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Experimental investigation of the Cu–Si phase diagram at x(Cu)>0.72
Intermetallics ( IF 4.4 ) Pub Date : 2011-10-01 , DOI: 10.1016/j.intermet.2011.05.017
Katarzyna Sufryd 1 , Norbert Ponweiser 2 , Paola Riani 1 , Klaus W Richter 2 , Gabriele Cacciamani 1
Affiliation  

Cu–Si phase equilibria have been investigated at compositions greater than 72 at.% Cu by X-ray diffraction, optical and electronic microscopy, electron probe microanalysis and differential thermal analysis. The general aspects of the phase equilibria already reported in literature have been substantially confirmed, but selected composition ranges and the nature of a few invariant equilibria have been modified. In particular stability ranges of the β, δ and η phases have been slightly modified as well as temperature and nature of the invariant equilibria related to the γ ⇄ δ transformation. Stability of the ɛ-(Cu15Si4) phase has been especially investigated concluding that it is thermodynamically stable but kinetically inhibited by nucleation difficulties which become especially effective when samples are synthesized in very high purity conditions. Crystal structure and composition ranges of the high temperature β and δ phases, despite difficulties by the non-quenchability of these phases, have been investigated by different methods including high temperature XRD.

中文翻译:

x(Cu)>0.72时Cu-Si相图的实验研究

已经通过 X 射线衍射、光学和电子显微镜、电子探针微量分析和差热分析在大于 72 at.% Cu 的成分下研究了 Cu-Si 相平衡。文献中已经报道的相平衡的一般方面已得到充分证实,但选定的组成范围和一些不变平衡的性质已被修改。特别是 β、δ 和 η 相的稳定性范围以及与 γ ⇄ δ 转变相关的不变平衡的温度和性质已略有修改。已经特别研究了 ɛ-(Cu15Si4) 相的稳定性,结论是它在热力学上是稳定的,但在动力学上受到成核困难的抑制,当样品在非常高纯度的条件下合成时,这种困难变得特别有效。
更新日期:2011-10-01
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