The Reaction of Solid Cobalt with Molten Copper. I : The Dissolution of Solid Cobalt into Liquid Copper

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概要

• 論文の詳細を見る

• A basic investigation in brazing has been made of the dissolution of solid cobalt into molten copper under dynamic conditions. Cylindrical specimens of solid cobalt were immersed in molten copper and then rotated under peripheral velocities from 19.0 to 61.5 cm/sec in a temperature range of 1190°〜1340℃. A rapid dissolving of the cobalt into the molten copper had occurred and the appearance of a relatively etched surface was observed. The rate of the dissolution had been found to obey an equation of the reducing rate of the cylinder radius, modifying the first-order kinetic equation. The modified equation was used to determine the dissolution-rate constant, K, . The K-values varied from 0.55 to 1.61×10^<-2> cm/sec and increased in proportion to the 0.64〜0.74 power of peripheral velocity. The activation energy for the dissolution was estimated to be about 10.0 kcal/mole. The activation energy of dissolution for diffusion-controlled process is related to the sum of the activation energy for diffusion and some fraction of the activation energy for viscosity. Calculated value of the activation energy for the diffusion process in the cobalt-copper system is larger than the observed one. The rate of the dissolution of solid cobalt into molten copper is controlled by a mixed process involving interface reaction and diffusion.

• 東北大学の論文

著者

• Ishida Tsuneo

  The Research Institute For Iron Steel And Other Metals

関連論文

• The Brazing Reaction of Iron Base Metal with Copper. I : On the Dissolution of Solid Iron into Molten Copper
• The Reaction of Solid Cobalt with Molten Copper. II : On the Migration of Molten Copper into Solid Cobalt and the Structure of Copper-Cobalt Interface
• The Reaction of Solid Cobalt with Molten Copper. I : The Dissolution of Solid Cobalt into Liquid Copper
• Changes in the Graphite Structures of Flake Graphite and Spheroidal Graphite Cast Irons by the Fusion in a Short Time
• The Reaction of Solid Cobalt with Molten Copper (Report 1) : The Dissolution of Solid Cobalt into Liquid Copper
• The Reaction of Solid Iron with Molten Tin
• The Reaction of Solid Cobalt with Molten Copper (Report 2) : On the Migration of Molten Copper into Solid Cobalt and the Structure of Copper-Cobalt Interface
• The Brazing Reaction of Iron Base Metal with Copper. II : Dissolution Reaction of Iron Base Metal and Migration of Molten Copper into Iron

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