final report. i. coatings program. ii. castings process development iii. casting program of xm 29 face piece

summaries of aims and objectives and significant results obtained in each of three programs, viz, coatings, coating process development and casting are given. some data and test results to aid readers' understanding are included. (author)

array automated assembly task. phase 2. low cost silicon solar array project. quarterly technical report no. 1, october--december 1977

an automated process sequence was defined, process steps were organized into groups for investigation, and data was gathered and analysis begun for four process groups. a solar cell test data acquisition system was designed. this system will automatically sample and plot the electrical performance of solar cells and will also be adaptable..

the effects of coatings applied to contact surfaces of high strength bolted joints on slip behavior and strength of joints

the research objective was to determine if certain rust inhibiting coatings applied on contact surfaces of friction-type high-strength bolted structural joints could provide sufficient slip resistance under constant or cyclic loads. the performance of various coatings, including a vinyl wash primer, an organic zinc-rich primer and zinc me..

fabrication of implantable artificial heart devices and components

the report describes the fabrication of an implantable left ventricular assist device designed specifically for intrathoracic implantation into humans. the current model vi lvad allows actuation by pneumatic, hydraulic and electrical drive systems under development by other dtb contractors. a total of 58 lvad's and 4 lvao shunts were asse..

contacts to semiconductors

contacts to semiconductors play an important role in most semiconductor devices. these devices range from microelectronics to power components, from high-sensitivity light or radiation detectors to light-emitting of microwave-generating components. silicon is the dominating material but compound semiconductors are increasing in importance..

development of an improved high efficiency thin silicon solar cell

efforts were concerned with optimizing techniques for thinning silicon slices in naoh etches, initial investigations of surface texturing, variation of furnace treatments to improve cell efficiency, initial efforts on optimization of gridline and cell sizes and pilot line fabrication of quantities of 2 cm x 2 cm 50 micrometer thick cells

immobilized enzymes (citations from the ntis data base)

the bibliography covers the industrial as well as the biochemical use of immobilized enzymes. enzyme technology, activity, stability, supports, fabrication, deactivation, and chemical reactions are cited. some of the applications for these enzymes include food processing and chemical manufacturing. (this updated bibliography contains 98 a..

sprayable low density ablator and application process

a sprayable, low density ablative composition is described consisting esentially of: (1) 100 parts by weight of a mixture of 25-65 by weight of phenolic microballoons, 0-20 by weight of glass microballoons, 4-10 by weight of glass fibers, 25-45 by weight of an epoxy-modified polyurethane resin, 2-4 by weight of a bentonite dispersing aid,..

brittle materials design, high temperature gas turbine. volume 2 ceramic turbine rotor technology

the progress in the last nine months on erda supported programs within the joint darpa/erda supported 'brittle materials design, high temperature gas turbine' program is reported on in this volume volume 1 covers the progress on the darpa supported ceramic turbine testing program. investigations of the materials used to fabricate duo-dens..

study of reactive materials for development of new protective clothing concepts

this report describes investigations of reactive materials suitable for incorporation in or on fabrics for protection from percutaneous chemical warfare agents. microencapsulated forms of alkali metal hydroxides and aliphatic amines were developed and found to be unsuitable for protection from hd. aqueous solutions of aliphatic amines con..