caracterizaciÓn tribolÓgica de recubrimientos de nÍquel quÍmico-teflÓn obtenidos en un baÑo con diferentes perÍodos de envejecimiento
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2007
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Abstract
Los recubrimientos de níquel químico (NQ) constituyen un tratamiento superficial de altas prestaciones funcionales. La incorporación de micropartículas de teflón (PTFE) da lugar a la formación de un "composite" (NQ-PTFE) consistente en partículas de teflón (PTFE) de tamaño micrométrico, uniformemente embebidas en una matriz de NQ. De esta manera, el recubrimiento resultante combina las propiedades de dureza del NQ con las excelentes propiedades de lubricación del teflón. En el presente trabajo se presentan los resultados de la caracterización tribológica de diferentes recubrimientos con la estructura sustrato NQ/NQ-PTFE depositados sobre acero al carbono, con una proporción de teflón presente en el NQ-PTFE de alrededor del 20 %. Los ensayos se realizaron en un tribómetro de bola sobre disco contra bola de alúmina, mediante los cuales se determinó el coeficiente de fricción. Se discuten los resultados de los recubrimientos NQ-PTFE obtenidos en distintas condiciones del baño químico y se comparan con los obtenidos para recubrimientos simples de NQ.
Electroless nickel coating (EN) is a highly functional engineered finish. A "composite" coating (EN-PTFE) of electroless nickel and PTFE (Teflon) is formed when PTFE micro-particles are uniformly dispersed throughout the coating. The resulting coating combines the corrosion resistance and hardness of EN with the excellent release properties and lubricity of PTFE. In this work we present the results of the tribological characterization of different coatings with a PTFE content of about 20 % and a structure Substrate EN-PTFE deposited on steel. The tribological characterization was conducted in a ball-on-disk tribometer using an alumina ball from which the friction coefficients were determined. The results for different ENPTFE coatings are discussed and compared to those obtained for simple EN coatings.
Electroless nickel coating (EN) is a highly functional engineered finish. A "composite" coating (EN-PTFE) of electroless nickel and PTFE (Teflon) is formed when PTFE micro-particles are uniformly dispersed throughout the coating. The resulting coating combines the corrosion resistance and hardness of EN with the excellent release properties and lubricity of PTFE. In this work we present the results of the tribological characterization of different coatings with a PTFE content of about 20 % and a structure Substrate EN-PTFE deposited on steel. The tribological characterization was conducted in a ball-on-disk tribometer using an alumina ball from which the friction coefficients were determined. The results for different ENPTFE coatings are discussed and compared to those obtained for simple EN coatings.
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| Authors | ;Maryory Astrid Gómez;Joan Esteve;Arturo Lousa |
| Journal | applied mathematics letters |
| Year | 2007 |
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