Development of optimum process parameters and a study of the effects of surface roughness on brazing of copper

• Main Authors: Tuan Zahari, Tuan Zaharinie, Huda, Z., Izuan, M.F., Abd Shukor, Mohd Hamdi
• Format: Article
• Language: English
• Published: Elsevier 2015
• Subjects: T Technology (General); TJ Mechanical engineering and machinery
• Online Access: http://eprints.um.edu.my/13953/1/Development_of_optimum_process_parameters_and_a_study_of_the.pdf; http://eprints.um.edu.my/13953/; http://www.sciencedirect.com/science/article/pii/S0169433215001026

Brazing experiments on commercially-pure copper plates, using brazing filler metal (MBF-2005), are conducted at temperatures in the range of 650-750 degrees C for time-durations in the range of 5-15 min. Shear tests for braze-joints involved use of a universal testing machine. Based on the shear-test results, a new brazing cycle has been developed that corresponds to the greatest shear strength of the braze-joint. The brazing cycle has been performed under a controlled dry-argon atmosphere in a tube furnace. Microscopic observations were made by use of both optical and electron microscopes; whereas surface roughness measurements were made by using a TRIO Surface Roughness Tester. It is found that successful brazing and good wetting can be achieved by the least voids by using an average surface roughness (R-a, value) for the base material. (C) 2015 Elsevier B.V. All rights reserved.