A series of TiNbHf alloys ranging from 0-40 atomic %
Nb and 0-15 atomic % Hf were evaluated to investigate
low-elastic modulus phenomena which occur in this ternary
system. The desirability of utilizing corrosion-resistant, biocompatible alloys with elastic modulus values
approaching that of human bone for medical prosthetic
implants provides...
It is well established that the extended range V(I) transition behavior in
filamentary superconducting composites depends strongly on the processing
conditions of the composite. Based on previous work, a model proposed by
Warnes et al predicts that the second derivative of the V(I) transition is related to
a more fundamental...
One method of fabricating intermetallic nickel-aluminum MECS devices involves diffusion bonding together pre-patterned elemental foils of nickel and aluminum. This process shows good potential for the mass-production of NiAl devices, but several quality issues remain. Of large concern is the deformation of internal features during the bonding process. This research...
Measurement of the copper to superconductor ratio (Cu/SC) in
composite superconducting wires is necessary for process control, quality
assurance, and characterization of the final wire properties.
A comparison has been made of three techniques for measuring the
Cu/SC ratio on a set of commercial wires produced for the Superconducting
SuperCollider...
Mechanical properties of Nb-Ti composite superconducting wires were tested at
room temperature. The results were analysed using simple composite theory, the rule
of mixtures. The objective is to predict the mechanical properties of Nb-Ti
superconducting composite wires as a function of volume ratio and geometry of the
components, the composite...
Mechanical behavior of Nb-Ti superconducting composites with copper matrices have
been studied experimentally and theoretically.
Experimental work includes extensive measurements of Cu/Nb-Ti composite system.
Techniques for fine fiber testing and composite wire measurement have been developed.
Experimental parameters examined in this research include geometry, hardness, Young's
modulus, Poisson's ratio, yield...
The metallurgy and superconductivity of the Nb-Ti-Ta ternary alloy system were studied. The Nb-Ti, and Ta-Ti binary samples, and Nb-Ti-Ta ternary samples were precipitation heat treated under different schedules. After the precipitating heat treatment, the samples were characterized by X-Ray Diffraction (XRD) techniques. Equilibrium binary and ternary phase diagrams based...
In wood-based composites, the glue-line (interface) between wood-strands affects the stress transfer from one member to the next. The glue-line properties determine the rate of load transfer between phases and these properties depend on wood species, surface preparation, glue properties, glue penetration into wood cells, and moisture content of the...