Experimental redetermination of the Cu-Pd phase diagram

被引：24

作者：

Popov, A. A. ^{[1
]}

Shubin, Yu. V. ^{[1
,2
]}

Plyusnin, P. E. ^{[1
,2
]}

Sharafutdinov, M. R. ^{[3
]}

Korenev, S. V. ^{[1
,2
]}

机构：

[1] RAS, Nikolaev Inst Inorgan Chem, SB, Novosibirsk, Russia

[2] Novosibirsk State Univ, Novosibirsk, Russia

[3] RAS, Inst Solid State Chem & Mechanochem, SB, Novosibirsk, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 777卷

基金：

俄罗斯基础研究基金会;

关键词：

Copper; Palladium; Nanoalloys; Phase diagram; Experimental X-ray study; PD/CU ALLOY; CATALYTIC-ACTIVITY; PALLADIUM; MEMBRANES; TRANSFORMATION; NANOPARTICLES; TRANSITION; MECHANISM; KINETICS; STATE;

D O I：

10.1016/j.jallcom.2018.10.332

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The equilibrium Cu-Pd phase diagram has been experimentally reinvestigated in the 300-680 degrees C temperature region by powder XRD involving a high-temperature technique. To reduce the annealing time needed for the system to attain the equilibrium state, nanosized specimens with a characteristic crystallite size of 5-15 nm were used initially. All previously reported phases, i.e., a disordered face-centered cubic solid solution Cu1-xPdx (A1), a one-dimensional long-period superlattice structure Cu21Pd7 (1D-LPS), intermetallic compounds Cu3Pd (L1(2)) and CuPd (B2), except a two-dimensional long-period superlattice structure (2D-LPS), could be confirmed. Homogeneity ranges of all solid phases existing in the Cu-Pd system were determined at distinct temperatures. The largest deviation of the solubility limits was observed for the Pd-rich boundary of the Cu3Pd region (25-30 at.% Pd) and the Cu-rich boundary of the Cu1-xPdx region in the compositional range >55 at.% Pd. Based on the present experimental results, the constitutional Cu-Pd diagram was modified. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：204 / 212

页数：9

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