Alloying behavior of Ni3M-type GCP compounds

Sugimura, H.; Kaneno, Yasuyuki; Takasugi, Takayuki

doi:10.1016/j.jallcom.2010.02.179

Cited by 27 publications

(13 citation statements)

References 20 publications

(38 reference statements)

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“…2,3) The agreement for the substitution behavior of ternary elements between the prediction and the experimental results was found to be excellent. Later, the same treatment has been conducted on other GCP structures, that is, on Co 3 Ti with L1 2 structure, 4) Ni 3 Nb, Ni 3 Ta, and Ni 3 Mo with D0 a structure, Ni 3 V with D0 22 structure, and Ni 3 Ti with D0 24 structure by the present author's group [4][5][6][7][8] and was shown to be successful in predicting the substitution behavior of ternary elements. Regarding the solubility limits of ternary elements X in Ni 3 Al and Ni 3 Ga with L1 2 structure, a successful prediction was found by Ochiai et al, 1) based on the two-dimensional map, in which the difference in heats of formation between Ni 3 Al (or Ni 3 Ga) and Ni 3 X, and the changing rate of lattice parameter by alloying of Ni 3 Al (or Ni 3 Ga) were taken into calculation as two parameters.…”

Section: Introductionmentioning

confidence: 87%

“…17) We compared the calculated results for Ni 6 SiTi to those for Ni 3 Si with L1 2 structure. 1) In Ni 6 SiTi, Mn (7), Co (9), and Pt (10) have the site preference for the face center (the Ni site) and V, Nb, and Ta (5), Mo (6), Al and Ga (13), and Ge (14) for the cube corner (the Si site or the Ti site).…”

Section: The Substitution Behavior Of Quaternary Elementsmentioning

confidence: 99%

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Alloying Behavior of Quaternary Elements in Ni3(Si,Ti)

2011

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The thermodynamic treatment, which is based on the difference of heat of formation among three extreme cases for the substitution of a quaternary element X, was applied to predict the substitution behavior of quaternary elements in Ni 3 (Si,Ti). The heat of formation of a hypothetical ternary compound Ni 6 SiTi in which X elements substitute for relevant sites was calculated by using a geometric model based on an extended Miedema's theory. According to the prediction, Cr and W (6), Mn and Re (7), Fe and Os (8), Co and Ir (9), Pt (10), and Cu and Au (11) substitute for Ni atoms. Ge (14) substitutes for Si atoms. Zr and Hf (4), V, Nb, and Ta (5), Mo (6), and Al (13) substitute for Ti atoms. Ga (13) substitutes for Si or Ti atom. The prediction for Ta is consistent with the reported experimental result. Also, the solubility limits of quaternary elements for the Ti site in Ni 3 (Si,Ti) are ranked in the sequence of Ta > Nb > V > Hf > Zr, and correlated with the size misfit parameter between Ti and the quaternary element X, and the difference in heats of formation between Ni 6 SiTi and Ni 6 SiX.

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Section: Introductionmentioning

confidence: 87%

Section: The Substitution Behavior Of Quaternary Elementsmentioning

confidence: 99%

Alloying Behavior of Quaternary Elements in Ni3(Si,Ti)

2011

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“…Reported temperatures range between 1173 and 1473 K. The table shows the direction and the extent of solubility limit for each solute element. Fe 24) substitutes for both sites, Co 15,16,18,19) and Cu 23) mostly for Ni-site, and Hf, 15,16) Ta, 15,16) Ti, 15,16,25,26) V, 27) and W 28,29) mostly for Nbsite. The ternary systems with Al, 15,16) with Cr, [20][21][22] and with Si 15,16) did not provide a clear indications of substitution behavior in Ni 3 Nb because of very small solid solubility.…”

Section: Reported Workmentioning

confidence: 99%

“…Therefore, the same thermodynamic treatment as that conducted on L1 2 -type Ni 3 M compound may be applicable to other Ni 3 M-type GCP compounds. Actually, the alloying behavior of D0 a -type Ni 3 Nb, 15,16) D0 22 -type Ni 3 V 16) and D0 24 -type Ni 3 Ti 16) compounds has been investigated and reviewed. Consequently, the agreement for preferable site occupation of the addition between the thermodynamic prediction and the experimental result was found to be excellent.…”

