Abstract
μ-PIM is a promising technology for micro-manufacture, by which complex structured micro components can be produced economically. In this paper, iron micro gear arrays with different diameters were produced by μ-PIM. The influence of die temperature (T m), the injection pressure (P i) and the injection speed (V i) on the replication quality has been studied. The results showed that the replication quality was mainly affected by the T m. Micro gears with best shape retention were obtained when T m was set to be 80°C, P i for 100 MPa and V i for 60 cm3/s. The green compacts were debinded and subsequently sintered. Micro gears with good shape retention and 0.0053 wt. % residual carbon were obtained after debinding and sintering process. The micro hardness turned out 8 GPa measured by a nano-mechanical test instrument.
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