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Zr-Ti-Cu-Ni-Be大塊非晶合金等溫晶化過程相分離研究
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TG146.4

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Phase Separation of Zr-Ti-Cu-Ni-Be Bulk Amorphous Alloy during Isothermal Annealing
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    摘要:

    利用差示掃描量熱法(DSC)和透射電鏡(TEM)對Zr41.2Ti13.8Cu12.5Ni10Be22.5(at％)大塊非晶合金的等溫晶化過程和析出相進(jìn)行了研究。結(jié)果表明，大塊非晶合金在等溫晶化過程中表現(xiàn)出多階段相析出行為，并且在不同的晶化階段，析出相也有所不同。在第1個(gè)晶化階段，析出相主要是體心四方(b.c．t)結(jié)構(gòu)的Zr2Cu相；而在晶化的第2個(gè)階段，晶化相主要為簡單六方結(jié)構(gòu)的ZrBe2相。從一定程度上證實(shí)了Zr41.2Ti13.8Cu12.5Ni10Be22.5大塊非晶合金在發(fā)生晶化時(shí)會形成富Zr區(qū)和富Be區(qū)，即有相分離的趨勢。XRD測試的結(jié)果也證實(shí)了非晶合金在發(fā)生完全晶化時(shí)，主要的晶化產(chǎn)物為Zr2Cu和ZrBe2相。

    Abstract:

    Employing differential scanning calorimetry (DSC) and transmission electron microscopy (TEM), the isothermal crystallization process and precipitated phases of Zr41.2Ti13.8Cu12.5Ni10Be22.5 (at%) bulk amorphous alloy were investigated. It is found that the bulk amorphous alloy exhibited a multi-stage crystallization behavior when being isothermal annealed. The precipitated phases are different at various crystallization stages. The experiment results show that the main precipitation phase is body-centered tetragonal (b.c.t) Zr2Cu at the first crystallization stage but primitive hexagonal ZrBe2 at the second stage, confirming that the Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk amorphous alloy possesses a phase separation tendency during the isothermal annealing processes. The X-ray diffraction (XRD) result validated that the main precipitation phases were Zr2Cu and ZrBe2 when the bulk amorphous alloy was fully crystallized.

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沈軍 高玉來 孫劍飛 陳德民 王剛 邢大偉 周彼德. Zr-Ti-Cu-Ni-Be大塊非晶合金等溫晶化過程相分離研究[J].稀有金屬材料與工程,2004,33(12):1257~1260.[Shen Jun, Gao Yulai, Sun Jianfei, Chen Demin, Wang Gang, Xing Dawei, Zhou Bide. Phase Separation of Zr-Ti-Cu-Ni-Be Bulk Amorphous Alloy during Isothermal Annealing[J]. Rare Metal Materials and Engineering,2004,33(12):1257~1260.]
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  • 最后修改日期:2003-03-31
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