Results 61 to 70 of about 28,396 (238)
Explosive Tube-to-fitting Joining of Small-diameter Tubes [PDF]
, 1985 An effort is currently under way by NASA Marshall Space Flight Center to upgrade the space shuttle main engine through the use of improved materials and processes.
Bement, L. J.
core +1 more source
Wearable Cooling Textiles of Thermal Conduction and Sweat Transfer for Personal Thermal Management
Advanced Science, EarlyView.This study constructs a three‐dimensional thermal‐conductive pathway using biomass‐based fibers. The thermally conductive composite fibers were designed into Janus‐structured fabrics. The wearable cooling textile exhibits unidirectional moisture‐wicking properties (476% index), a high water evaporation rate (5209.92 g/m2/day), and effective skin ...
Jiajing Zhang +5 more
wiley +1 more source
Journal of Manufacturing and Materials Processing, 2018 It was found that the ultrasonic spot welding may serve as an efficient method to join relative large thin-walled parts made of fiber-reinforced thermoplastics. In this study, a new control method for the ultrasonic spot-welding process was investigated.
Shahan Tutunjian +4 more
doaj +1 more source
Development of a beam builder for automatic fabrication of large composite space structures [PDF]
The composite material beam builder which will produce triangular beams from pre-consolidated graphite/glass/thermoplastic composite material through automated mechanical processes is presented, side member storage, feed and positioning, ultrasonic ...
Bodle, J. G.
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Full and half-wavelength ultrasonic percussive drills [PDF]
, 2018 Ultrasonic-percussive drills are a leading technology for small rock drilling applications where power and weight-on-bit are at a premium. The concept uses ultrasonic vibrations to excite an oscillatory motion in a free-mass, which then delivers ...
Harkness, Patrick +2 more
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Advanced Energy Materials, EarlyView.This review provides a bottom‐up evaluation of sodium‐ion battery safety, linking material degradation mechanisms, cell engineering parameters, and module/pack assembly. It emphasizes that understanding intrinsic material stability and establishing coordinated engineering control across hierarchical levels are vital for preventing degradation coupling ...
Won‐Gwang Lim +5 more
wiley +1 more source
NASA welding assessment program [PDF]
A long duration test has been conducted for comparing various methods of attaching electrical interconnects to solar cells for near Earth orbit spacecraft.
Stofel, E. J.
core +4 more sources
Development of explosive welding techniques for fabrication of regeneratively cooled thrust chambers for large rocket engine requirements Final report, 28 Jun. 1967 - 15 Sep. 1970 [PDF]
Explosive welding techniques in fabricating regeneratively cooled thrust chambers for large rocket engine requirements including ultrasonic inspection, metallography, and burst ...
Laber, D. +3 more
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Advanced Energy Materials, EarlyView.Aqueous lithium‐ion storage has been demonstrated using a hierarchically assembled hydrogenated borophene/cobalt‐nickel compound as a supercapattery electrode. Reducible hydrogenated borophene generates undercoordinated oxygen, which is redox‐active for lithiation and hydrogenation during the discharging process following the lithium hydroxide ...
Seunghwan Jo +10 more
wiley +1 more source
Dendrite Formation and Self‐Healing Mechanism in Ionic Liquid‐Based Magnesium Batteries
Advanced Energy Materials, EarlyView.This graphical illustration highlights the importance of operating Mg batteries within a safe operating current density (SOCD) range. Beyond this range, Mg batteries are susceptible to dendrite formation. However, when cycling a dendritic cell with a highly thermally stable electrolyte, a self‐heating effect occurs.
Omar W. Elkhafif +5 more
wiley +1 more source