48Cu36Ag8Al8金屬玻璃微觀結(jié)構(gòu)演化的影響。結(jié)果表明,快速凝固獲得的樣品為典型的非晶態(tài)結(jié)構(gòu)。當(dāng)樣品在703K保溫20分鐘時(shí),均一的非晶基體相分離成兩種非晶合金,即,發(fā)生相分離。由于相分離結(jié)構(gòu)與非晶基體在等溫退火過程是競(jìng)爭(zhēng)的關(guān)系,這個(gè)結(jié)構(gòu)很容易向晶化態(tài)進(jìn)行轉(zhuǎn)變,形成AlZr2 AlAg3相。Zr48Cu36Ag8Al8金屬玻璃的微觀結(jié)構(gòu)在過冷液相區(qū)等溫退火過程中經(jīng)歷了的局部結(jié)構(gòu)轉(zhuǎn)變,相分離以及納米晶轉(zhuǎn)變,這個(gè)過程意味著Zr48Cu36Ag8Al8金屬玻璃的微觀結(jié)構(gòu)對(duì)退火溫度十分敏感。此外,相分離的形成可以加速納米晶的形成。"/>

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過冷液態(tài)Zr48Cu36Ag8Al8塊體非晶合金的相分離及組織演變
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西北工業(yè)大學(xué) 凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室,西北工業(yè)大學(xué) 凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室,西北工業(yè)大學(xué) 凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室,西北工業(yè)大學(xué) 凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室,西北工業(yè)大學(xué) 凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室/西北有色金屬研究院，陜西

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昆明理工大學(xué)分析測(cè)試基金（20130032）；云南省級(jí)(人培)項(xiàng)目（KKSY201351055）


Phase separation and microstructure evolution of Zr48Cu36Ag8Al8 bulk metallic glass in the supercooled liquid region
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State Key laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,State Key laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,State Key laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,State Key laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,State Key laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an/Northwest Institute for Nonferrous Metal Research

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    本文通過x射線衍射(XRD)、差示掃描量熱法(DSC)和透射電子顯微鏡(TEM)研究了退火溫度對(duì)Zr48Cu36Ag8Al8金屬玻璃微觀結(jié)構(gòu)演化的影響。結(jié)果表明,快速凝固獲得的樣品為典型的非晶態(tài)結(jié)構(gòu)。當(dāng)樣品在703K保溫20分鐘時(shí),均一的非晶基體相分離成兩種非晶合金,即,發(fā)生相分離。由于相分離結(jié)構(gòu)與非晶基體在等溫退火過程是競(jìng)爭(zhēng)的關(guān)系,這個(gè)結(jié)構(gòu)很容易向晶化態(tài)進(jìn)行轉(zhuǎn)變,形成AlZr2 AlAg3相。Zr48Cu36Ag8Al8金屬玻璃的微觀結(jié)構(gòu)在過冷液相區(qū)等溫退火過程中經(jīng)歷了的局部結(jié)構(gòu)轉(zhuǎn)變,相分離以及納米晶轉(zhuǎn)變,這個(gè)過程意味著Zr48Cu36Ag8Al8金屬玻璃的微觀結(jié)構(gòu)對(duì)退火溫度十分敏感。此外,相分離的形成可以加速納米晶的形成。

    Abstract:

    The effect of annealing temperature on the microstructure evolution of Zr48Cu36Ag8Al8 bulk metallic glass was investigated by using X-ray diffraction (XRD), differential scanning calorimetry (DSC) and transmission electron microscopy (TEM). Results show that the as-cast Zr48Cu36Ag8Al8 alloy by rapid solidi?cation exhibits a typical characteristic of the amorphous structure. After annealed at 703K / 20min, a homogeneous amorphous matrix was separated into two different glassy phases, namely, phase separation occurred. Because phase separation structure competed with amorphous matrix during isothermal annealing, this structure easily decomposed and transformed into the crystalline phase AlZr2 and AlAg3with annealing temperature increasing. The microstructure of Zr48Cu36Ag8Al8 bulk metallic glass undergoes the local structure difference, phase separation and nano-crystallization during heat treatment in the supercooled liquid region, which implies that the microstructure of Zr48Cu36Ag8Al8 bulk metallic glass is sensitive to the annealing temperature. In addition, the formation of phase separation can accelerate the formation of nano-crystals.

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孫琳琳,王軍,寇宏超,李金山,張平祥.過冷液態(tài)Zr48Cu36Ag8Al8塊體非晶合金的相分離及組織演變[J].稀有金屬材料與工程,2016,45(3):567~570.[Linlin Sun, Jun Wang, Hongchao Kou, Jinshan Li, Pingxiang Zhang. Phase separation and microstructure evolution of Zr48Cu36Ag8Al8 bulk metallic glass in the supercooled liquid region[J]. Rare Metal Materials and Engineering,2016,45(3):567~570.]
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  • 收稿日期:2015-07-20
  • 最后修改日期:2015-09-15
  • 錄用日期:2015-11-18
  • 在線發(fā)布日期: 2016-07-06
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