaxial extrusi..