FINITE ELEMENT ANALYSIS FOR THE MIN/MAX DENSITY RATIOS WITHIN COPPER POWDER COMPACTS

초록

Prediction of the density distributions in net-shape-compaction becomes very important and useful. For example, the sintering process, which is usually applied after compacting powdered metals, leads to shrinkage, which is dependent mainly on the density variations within the powdered metal compact. [1] However, dimensional change owing to density distribution of the compacts during sintering is difficult to control by changing the sintering atmosphere. The density variation within a compacted P/M is the results of the non-uniform distribution of compacting pressure within a part, due to the internal (powder-to-powder) friction, external (powder-to-die) friction and length-to-diameter ratio (L/D ratio) of the compact [2].