Novel way of amorphous phase formation during mechanical alloying of copper and cadmium powders

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作者：

Univ of Waikato, Hamilton, New Zealand ^{[1
]}

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来源：

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science | 1998年 / 29 A卷 / 09期

关键词：

Ball milling - Cadmium - Copper - Differential scanning calorimetry - Free energy - Mechanical alloying - Phase equilibria - Phase interfaces - Powder metals - X ray diffraction analysis;

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摘要：

Phase formation during high-energy ball milling of copper and cadmium powders has been investigated. Both X-ray diffractometry (XRD) and differential scanning calorimetry (DSC) have been used to characterize the resulting phases. An amorphous phase forms during milling in the copper-cadmium system by a reaction between the equilibrium δ phase and one of the constituent metals (copper). However, the amorphous phase cannot be produced by a direct reaction between the copper and cadmium powders, nor by milling of a powder consisting of only the δ phase. It appears most likely that the contribution from the generated copper/δ interfaces, and the accompanying increase in the total free energy, provide the additional driving force for the amorphous phase formation in this system.

引用

页码：2425 / 2432