PMC

Cluster-hole press fit shell, fibre metal-coated, alumina ceramic acetabular insert, alumina ceramic femoral head and porous collared stem, fibre metal midcoat (left). Multi-hole press fit shell, fibre metal-coated, cross-linked polyethylene acetabular insert, cobalt-chrome femoral head and porous collared stem, fibre metal midcoat (right)

(a) Illustration of the fibre preform structure—chalcogenide glass (As₂Se₅) (red core) and two carbon black polyethylene composite (CPE) electrodes (black cores) are inserted into a polycarbonate (PC) cladding. The preform is scaled down in the drawing tower furnace into a fibre. (b) Optical micrograph of the cross section of the fibre shown in a. The semiconducting core has a radius of 50 μm. (Scale bar, 200 μm) (c) The fibre illustrated in a is inserted into another preform with extended electrodes to facilitate connection to the fibre after draw. This preform is drawn again in order to reduce the size of the chalcogenide core. (d) Optical micrograph of a redrawn fibre with extended electrodes and a chalcogenide core of 5 μm radius; Inset—optical micrograph of the active region of the redrawn fibre. (Top black scale bar, 100 μm; Bottom red scale bar, 20 μm).

Variation in wear of coir fibre and yam peel particulate polyethylene composite.

Variation in tensile modulus of coir fibre and yam peel particulate polyethylene composite.