Influence of abrasive wear modes on the coefficient of friction on thin films
| Autor: | Ronaldo Câmara Cozza, Cláudio Geraldo Schön, Jorge Thiago de Sousa Lima Wilcken |
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| Rok vydání: | 2018 |
| Předmět: |
Coefficient of friction
Materials science Thin films Abrasive 02 engineering and technology 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports 0203 mechanical engineering Rolling abrasion Thin film Composite material Abrasion 0210 nano-technology Grooving abrasion FRICÇÃO |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Biblioteca Digital de Teses e Dissertações da FEI Centro Universitário da Fundação Educacional Inaciana (FEI) instacron:FEI |
| Popis: | The purpose of this work is to study the influence of abrasive wear modes on the coefficient of friction (μ) of thin films. Initially, free rotative-ball micro-abrasive wear testing equipment was designed and constructed to measure the coefficient of friction on the tribological system “thin film – abrasive slurry – test sphere”. Experiments were conducted with thin films of TiN, CrN, TiAlN, ZrN, TiZrN, TiN/TiAlN, TiN/TiAlN (multi-layer), TiHfC and TiHfCN using a ball of AISI 52100 steel and abrasive slurries prepared with black silicon carbide (SiC) particles and glycerine. The aim of this design was to produce “grooving abrasion” and “rolling abrasion” on the surface of thin films. The normal force (N) and the tangential force (T) were monitored throughout the tests, and the coefficient of friction was calculated as μ = T/N. Aside from the thin film type, e.g., for all thin films studied, the results that have been obtained in this work show that the abrasive slurry concentration affected the abrasive wear modes (“grooving abrasion” or “rolling abrasion”) and, consequently, the magnitude of the coefficient of friction: i) a low abrasive slurry concentration was related with grooving abrasion and a relatively high coefficient of friction; ii) a high abrasive slurry concentration was related with rolling abrasion and a relatively low coefficient of friction. 15 4 504 509 |
| Databáze: | OpenAIRE |
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