We have studied the microhardness of undoped and dopant modified YBa2Cu3O7
superconducting ceramics as a function of load and dopant concentration using the Vickers …

Using ultrasonic methods, the quasi-isotropic elastic stiffnesses of void-containing
Y1Ba2Cu3O7− x were determined By a composite-material model, these were corrected to …

X‐ray diffraction, de resistivity, and microhardness studies of Bi2− xPbxCa2Sr2Cu3Oy
Superconductors with x= 0 to 0.4 are performed. The first two studies evidence the formation …

Mechanical properties of the orthorhombic phase of YBa 2 Cu 3 O 7− δ (Y123) at room
temperature have been investigated at different applied loads: 5, 10, 30 and 100 mN using a …

A brief overview of recent superconductivity research at NIST is presented. Emphasis is
placed on the new high-temperature oxide superconductors, though mention is made of …

The relationship between the normalised ultrasonic velocity (vv 0) and the volume fraction
(P) of pores in porous materials has been derived on the basis of a minimum solid area of …

Pronounced textures have been found in hot‐extruded and hot‐pressed YBa2Cu3Ox
powders. The basal plane is preferentially oriented normal to the maximum compression …

The porosity dependence of ultrasonic velocity in porous sintered materials has been
modelled using the self-consistent spheroidal inclusion theory. Considering the pores to be …

This paper compares the properties of yttrium barium cuprate bulk specimens prepared by
means of solid-state sintering on one hand and of growth from a largely molten state on the …

The physical behavior of components manufactured from polycrystalline materials is in many
cases directly dependent on the porosity fraction (volume fraction of pores). As examples …