Long Period Structures and Stacking Faults in Rapidly Solidified Powder Metallurgy (RS P/M) Mg97Zn1Y2 Alloy

被引：0

作者：

Park, Eun Kee ^{[1
]}

Kim, Woo Jung ^{[1
]}

Kim, Taek Soo ^{[2
]}

Lee, Kap Ho ^{[1
]}

机构：

[1] Chungnam Natl Univ, Div Nano Technol, Daejeon 305764, South Korea

[2] Korea Inst Ind Technol, Incheon 406130, South Korea

来源：

KOREAN JOURNAL OF MATERIALS RESEARCH | 2009年 / 19卷 / 08期

基金：

瑞士国家科学基金会;

关键词：

Mg-Zn-Y alloy; rapidly solidified powder metallurgy (RS P/M); long period stacking order (LPSO) structure; stacking fault (SF); high resolution transmission electron microscopy (HRTEM);

D O I：

10.3740/MRSK.2009.19.8.447

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The long-period stacking order (LPSO) structures and stacking faults (SFs) in rapidly solidified powder metallurgy (RS P/M) Mg97Zn1Y2 alloy were investigated by high resolution transmission electron microscopy (HRTEM) observations. The 18R-type LPSO structure with a stacking sequence of ACBCBCBACACACBABAB and a period of 4.86 nm was observed in the as-extruded RS P/M Mg97Zn1Y2 alloy. After annealing at 773 K for 5 hr, the 18R-type LPSO structure was transformed to the 14H-type LPSO structure with a stacking sequence of ABABABACBCBCBC and a period of 3.64 nm. The 24R-type LPSO structure containing 24 atomic layers of ABABABABCACACACABCBCBCBC with period of 6.18 nm coexists with the 14H-type LPSO structure in the same grains. The LPSO structures contain intrinsic Type II SFs such as BCB/CABA and ABA/CBCB stacking sequences of a closely packed plane.

引用

页码：447 / 451

页数：5

共 17 条

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