Glass Forming Ability and Crystallization Behavior in Amorphous Ti_<50>Cu_<32-x>Ni_<15>Sn_3Be_x (x=0, 1, 3, 7) Alloys

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The thermal stability and crystallization behavior of melt spun Ti<SUB>50</SUB>Cu<SUB>32−<I>x</I></SUB>Ni<SUB>15</SUB>Sn<SUB>3</SUB>Be<I><SUB>x</SUB></I> (<I>x</I>=0, 1, 3, 7) amorphous alloys were investigated by differential scanning calorimetry (DSC), X-ray diffractometry(XRD) and transmission electron microscopy (TEM). With increasing Be content, <I>x</I> from 0 to 7, <I>ΔT</I><SUB>x</SUB> gradually decreased from 73 to 45 K, but <I>T</I><SUB>rg</SUB> increased from 0.53 to 0.57. With increasing Be content, crystallization behavior changes from two exothermic events (<I>x</I>=0, 1) to three exothermic events (<I>x</I>=3, 7). Amorphous Ti<SUB>50</SUB>Cu<SUB>32</SUB>Ni<SUB>15</SUB>Sn<SUB>3</SUB> phase crystallizes by transforming into Ti(Ni,Cu) and Ti<SUB>2</SUB>Ni phases, followed by transformation into a mixture of Ti(Ni,Cu), TiCu, and Ti<SUB>3</SUB>Sn phases. Amorphous Ti<SUB>50</SUB>Cu<SUB>25</SUB>Ni<SUB>15</SUB>Sn<SUB>3</SUB>Be<SUB>7</SUB> phase crystallizes by precipitation of a few nanometer scale crystalline phase followed by decomposition into a mixture of Ti(Ni,Cu), TiCu, Ti<SUB>3</SUB>Sn and TiBe<SUB>12</SUB> phases at high temperature. Partial replacement of Cu by Be in Ti–Cu–Ni–Sn alloy improved the glass forming ability. A fully amorphous rod of the Ti<SUB>50</SUB>Cu<SUB>25</SUB>Ni<SUB>15</SUB>Sn<SUB>3</SUB>Be<SUB>7</SUB> alloy with a diameter of 2 mm was fabricated by injection casting.

収録刊行物

  • Materials transactions

    Materials transactions 43(5), 1243-1246, 2002-05-01

    公益社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10012324004
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    13459678
  • NDL 記事登録ID
    6181559
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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