CORROSION AND MECHANICAL BEHAVIOR OF COPPER- NIOBIUM NANO-FILAMENTARY MICRO-COMPOSITES FOR HIGH PERFORMANCE ELECTRICAL CONDUCTOR WIRE
来源期刊：Acta Metallurgica Sinica2002年第2期
论文作者：S.I.Hong Y.Choi T.W.Lim
Key words：Cu-Nb micro-composites; corrosion; microstructure;
Abstract: Corrosion behavior of heavily drawn bundled Copper-niobium filamentary micro-composite was studied as a function of niobium content to develop the relationshipbetween microstructure and corrosion behavior in aqueous 30% HCl-FeCl3 solution.TEM observation revealed that niobium filaments were distributed regularly in coppermatrix along the sides of a triangular unit cell in the transverse section and more sub-grain boundaries were absorbed at copper/niobium phase boundaries with increasingniobium content. The corrosion potential and rate in aqueous 30% HCl-10% FeCl3 was-680.3mVSHE and 1.179×10-5A/cra2. The corrosion potential and rate decreasedas increasingniobium content and FeCl3. The yield stress can be described as thesum of the substructure strengthening component due to elongated grains, subgrainsand/or cells, the phase boundary strengthening term associated with the Hall-Petchtype interaction between dislocations and phase boundaries and precipitate strength-ening component.
S.I.Hong1，Y.Choi2，T.W.Lim2
(1.Department of Metallurgical Engineering,Chungnam National University,Taedok Science Town,Daejeon;
2.Department of Metallurgical Engineering,Sunmoon University,Asan Chungnam 336-840,Korea305-764,Korea)
Abstract:Corrosion behavior of heavily drawn bundled Copper-niobium filamentary micro-composite was studied as a function of niobium content to develop the relationshipbetween microstructure and corrosion behavior in aqueous 30% HCl-FeCl3 solution.TEM observation revealed that niobium filaments were distributed regularly in coppermatrix along the sides of a triangular unit cell in the transverse section and more sub-grain boundaries were absorbed at copper/niobium phase boundaries with increasingniobium content. The corrosion potential and rate in aqueous 30% HCl-10% FeCl3 was-680.3mVSHE and 1.179×10-5A/cra2. The corrosion potential and rate decreasedas increasingniobium content and FeCl3. The yield stress can be described as thesum of the substructure strengthening component due to elongated grains, subgrainsand/or cells, the phase boundary strengthening term associated with the Hall-Petchtype interaction between dislocations and phase boundaries and precipitate strength-ening component.
Key words:Cu-Nb micro-composites; corrosion; microstructure;
【全文内容正在添加中】
