Reduction of the coefficient of friction of niobium nitride coatings by the addition of bismuth


Por: Mirabal-Rojas, Roberto, Depablos-Rivera, Osmary, Gomez, Celia L., Fonseca-Garcia, Abril, Medina, Juan C., Barrera-Ortega, Cecilia C., Perez-Alvarez, Jonatan, Muhl, Stephen, Camps, Enrique, Rodil, Sandra E.

Publicada: 1 mar 2016
Resumen:
Composite coatings of niobium nitride containing bismuth inclusions were deposited using a dual magnetron sputtering system with independent power suppliers for each targets; Bi and Nb. The deposition was performed under and Ar/N2 atmosphere at a 2.3 flow rate ratio, which allows the stoichiometric NbN phase to be obtained. The aim of this work was to evaluate the effect of increasing concentrations of Bi, proposed as a lubricous second phase, in the structural, mechanical and tribological properties of niobium nitride (NbN) coatings, searching for a reduction in the coefficient of friction but trying to keep hardness values larger than the tool steels (>10 GPa). The power applied to the Nb target was fixed, while the power on the Bi target was increased; obtaining Bi atomic percentage values of 1.7, 4.9 and 8.4 at%. The Bi inclusions showed different sizes and distribution in the volume and surface of the coatings. The results indicated a reduction in the hardness from 30 GPa of the NbN coating to 13.9 GPa for the highest Bi concentration. However, a more significant reduction was observed for the coefficient of friction (CoF) from 0.8 of the NbN to 0.3 for Bi concentrations between 4.9 and 8.4 at%. © 2015 Elsevier Ltd. All rights reserved.

Filiaciones:
Mirabal-Rojas, Roberto:
 Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N CU, Mexico City 04510, DF, Mexico

 Univ Nacl Autonoma Mexico, Posgrad Ciencia & Ingn Mat, Unidad Posgrad, Zona Cultural CU, Edificio C,Piso 1, Mexico City 04510, DF, Mexico

Depablos-Rivera, Osmary:
 Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N CU, Mexico City 04510, DF, Mexico

 Univ Nacl Autonoma Mexico, Posgrad Ciencia & Ingn Mat, Unidad Posgrad, Zona Cultural CU, Edificio C,Piso 1, Mexico City 04510, DF, Mexico

Gomez, Celia L.:
 Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N CU, Mexico City 04510, DF, Mexico

 Univ Nacl Autonoma Mexico, Posgrad Ciencia & Ingn Mat, Unidad Posgrad, Zona Cultural CU, Edificio C,Piso 1, Mexico City 04510, DF, Mexico

Fonseca-Garcia, Abril:
 Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N CU, Mexico City 04510, DF, Mexico

 Univ Nacl Autonoma Mexico, Posgrad Ciencia & Ingn Mat, Unidad Posgrad, Zona Cultural CU, Edificio C,Piso 1, Mexico City 04510, DF, Mexico

Medina, Juan C.:
 Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N CU, Mexico City 04510, DF, Mexico

 Univ Nacl Autonoma Mexico, Posgrad Ciencia & Ingn Mat, Unidad Posgrad, Zona Cultural CU, Edificio C,Piso 1, Mexico City 04510, DF, Mexico

Barrera-Ortega, Cecilia C.:
 Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N CU, Mexico City 04510, DF, Mexico

Perez-Alvarez, Jonatan:
 Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N CU, Mexico City 04510, DF, Mexico

Muhl, Stephen:
 Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N CU, Mexico City 04510, DF, Mexico

Camps, Enrique:
 Inst Nacl Invest Nucl, Carretera Mexico Toluca S-N,Kilometro 36-5, Municipio De Ocoyoacac 52750, Estado De Mexic, Mexico

Rodil, Sandra E.:
 Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N CU, Mexico City 04510, DF, Mexico
ISSN: 0042207X
Editorial
Elsevier Ltd, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, Reino Unido
Tipo de documento: Article
Volumen: 125 Número:
Páginas: 146-153
WOS Id: 000370096500022

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