Microstructure of spark-plasma sintered TiB/sub 2/-Cu nanocomposites

The goal of this study is to investigate the evolution of microstructure of TiB/sub 2/ -60 wt.% Cu nanocomposite and titanium diboride nanoparticles behavior during spark-plasma sintering. One of the current problems facing material science is the production of bulk materials with fine nano-level mi...

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Bibliographic Details
Main Authors: Dudina, D.V., Korchagin, M.A., Lomovsky, O.I., Kwon, Y.-S.
Format: Conference Proceeding
Language:English
Subjects:
Alloying
Ball milling
Copper
Materials science and technology
Microstructure
Nanoparticles
Nanostructured materials
Powders
Production
Titanium
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Summary:The goal of this study is to investigate the evolution of microstructure of TiB/sub 2/ -60 wt.% Cu nanocomposite and titanium diboride nanoparticles behavior during spark-plasma sintering. One of the current problems facing material science is the production of bulk materials with fine nano-level microstructure. Methods of mechanical alloying and mechanical treatment are widespread and well known for making it possible producing a great variety of composite powders with nano-level grains or inclusions. Ti-B-Cu powder mixtures were mechanically treated in high-energy planetary ball mill AGO-2 with stainless steel balls and vials. Balls of 5 mm diameter were used. The powder/balls weight ratio was 1/20 in all experiments. Before milling the vials were pumped and filled with argon to prevent oxidation during processing. To study the connectivity between TiB/sub 2/ particles we removed copper matrix from the surface of SPS-compacts by electrochemical etching and formed a layer. X-ray phase analysis shows that this layer consists of titanium diboride as the major phase with small amounts of TiBO/sub 3/ probably formed as a result of electrochemical reaction.
DOI:10.1109/SPCMTT.2003.1438179