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INFLUENCE OF ABRASIVE WEAR MODES ON THE COEFFICIENT OF FRICTION OF THIN FILMS

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Tipo de produção

Artigo

Data de publicação

2018-11-05

Texto completo (DOI)

Periódico

TECNOLOGIA EM METALURGIA, MATERIAIS E MINERAÇÃO

Editor

Texto completo na Scopus

Citações na Scopus

Autores

Ronaldo Câmara Cozza
WILCKEN, JORGE THIAGO DE SOUSA LIMA
SCHÖN, CLÁUDIO GERALDO

Orientadores

Resumo

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.

Citação

COZZA, R. C.; WILCKEN, J. T. DE S. L.; SCHÖN, C. G. Influence of abrasive wear modes on the coefficient of friction of thin films. TECNOLOGIA EM METALURGIA, MATERIAIS E MINERAÇÃO, v. 15, n. 4, p. 504-509, 2018.

Palavras-chave

Abrasion; Grooving abrasion; Rolling abrasion; Thin films; Coefficient of friction

Keywords

Assuntos Scopus

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