specular steel surfaces for solar mirror substrates

the long-range objective of this task is to develop a process for making a silvered stainless steel mirror that has the optical performance and service life of a silvered glass mirror coupled with the mechanical durablilty, structural strength, and flexibility of sheet steel. such reflectors are expected to minimize the cost handling, shi..

electroless plating of polymeric substrates. january 1970-september 1988 (citations from the u.s. patent database). rept. for jan 70-sep 88

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

improved silicon nitride for advanced heat engines

silicon nitride is a high temperature material currently under consideration for heat engine and other applications. the objective is to improve the net shape fabrication technology of si3n4 by injection molding. this is to be accomplished by optimizing the process through a series of statistically designed matrix experiments. to provide ..

laser robot in the nuclear industry

possibilities of power lasers for welding, cutting, drilling, plugging surface treatment and hard-facing are reviewed. co/sub 2/ and nd:yag lasers only have adequate power for nuclear applications radiation effects on lasers and contamination problems are examined then examples of applications to nuclear industry are given: pwr fuel fabri..

rf properties of superconducting pb electroplated onto cu

the properties of pb as a superconducting material for high power rf applications are reviewed. the most common method of producing pb superconducting resonators, which is by electrodeposition of a thin layer on a cu substrate, is described. 50 refs., 12 figs., 1 tab (era citation 13:024614)

advances in the technology for the permeable base transistor journal article

the gaas permeable base transistor (pbt) is fabricated by using overgrowth to embed a polycrystalline, submicrometer-period tungsten (w) grating completely within a single crystal of n-type gaas. recent pbts have experimentally demonstrated an extrapolated maximum frequency of oscillation (f max) of 223 ghz and an extrapolated unity curre..

interactions between science and precision engineering

the history of scientific progress is intertwined intimately with precision engineering. precision engineering and science have synergistically interacted in stimulating each other to significant advances. furthermore, tangible benefits to the quality of human life, through often unexpected industrial applications, occur. high energy lase..

advanced austenitic alloys in steam service. ntis tech note

this citation summarizes a one-page announcement of technology available for utilization. design criteria and evaluation methods have been identified for austenitic alloys needed for steam service at 650 c and 35 mpa. the design criteria fall into five categories: metallurgical stability, fabrication and joining, mechanical properties, fi..

pipeline system insulation: thermal insulation and corrosion prevention. december 1985-september 1989 (citations from the rubber and plastics research association database). rept. for dec 85-sep 89

this bibliography contains citations concerning thermal and corrosion insulating of pipeline systems utilized to transfer liquids and gases. thermal aging of polyurethane foam for insulating heating pipes, extrusion film pipeline insulation materials and processes, flexible expanded nitrile rubber pipeline insulation with class 1 fire rat..

properties of devices prepared with epitaxial layers on inp. final rept. jul 85-jun 87

electrical measurements were made on capacitors prepared with rpecvd sio2 films on p-type ga(0.47)in(0.53)as at low substrate temperatures. these measurements demonstrated that the rpecvd dielectric is suitable for use in the fabrication of misfets measurements on rpecvd sio2 layers on si showed that care must be taken in cleaning and pro..