Strength and Ductility of Intermetallic Compounds

Pope, D. P.

doi:10.1016/b978-0-12-690845-9.50024-5

Cited by 8 publications

(1 citation statement)

References 96 publications

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“…E r values for IMC_PM and IMC_RS are 441MPa and 408.2 MPa respectively. Note that the reported specific modulus for nickel aluminide is at 450MPa [4]. Not much difference in E r values for both samples even though the fabrication process were different.…”

Section: Resultsmentioning

confidence: 88%

Synthesis of Intermetallic Ni<sub>3</sub>Al Alloy: Properties and High Temperature Oxidation Behaviour

Ismail

Yaacob

2010

AMR

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Two different methods were utilized to synthesize intermetallic nickel aluminide alloy. The first method was combination of powder metallurgy and reaction synthesis (IMC_RS) and the second method was plasma melting to form homogenous plasma melted samples (IMC_PM). XRD patterns for both samples showed complete formation of single phase Ni3Al. Saturation magnetization value for IMC_RS was 0.445 emu/g and IMC_PM was 0.157 emu/g. This was comparable with Ms value of commercial Ni3Al from Alfa Aeser (0.398 emu/g). The reduced elastic modulus, Er value of IMC_PM and IMC_RS were 441.09 MPa. 408.2 MPa respectively. Both samples were exposed to 1%SO2/air gas mixture at 1000oC for 24-hour duration. The isothermal kinetic results for both samples were parabolic indicating rate limiting step. The oxide scales consisted of NiO, NiAl2O4 and Al2O3.

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Section: Resultsmentioning

confidence: 88%

Synthesis of Intermetallic Ni<sub>3</sub>Al Alloy: Properties and High Temperature Oxidation Behaviour

Ismail

Yaacob

2010

AMR

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Third-order bounds on the elastic moduli of metal-matrix composites

Davis

1991

Metall Trans A

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Phase stability and elasticity of C15 transition-metal intermetallic compounds

Chu

Mitchell

Chen

et al. 1997

JPE

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First-principle quantum mechanical calculations based on the local-density-functional theory have been performed to study the electronic, physical and metallurgical properties of C15 intermetallics MV2 (M=Zr, Hf, or Ta). The elastic constants of C15 HfV2+Nb were measured by the resonant ultrasound spectroscopy technique. The phase stability of C15 HfV2+Nb was studied by specific heat measurements and by transmission electron microscopy in a low temperature specimen holder. The total energies and their lattice volume dependence were used to obtain the equilibrium lattice constants and bulk modulus. The band structures at the X-point near the Fermi level were employed to understand the anomalous temperature dependence of shear modulus of the C15 intermetallics. It was found that the double degeneracy with a linear dispersion relation of electronic levels at the X-point near the Fermi surface is mainly responsible for the C15 anomalous elasticity. The density of states at the Fermi level, N(EF), and the Fermi surface geometry were obtained to understand the low temperature phase instability of C15 H N 2 and ZrV2 and the stability of C15 TaV2. It was proposed that the large N(EF) and Fermi surface nesting are the physical reasons for the structural instability of the C15 HfV2 and ZrV2 at low temperatures. The relationship between the anomalous elasticity and structural instability of C15 HfV2 and ZrV2 were also discussed.

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Strength and Ductility of Intermetallic Compounds

Cited by 8 publications

References 96 publications

Synthesis of Intermetallic Ni<sub>3</sub>Al Alloy: Properties and High Temperature Oxidation Behaviour

Synthesis of Intermetallic Ni<sub>3</sub>Al Alloy: Properties and High Temperature Oxidation Behaviour

Third-order bounds on the elastic moduli of metal-matrix composites

Phase stability and elasticity of C15 transition-metal intermetallic compounds

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