Section: Introductionmentioning

confidence: 99%

Alloying Behavior of Ni3M-Type Compounds with D0a Structure

2011

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The atom substitution preference of ternary additions in Ni 3 M-type GCP (geometrically close-packed) compounds with D0 a structure was determined from the direction of single-phase region of the GCP phase on the reported ternary phase diagrams. In Ni 3 Nb, Co and Cu preferred the substitution for Ni-site, Hf, Ta, Ti, V and W the substitution for Nb-site, and Fe the substitution for both sites. In Ni 3 Ta, Co, Cu, Fe, Ir, Mn and Re preferred the substitution for Ni-site, Mo and Nb the substitution for Ta-site, and Al and Cr the substitution for both sites. In Ni 3 Mo, Pd and W preferred the substitution for Ni-site, and Al, Nb, Ta, Ti and Zr the substitution for Mo-site. The thermodynamic model, which was based on the change in heat of formation of the host compound by a small addition of ternary solute, was applied to predict the atom substitution preference of ternary additions. The heat of compound formation used in the thermodynamic calculation was derived from Miedema's formula. Good agreement was obtained between the thermodynamic model and the result of the literature search. For Ni 3 Mo, with a small negative heat of formation, a weak binding force between the constituent elements is often enhanced by the addition of the ternary elements that substitute for Mo-site.

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“…16) Alloying behavior of Si in Ni 3 Al phase is well known: Si is much soluble, substituting for Al. 17) However, that of Si in Ni 3 V phase is not well known although thermodynamic calculation predicts the substitution of Si for Ni rather than for V. 18) Thus, the effect of Si on the microstructure as well as the mechanical properties of the Ni-based dual two-phase intermetallic alloys has not been well clari ed. Therefore, in this study, we investigate in detail the microstructures and room-temperature mechanical properties such as hardness and tensile properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Si Addition on Microstructure and Mechanical Properties of Dual Two-Phase Ni3Al and Ni3V Intermetallic Alloys

2016

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The effects of Si addition on the microstructures and mechanical properties of dual two-phase Ni 3 Al and Ni 3 V intermetallic alloys with a composition of Ni 75 Al 9 V 13 Nb 3 (expressed by at%) were investigated, focusing on the substitution manner of Si for Ni, Al or V. Solubility limit of Si in the present microstructure was less than 2 at% Si irrespective of the substitution manner of Si for Ni, Al or V. The eutectoid microstructure in the channel region was degenerated when Si was substituted for V. Third-phase dispersions containing Nb, i.e., Ni 16 Si 7 Nb 6 (G phase: D8a) were present at grain boundaries of the alloys exceeding the solubility limit. In the alloy in which Si was substituted for Ni, unit cell volume of the constituent Ni 3 Al phase increased while that of the constituent Ni 3 V phase little changed. In the alloy in which Si was substituted for Al, unit cell volumes of both phases decreased. The alloys in which Si was substituted for Al or Ni hardened while the alloy in which Si was substituted for V softened. The hardening in the former alloys was attributed to solid solution hardening due to Si substituted for solvent atoms Ni, Al and/or V while the softening in the latter alloy was attributed to the degenerated eutectoid microstructure in the channel region. Also, it was shown that the third-phase dispersions little affected hardness as well as yield strength.

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Alloying behavior of Ni3M-type GCP compounds

Cited by 27 publications

References 20 publications

Alloying Behavior of Quaternary Elements in Ni<SUB>3</SUB>(Si,Ti)

Alloying Behavior of Quaternary Elements in Ni<SUB>3</SUB>(Si,Ti)

Alloying Behavior of Ni<SUB>3</SUB>M-Type Compounds with D0<SUB>a</SUB> Structure

Effect of Si Addition on Microstructure and Mechanical Properties of Dual Two-Phase Ni<sub>3</sub>Al and Ni<sub>3</sub>V Intermetallic Alloys

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