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Synthesis of nanostructured Ni/Cr and Ni-Cr3C2 powders by an organic solution reaction method

Synthesis of nanostructured Ni/Cr and Ni-Cr3C2 powders by an organic solution reaction method. Xiao, T. D.; Torban, S.; Strutt, P. R.; Kear, B. H.Chemicals with cas numbers 7440-02-0 and 17979-81-6 also play role. (Advanced Technol. Cent. Precision Manuf., Univ. Connecticut, Storrs, CT 06269, USA). Nanostructured Materials, 7(8), 857-871 (English) 1996 Elsevier. CODEN: NMAEE7. ISSN: 0965-9773. DOCUMENT TYPE: Journal CA Section: 56 (Nonferrous Metals and Alloys) Section cross-reference(s): 57 Nanostructured nickel/chromium (Ni/Cr) and nickel-chromium carbide (Ni-Cr3C2) powders were prepd. via a chem. route. The technique involves reductive decompn. of an org. soln. of metal chloride precursors using sodium triethylborohydride. After co-pptn. of a nanoscale mixed metal (Ni+Cr) powder, low temp. annealing is used to form nanostructured Ni/Cr alloy powder, or low temp. gas phase carburization to form nanostructured Ni-Cr3C2 cermet powder. These powders were characterized by x-ray diffraction (XRD), transmission electron microscopy, SEM, and chem. anal. The mechanisms of halide redn. and phase formation are discussed. .