Cu-Sn-Pb合金のメカニカルグラインディングによる組織変化
1995 年 42 巻 9 号 p. 1063-1067
詳細
1995 年 42 巻 9 号 p. 1063-1067
A high energy type ball-milling machine for mechanical grinding (MG) was used to examine its effectiveness of redistributing the insoluble slolute of Pb in the Cu-Sn-Pb alloy powders and the structures of these MG powders were also discussed. The sufficiently deformed and pulverized powders were attained after a milling time of about 20hr, and composed substantially from the crystallites of Cu and Pb the diameter of which was about 10nm. In some parts of these powders, an amorphous-like structure could be observed by TEM but not by XRD. The formation of stacking faults during milling was confirmed in Cu by pesk shifts of (111)Cu and(200)Cu reflections of XRD. The result of DSC measurements carried out on the MG powders showed the stored energy in the MG powders was estimated to be about 3 kJ/mol irrespective of Sn content and less than one-third of the mixing free energy of the supercooled liquid Cu-Pb alloy.
