Investigation of the order -disorder phase transition series in AuCu by in-situ temperature XRD and mechanical spectroscopy

被引：10

作者：

Lamiri, Imene ^{[1
,2
,4
,5
]}

Martinez-Blanco, David ^{[3
]}

Abdelbaky, Mohammed S. M. ^{[4
]}

Mari, Daniele ^{[5
]}

Hamana, Djamel ^{[1
,2
]}

Garcia-Granda, Santiago ^{[4
]}

机构：

[1] Mentouri Univ, Res Unit Mat Sci & Applicat, Constantine 25000, Algeria

[2] Ecole Natl Polytech Constantine, Constantine 25000, Algeria

[3] Univ Oviedo, Sci Tech Serv, E-33006 Oviedo, Spain

[4] Univ Oviedo, CINN, Dept Phys & Analyt Chem, E-33006 Oviedo, Spain

[5] Ecole Polytech Fed Lausanne, IPHYS, Stn 3, CH-1015 Lausanne, Switzerland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 770卷

关键词：

XRD; AuCu alloy; Phase transitions; Mechanical spectroscopy; GRAIN-BOUNDARY RELAXATION; INDUCED ANELASTICITY; TRANSFORMATION; MORPHOLOGY; KINETICS; GROWTH; ALLOY; GA;

D O I：

10.1016/j.jallcom.2018.08.094

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：

In-situ temperature XRD and mechanical spectroscopy were applied to study phase transitions in AuCu alloy from the disordered FCC state (A1). The phase transition temperature intervals were investigated upon heating and cooling using a rate of 1 K/min in order to be thoroughly determined. The following sequences of phase transitions were recorded upon continuous heating: A1->AuCuI ->AuCuII->A1 and on subsequent cooling: A1 ->A1+AuCuI+AuCuII ->AuCuI+AuCuII ->AuCuI. This transition sequences determine also temperature dependency of elastic and anelastic properties. Mechanical spectroscopy using a forced torsion pendulum shows a peak due to antiphase boundaries motion characterizing the orthorhombic phase AuCuII and a transient peak with the that appears in the tetragonal phase AuCuI together with the classical Zener peak in the A1 phase. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：748 / 754

页数：7