Fe-Cu duplex metal filaments.
Leavenworth-HW Jr.; Dunning-BW Jr.; Gabler-RC Jr.; Goldsmith-CE
U S Pat 3 902 865 Sept 2 1975 :
Filaments are grown by solid state reactions in a sulfur-deficient matte containing cu and fe. Cu, fe, or cu-fe filaments are produced by adjustment of the temperature and growth conditions. The cu-fe duplex filaments consist of cu at one end and fe at the other, with a sharp junction in between. Individual filaments are typically approximately 1 um in diameter and grow in bundles approximately 10 um in diameter. Lengths of 2-3 cm are produced in several minutes. The filaments separate easily from the matte surface. The filaments are useful for strengthening metallic composites.
U.S. Pat. 3,902,865; Sept, 2, 1975; Chem. Abstr. 84:78,349Z