STUDY OF THE SURFACE-CHARGE OF SILICON-CARBIDE (SIC) PARTICLES FOR ELECTROLESS COMPOSITE DEPOSITS - NICKEL-SIC

The aim of this work is develop interest in the electroless composite deposits Ni-SiC and, more particulary, in the physicochemistry of the particles used in relation to the deposit nickel bath. First, a pre-tr eatment of particles in an acid solution is realized to eliminate the impurities which hinder the codeposition process. Then, the surface ch arge of particles towards the deposit bath without and with organic ad ditives is studied, The influence of the use of these additives on the electroless composite deposits Ni-SiC is then observed. The resulting co-deposits are analysed under an optical microscope and the percenta ge of included particles is determined bq-picture analysis. (C) 1997 E lsevier Science S.A.