Microstructural features induced by spray forming of a ternary Pb–Sn–Sb alloy

Srivastava, V C and Upadhyay, A and Ojha, S N (2001) Microstructural features induced by spray forming of a ternary Pb–Sn–Sb alloy. Bulletin of Materials Science, 23 (2). pp. 73-78.

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An alloy containing Pb–12% Sn–12% Sb with small addition of copper and arsenic was spray deposited employing two different atomization gas pressure and nozzle to substrate distances. The temperature of the spray-deposit was measured during deposition at a distance of 2 and 10 mm above the substrate-deposit interface. Thermal profile data indicated small variation in temperature with time during deposition stage whereas during post deposition stage an exponential decrease in temperature was recorded. Second phase particle size along the thickness of the deposit varied from 4 to 8 μm compared to 70 to 80 μm size of these particles in the as cast alloy. Maximum porosity occurred in the section of the deposit near the contact surface of the substrate and also in its peripheral regions. X-ray diffraction analysis exhibited the formation of additional Cu2Sb phase in the spray-deposit and CuSn and Cu3×3Sb phases in atomized powders compared to that of the as cast alloy. The microstructural evolution during spray deposition of this alloy is discussed.

Item Type:Article
Official URL/DOI:http://www.ias.ac.in
Uncontrolled Keywords:Spray forming; thermal profile; microstructure; second phase; porosity.
Divisions:Metal Extraction and Forming
ID Code:1490
Deposited By:Dr. V.C. Srivastava
Deposited On:26 Aug 2010 14:28
Last Modified:17 Feb 2012 16:17
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