Influence of surface topography on the surface durability of steam oxidised sintered iron
AUTOR(ES)
Mello, José Daniel Biasoli de
FONTE
Materials Research
DATA DE PUBLICAÇÃO
2005-06
RESUMO
Durability of surfaces has been reported as the main factor affecting tribological behavior of steam oxidised sintered iron. The presence of surface pores and their negative influence on load bearing capacity, suggest that surface topography might play an important role on the durability of the oxide layer. In this paper, the influence of compaction pressure and powder grade on surface topography, and as a consequence, its effect on the tribological behavior of steam oxidised sintered iron has been analysed. Specimens prepared from atomised iron powders with different sizes were compacted using 4 different pressures, sintered, and then subjected to steam treatment. Tribological characterisation was carried out in a reciprocating sliding wear test. Although the processing parameters affected the surface topography to a considerable extent, the main influence may be attributed to powder grade. A strong influence of surface topography on the durability distance, evaluated in terms of the evolution of contact resistance with total sliding distance, has been highlighted. Surfaces which were smoother and had high load-carrying capacity were always associated with a higher durability distance.
Documentos Relacionados
- Influence of the radial spacing between cathodes on the surface composition of iron samples sintered by hollow cathode electric discharge
- Influence of surface treatment and cyclic loading on the durability of repaired all-ceramic crowns
- Effect of Microstructure on the Thermal Properties of Sintered Iron-copper Composites
- Influence of cephalosporins and iron on surface protein antigens of Klebsiella pneumoniae in vivo.
- Influence of emulsifier content on properties and durability of cutting fluids