Abstract
Transmission electron microscopic observations have been done using a 1000KV electron microscope on the copper filaments produced by the method of glass coated melt spinning. Dislocation tangles, dislocation loops and twins were observed in the copper filaments spun at various winding speeds. The density of dislocation tangles became homogeneous and higher with increasing the speed of winding. The high tensile strength, 150kg/mm2, of the copper filaments spun at a winding speed of more than 200m/min may result from the high density of dislocation tangles where many slip dislocations are trapped.
