Local Structural Evolution of Mechanically Alloyed Mg50Co50 Using Atomic Pair Distribution Function Analysis

被引：14

作者：

Kim, Hyunjeong ^{[1
]}

Nakamura, Jin ^{[1
]}

Shao, Huaiyu ^{[1
]}

Nakamura, Yumiko ^{[1
]}

Akiba, Etsuo ^{[1
]}

Chapman, Karena W. ^{[2
]}

Chupas, Peter J. ^{[2
]}

Proffen, Thomas ^{[3
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Energy Technol Res Inst, Tsukuba, Ibaraki 3058565, Japan

[2] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[3] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 15期

关键词：

PHASE-TRANSFORMATION; HIGH-RESOLUTION; HYDROGEN; DETECTOR;

D O I：

10.1021/jp111711c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Milling-time-dependent local structural evolution of mechanically alloyed Mg50Co50 was investigated by the atomic pair distribution function analysis using both neutron and synchrotron X-ray powder diffraction data. The initial powder mixture was composed of three phases: hexagonal close-packed (hcp) Mg, hcp Co, and face-centered cubic (fcc) Co. As milling progressed, rather rapid reduction in crystallite sizes of hcp Mg and hcp Co along with the formation of the Mg50Co50 phase was observed. Meanwhile, size reduction in the fcc Co phase was found to be relatively gradual, accompanied by heavy strain. Mg50Co50 forms at the early stage of milling and bears an amorphous nature.

引用

页码：7723 / 7728

页数：6

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