environmental effects on the tensile strength of chemically vapor deposited silicon carbide fibers. technical memo

the room temperature and elevated temperature tensile strengths of commercially available chemically vapor-deposited silicon carbide fibers were measured after 15 min heat treatment to 1600 c in various environments. these environments included oxygen, air, argon and nitrogen at one atmosphere and vacuum at 10 to the minus 9th power atmos..

generation of round bores in composite structure railguns

a technique has been developed to generate precision round hole bores in composite structure railguns. development of tooling geometry, tool drive mechanism and coolant feed system has been successfully carried out. the combined techniques provide bores that are round and have better than 1.6 micrometers (63 microinches) surface finish th..

electroless plating of polymeric substrates. 1970-july 1985 (citations from the u. s. patent data base). rept. for 1970-jul 85

this bibliography contains citations of selected patents concerning electroless plating techniques used for materials deposition on polymer substrates. plating methods and compositions used in printed circuit device fabrication are discussed. plating solution preparations, and substrate surface treatment methods are included (contains 72 ..

is fast fiber innervation responsible for increased acetylcholinesterase activity in reinnervating soleus muscles,

an investigation was conducted as to whether the predominantly slow sol, which is low in ache activity, is initially reinnervated by axons that originally innervated fast muscle fibers with high ache activity, such as those of the edl. local denervation of the sol in the guinea pig was performed because this muscle is composed solely of s..

study of pulsed laser damage to optical fibers

this paper describes some observations of pulsed laser damage to optical fibers with emphasis on a damage mode characterized as a linear fracture along the outer core of a fiber. damage threshold data are presented which illustrate the effects of the focusing lens, end-surface preparation, and type of fiber. an explanation based on fiber-..

glutamic acid decarboxylase in kitten striate cortex. technical rept

degeneration of the thalamic fibers in the visual cortex of turtles leads to an increase in the numerical density of cortical synapses with flattened vesicles and symmetrical membrane differentiations (smith and ebner, 1980). this change correlates with an increase in the cortical activity of glumatic acid decarboxylase (gad), the synthet..

bulletin of the government industrial research institute, osaka, volume 35, number 3, september 1984. reprint: bulletin of the government industrial research institute, osaka, volume 35, number 3, september 1984

content: enzymatic degradation of finely divided wood meal (iv) hardwoods; on the impact values of new type impact test specimen; fabrication of cao-ga2o3-geo2 glass by use of image furnace; treatment of waste water from textile dyeing process (ii) effect of allophane clays as coagulant aid; enzymatic degradation of acetyl glucomannan (ii..

interaction of liquid crystals with inhomogeneous surfaces. final rept. 20 jul 80-19 jan 84

we undertook the study of the interaction of nematic liquid crystals with inhomogeneous solid surfaces, in the attempt to better understand surface interactions and to fabricate new kinds of devices with novel surface alignment techniques. along with the surface studies, we considered the optic properties of the new liquid crystal configu..

surface treatment for carbon fibers as aluminum reinforcements,

a cvd method for sic coating was investigated on a pan-based carbon fiber, ungraphitized. the decrease in tensile strength of carbon fiber brought about by a sic layer as an undercoat. the carbon fiber yarn with or without the double layers coating was infiltrated with molten aluminum, after had been titanium-boron treated. carbon fiber-a..

papers presented at the workshop on composite materials. symposium on fundamental industrial technologies for the next generations (2nd) , november 13-14, 1984

papers presented at this workshop covered such topics as: recent advances in technology for composite material in the usa (in english) ; molding processes for integral structure; low pressure, fast cycle frp fabrication technique; co2 laser application for cerp cutting; process control technique of cfrp by cure monitoring; present studies..