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Wear Behavior of Ductile Cast Irons with Nanoparticles Additives

Journal of Chemistry and Chemical Engineering 2013年第11期7卷 1044-1049页

作者： Julieta Kaleicheva Mara Kandeva Valentin Mishev zdravka kirilova karaguiozova Technical University of Sofia Sofia 81000 Bulgaria Space Research and Technology Institute Bulgarian Academy of Sciences Sofia 11113 Bulgaria

The work in this study is focused on the investigation of the structure and properties of ductile cast iron with nanoparticle additives： TiN （titanium nitride）, TiN ＋ TiCN （titanium carbonitride） and cBN （cubic boron nitride）. The nanoparticles are coated with nickel prior to addition to the iron melt to improve their wetting and uniform distribution in the volume of the casting. The metallographic observation and wear test are performed to study the influence of the nanoparticle additives on the microstructure and and cast iron tribological properties.

关键词： Nanoparticle metallographic observation hardness wear cast iron.

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Composite Ni-Nanodiamond Coating Deposited by Electroless Method

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Journal of Chemistry and Chemical Engineering 2012年第7期6卷 599-603页

作者： J. Kaleicheva zdravka kirilova karaguiozova E. Lyubchenko M. Kandeva V. Mishev S. Stavrev Technical University of Sofia boulevard Kliment Ohridski 8 Sofia 1000 Bulgaria Space Research and Solar-Terrestrial Research Institute Bulgarian Academy of Sciences Sofia 1000 Bulgaria Kharkov Polytechnical Institute National Technical University Kharkov 61002 Ukraine

The work in this study is focused on investigation of composite nickel coatings. The coatings were deposited on ductile cast iron samples of different composition by electroless method EFTTOM NICKEL with addition of strengthening nanodiamond particles （2-4 nm）, The samples were prepared by casting and austempering. The microstructure, microhardness and wear resistance of the coatings were investigated. The thickness of the coatings was also determined （8-10μm）. Metallographic analyses, SEM （scanning electron microscopic） investigation, microhardness measurements by knoop method, wear resistance tests were carried out. The coatings with and without heat treatment at 290℃, 6 h were tested. Duplication of microhardness value and improvement of the coating＇s properties of heat treated coatings were observed.

关键词： Nanodiamond composite electroless nickel coating ductile cast iron.

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