transmission electron microscopy;
rare earth;
phase transition;
ferroelastic;
Gd5Si2Ge2;
D O I:
10.1016/S1359-6454(02)00227-6
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
The material Gd-5(SixGe1-x)(4), with x=1/2 was investigated using transmission electron microscopy. The material possesses a complex crystallographic structure and undergoes a unique, reversible, transformation at low temperatures and an irreversible high temperature transformation. The high, room and low temperature microstructures of arc-melted and heat treated samples are reported. Direct observation of the transformation with a discussion on the mechanism of the reversible, low temperature, phase transformation is detailed. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
机构:
Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USANatl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan
Paudyal, D.
Mudryk, Ya
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机构:
Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USANatl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan
Mudryk, Ya
Pecharsky, V. K.
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机构:
Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USA
Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USANatl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan
Pecharsky, V. K.
Gschneidner, K. A., Jr.
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机构:
Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USA
Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USANatl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan
机构:
Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China
Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China