Etude du reseau de germes dans l'alliage CoPt equiatomique par microscopie electronique et diffraction optique

Eurin, P.; Pénisson, J.M.; Bourret, A.

doi:10.1016/0001-6160(73)90063-1

Cited by 25 publications

(10 citation statements)

References 13 publications

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“…[14,15,16] It has been shown that particles oriented perpendicularly to each other tend to adjust their orientation and the particles oriented parallel tend to stabilize each other. [18] The particles aligned with the habit plane can thus grow at the expense of other particles, which leads to equally spaced habit planes. [18] Under such circumstances, it is possible for inverse ripening to occur, where small particles grow at the expense of large particles and arrays of small particles are stabilized.…”

Section: Alignment Of Fcc Ta Particlesmentioning

confidence: 99%

“…[18] The particles aligned with the habit plane can thus grow at the expense of other particles, which leads to equally spaced habit planes. [18] Under such circumstances, it is possible for inverse ripening to occur, where small particles grow at the expense of large particles and arrays of small particles are stabilized. [14] The choice of habit plane is generally based on strain energy considerations for a particular system.…”

Section: Alignment Of Fcc Ta Particlesmentioning

confidence: 99%

“…[14] The choice of habit plane is generally based on strain energy considerations for a particular system. A {100} habit plane is typical for precipitation in an fcc metal matrix such as Al-Cu, [17] Ni-Al, [18] or Cu-Ta in this study, due to elastic anisotropy of the matrix metals. [15] Platelike precipitates in an anisotropic matrix tend to lay in a plane perpendicular to the minimal Young's modulus, i.e., ͗100͘ for most cubic metals.…”

Section: Alignment Of Fcc Ta Particlesmentioning

confidence: 99%

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Microstructure and mechanical properties of sputter-deposited Cu1−x Ta x alloys

Wang¹,

Zaluzec

Rigsbee

1997

Metall Mater Trans A

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The microstructures and mechanical properties of a family of sputter-deposited Cu 1Ϫx Ta x (0 Ͻ x Ͻ 0.18) alloys have been investigated. The as-deposited microstructures for all film compositions consisted of a polycrystalline, face-centered-cubic (fcc) Cu matrix, with varying levels of Ta in solid solution, plus a very high density of discrete, 1 to 3 nm, fcc Ta particles. Decreased deposition temperature (Ϫ120 ЊC vs 100 ЊC) increased the level of Ta in solid solution. After annealing (900 ЊC for 1 hour) the as-deposited 6 at. pct Ta films, the Cu matrix grains remained submicron and the Ta particles remained fcc with no apparent particle coarsening. Additionally, the fcc Ta particles were found before and after annealing to be oriented identically with the Cu matrix and aligned on {111} and {100} habit planes. Annealing 17 at. pct Ta films at 900 ЊC for 1 hour resulted in the formation of body-centered-cubic (bcc) Ta particles (Ͼ50-nm diameter) in addition to the much smaller fcc Ta particles. Annealing the low and high Ta composition films at 900 ЊC for as long as 100 hours produced no observed change in either the Cu matrix grain size or the size and distribution of the fcc and bcc Ta particles. Microhardness and nanoindentation mechanical property evaluations of bulk hot-pressed materials indicated that the high strengths of the composites were unchanged, even after annealing for 100 hours at 900 ЊC.

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Section: Alignment Of Fcc Ta Particlesmentioning

confidence: 99%

Section: Alignment Of Fcc Ta Particlesmentioning

confidence: 99%

Section: Alignment Of Fcc Ta Particlesmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and mechanical properties of sputter-deposited Cu1−x Ta x alloys

Wang¹,

Zaluzec

Rigsbee

1997

Metall Mater Trans A

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“…(4-6), it follows necessarily that n 1 (l-2n 2 -n 2 )f(n 2 ) = 0 (4-9a) and n 2 (l-2n 2 -n 2 )f(n 1 ) = 0 . Oi-I)>o (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) Therefore, we see that As a result of this type of thorough algebraic calculations, it is possible to derive the following results analytically:…”

Section: + 2c11mentioning

confidence: 82%

“…1 (5)(6)(7)(8) Evaluating Eq. (5-8), it follows that two solutions exist, either n, = 0 2 H or n, = -K. Of course, this is based on the condition that af-eb f 0.…”

Section: + 2c11mentioning

confidence: 99%

Study by elastic theory of the clustering of solute atoms during the early stage of solid solution decomposition

Hong¹

1978

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Khachaturyan's expression for the elastic strain energy of a coherent inclusion of arbitrary shape in an anisotropic medium is derived from both macroscopic and microscopic theoretical approaches. This expression can be simplified for the case of a very thin disk-shaped inclusion, which enables one to analytically calculate the preferred orientations of Guinier-Preston (G.P.) zones in aluminum-copper alloys and carbide precipitates in iron-carbon martensite. The results are in good agreement with the experimental data. However, this thin plate theory breaks down badly when it is applied to the case of thick plate inclusions, such as the nitride precipitate (Fe,gN 2) in iron-nitrogen martensite. A method which takes the thickness effects into account has been developed in order to solve this problem. The calculated minimum strain energy orientation of the disk-shaped nitride precipitate in iron-nitrogen martensite, obtained with this method shows excellent agreement with experimental observation.

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The Effect of Twin Microstructure on the Magnetic Properties of Alloys with CuAul Superlattice Ordering

Kandaurova¹,

Onoprienko²,

Sokolovskaya³

1982

phys. stat. sol. (a)

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The special features of a microstructure of type CoPt alloys are examined. A model of a ferromagnetic crystal with twin microstructure is suggested. The distribution of the magnetization vectors in the twin crystal is obtained. The effect of twin‐oriented domain thickness and of the magnetic field on this distribution is determined. A model of the magnetic domain structure of a stack of twin plates is proposed, taking into account known magnetic domain observation results. The connection between the magnetic domain structure parameters and those of twin microstructure is considered.

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Etude du reseau de germes dans l'alliage CoPt equiatomique par microscopie electronique et diffraction optique

Cited by 25 publications

References 13 publications

Microstructure and mechanical properties of sputter-deposited Cu1−x Ta x alloys

Microstructure and mechanical properties of sputter-deposited Cu1−x Ta x alloys

Study by elastic theory of the clustering of solute atoms during the early stage of solid solution decomposition

The Effect of Twin Microstructure on the Magnetic Properties of Alloys with CuAul Superlattice Ordering

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