화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.19, No.8, 447-451, August, 2009
DOI10.3740/MRSK.2009.19.8.447  Export Citation
급속응고 분말법으로 제조된 Mg97Zn1Y2 합금의 장주기 구조와 적층결함
Long Period Structures and Stacking Faults in Rapidly Solidified Powder Metallurgy (RS P/M) Mg97Zn1Y2 Alloy
박은기, 김우정, 김택수1, 이갑호†
  • 충남대학교 공과대학 나노공학부
  • 1한국생산기술원 신소재본부
Eun Kee Park, Woo Jung Kim, Taek Soo Kim1, and Kap Ho Lee2, †
  • Division of Nano Technology,, Chungnam National University, Daejeon 305-764, Korea
  • 1Korea Institute of Industrial Technology, Techno-Park Songdo, Incheon 406-130, Korea
  • 2Division of Nano Technology, Chungnam National University, Daejeon 305-764, Korea
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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.
Keywords: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)
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