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Title:Microchemistry of copper infiltrated iron powder compacts
Author(s):Ganguly, Bidyut Kumar
Department / Program:Physics
Discipline:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):iron powders compacts
Abstract:Iron powders compacts infiltrated with an copper-cobaltzinc mixture (New Jersey Zinc 2044 infiltrant) were analyzed by the electron microprobe for distribution of the iron, copper and cobalt. It was found that the copper contains a few percent dissolved iron distributed uniformly and the iron grain containff several percent copper. There was also observed the segregation of cobalt in a thin (1-2 μm) layer at the interface. Since this interface was too thin for detailed analysis by the electron microprobe, thick interfaces were prepared by irmnersing iron plates in liquid infiltrant at 2050°F for times between 1 and 25 hours. These samples had thicker regions between the iron and copper where cobalt was found to be segregated (Co level as high as 30%). The grains of iron were found to be separated from the plate by the action of copper penetrating down the grain boundaries. This interface material was found to be very hard. Tensile specimens made from the infiltrated compacted powders were subjected to tension inside the scanning electron microscope. Deformation of the polished surface of the compact was observed in the scanning electron microscope while an increasing load was applied to the specimen from outside and it was found that deformation of the iron grains was more readily observed than that of the copper infiltrant as there were evidences of heavy slipping in the iron. Slip line fonnation in the iron was found to be followed by the tilting of copper grains which were sliding at the grain boundaries simultaneously. The fractures of samples slow cooled from the infiltration temperature were ductile.
Issue Date:1971
Genre:Dissertation / Thesis
Type:Text
Language:English
URI:http://hdl.handle.net/2142/46440
Rights Information:©1971 Bidyut Kumar Ganguly
Date Available in IDEALS:2013-12-12
Identifier in Online Catalog:5963135


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