Dimensional Changes of Iron and Iron-Copper Powder Compacts During Sintering (Part II):Effects of Additives on Dimensional Changes of Iron-Copper Powder Compacts During Sintering

概要

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It has been shown previously that the sintering of the plain iron powder compacts are accelerated by the small additions of phosphorus, and not accelerated by boron, sulphur or copper.<BR>Moreover, it has been well known that iron-copper, mixtures assume different dimensional changes with the variation of copper contents and this phenomenon is called as "copper growth".<BR>Experimental results have shown that the densification of iron-copper mixtures during sintering is accelerated by the small additions of phosphorus. Therefore, if the addition of phosphorus is enough to offset the expansion of the iron-copper compacts due to the copper growth, both the expansion and the shrinkage of the iron-copper compacts will not be observed by sintering. The addition of Cu3P also has the same effect as phosphorus.
社団法人粉体粉末冶金協会の論文