Structural-phase transformations in a Cu3Pt alloy during atomic ordering

Potekaev, A. I.; Кулагина, В. В.; Chaplygina, A. A.; Popova, L. A.; Старостенков, М. Д.; Клопотов, А. А.

doi:10.1007/s11182-013-9953-3

Cited by 17 publications

(2 citation statements)

References 13 publications

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“…The diffusion of atoms occurred on the vacancy mechanism of Monte Carlo method. State of the alloy changed at discrete points in time, in a single iteration takes one act of self-diffusion, the corresponding jump in the atom in the vacant site [5].…”

Section: Model Of the Computer Simulationmentioning

confidence: 99%

Details of the Formation of Superstructures in the Process of Ordering in Cu-Pt Alloys

Старостенков

Chaplygina

Romanenko

2013

KEM

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Alloys of Cu-Pt [1] are of interest for research, since the phase transitions "order - disorder" at different concentrations of components form several types of superstructures. In the alloy Cu3Pt the ordering L12 superstructure formed on the basis of fcc lattice. In the ordering of the fcc lattice of the disordered solid solution the equiatomic composition transformed into the L11 superstructure with an rhombohedral crystal lattice (a state with an L11, whose angles α, β, and γ are other than π/2). A CuPt3 in an ordered state has an L13 superstructure (a state with an L13, whose angles α, β, and γ are other than π/2). A possible existence of an ordered phase containing 20 at.% Pt was reported in the literature [2], which corresponds to the composition of Cu4Pt (type of superstructure was not defined). In other sources, an occurrence of an ordered compound, Cu7Pt, was predicted, containing 12.5 at.% Pt [3]. Computer experiments performed on the Monte Carlo method, showed that the alloys of the Cu - Pt different composition components undergo phase transformations "disorder - order" from the FCC to the structures of different symmetry [4,11]. This paper presents the results of a study of the structural transformations in the alloys Cu3Pt, CuPt, CuPt3 (superstructure L12, L11, L13), containing shear antiphase boundaries (APB) in the planes {111}.

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Section: Model Of the Computer Simulationmentioning

confidence: 99%

Details of the Formation of Superstructures in the Process of Ordering in Cu-Pt Alloys

Старостенков

Chaplygina

Romanenko

2013

KEM

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“…In the works [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] the new concepts were developed to describe the conditions of formation of transient-stability condensed systems and their structure. The materials under study are generally the alloys and compounds that undergo second-order structural phase transitions.…”

Section: Introductionmentioning

confidence: 99%

Deformation behavior of perfect and imperfect nanomaterials made of intermetallic compounds with bcc lattice

Babicheva¹,

Старостенков²,

Zhou³

2014

LoM

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The paper reviews the literature devoted to the stress-strain behavior of nanomaterials made of NiAl and FeAl intermetallics having B2 superstructure with body-centered cubic (bcc) lattice. Such nanomaterials demonstrate elastic deformation up to the point of their failure. In a concave region of a strain dependence of the potential energies P(ε), the materials demonstrate thermodynamic instability and the non-homogeneous elastic deformation which is accompanied by the appearance of domains of two strain levels. Stretching behavior of NiAl and FeAl nanomaterials depends on lattice defects and sample geometry. An introduction of lattice defects which result in an appearance of residual stresses in structures can lead to the nanomaterial strengthening.

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