Direct evidence for Suzuki segregation obtained by high-resolution analytical electron microscopy

Kamino, Takeo; Ueki, Y.; Hamajima, Hideki; Sasaki, Katsuhiro; Kuroda, Kotaro; Saka, Hiroyasu

doi:10.1080/09500839208206009

Cited by 26 publications

(1 citation statement)

References 3 publications

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“…4,5) This phenomenon was observed in various alloy systems. 6,7) In 2001, a dual phase magnesium (Mg) alloy with a nominal composition of Mg-1Zn-2Y (at%) composed of a LPSO structured phase and an α-Mg phase was discovered to exhibit a tensile yield strength of more than 600 MPa and an elongation to fracture of 5%. 8) Since then, attention has been focused on developing high-strength Mg-based alloys containing LPSO, which promotes kink strengthening mechanisms.…”

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Electronic origin of phase stability in Mg–Zn–Y alloys with a long-period stacking order

Tsumuraya

Momida

Oguchi

2022

Appl. Phys. Express

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The origin of the phase stability of 18R Mg–Zn–Y alloys with a long-period stacking order (LPSO) is studied using first-principles calculations. We calculate the heat of formation as a function of the number of Zn vacancies to discuss the role of Zn atoms. The calculated convex hull indicates that the Zn atoms in the LPSO alloys are stable even if they number about half of the Y atoms. The bonding state with Zn p orbitals leads to the stability of the LPSO structure because the partial density of states of Mg nearest to the solute cluster forms a valley structure.

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Electronic origin of phase stability in Mg–Zn–Y alloys with a long-period stacking order

Tsumuraya

Momida

Oguchi

2022

Appl. Phys. Express

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Profilometry‐Based Indentation Plastometry at High Temperature

Tammpere,

McKeown,

Miller

et al. 2024

Adv Eng Mater

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This is a first report on profilometry‐based indentation plastometry (PIP) at high temperature (HT), covering both thermal characterization and issues for obtaining stress–strain curves. The heating system has a relatively low thermal inertia, reaching 800 °C within about 10 min, while both indentation (≈20 s) and cooling (≈20 min) are also quick. This capability is useful in terms of limiting exposure of the sample to prolonged periods at HT, and hence avoiding the formation of thick oxide layers (which can affect indent profiles and hence inferred stress–strain curves). There is good general consistency between stress–strain curves obtained via HT‐PIP and those from tensile testing. However, the possibility of creep (time‐dependent deformation) affecting the outcomes (of both types of test), particularly at higher temperatures, should be borne in mind. Creep has a characteristic effect on tensile curves, which can often be confirmed and investigated by changing the imposed strain rate. It can also be revealed by carrying out the HT‐PIP testing with different penetration velocities or by monitoring the shape of the load–displacement plot.

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Novel compositional accommodation mechanism in SrNbO₃ epitaxial thin films revealed by analytical electron microscopy

Takeno

Ohara

Sano

et al. 2003

Surface & Interface Analysis

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A novel compositional accommodation mechanism in perovskite (ABO 3 ) SrNbO 3 thin films was revealed by field-emission analytical electron microscopy (AEM). A new analytical methodology for estimating localized structures such as planar faults is also presented. The method was applied for investigating the compositional accommodation mechanism of B-ion-rich SrNbO 3 epitaxial thin films. Two types of accommodation mechanism -formation of B-ion-rich amorphous phase and (110)-located high-density planar defects -were revealed. The latter mechanism is a new finding for B-ion-rich perovskites.

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Direct evidence for Suzuki segregation obtained by high-resolution analytical electron microscopy

Cited by 26 publications

References 3 publications

Electronic origin of phase stability in Mg–Zn–Y alloys with a long-period stacking order

Electronic origin of phase stability in Mg–Zn–Y alloys with a long-period stacking order

Profilometry‐Based Indentation Plastometry at High Temperature

Novel compositional accommodation mechanism in SrNbO₃ epitaxial thin films revealed by analytical electron microscopy

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Direct evidence for Suzuki segregation obtained by high-resolution analytical electron microscopy

Cited by 26 publications

References 3 publications

Electronic origin of phase stability in Mg–Zn–Y alloys with a long-period stacking order

Electronic origin of phase stability in Mg–Zn–Y alloys with a long-period stacking order

Profilometry‐Based Indentation Plastometry at High Temperature

Novel compositional accommodation mechanism in SrNbO3 epitaxial thin films revealed by analytical electron microscopy

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Novel compositional accommodation mechanism in SrNbO₃ epitaxial thin films revealed by analytical electron microscopy