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Ag-Al-O體系中納米Ag形成過程研究
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國家自然科學(xué)基金 (50874054)；國家自然科學(xué)基金云南省聯(lián)合基金項(xiàng)目 (u0837601)；云南省新材料制備與加工重點(diǎn)實(shí)驗(yàn)室開放基金；昆明理工大學(xué)分析測試基金 (2009-002)


Precipitating Process of Nano-Silver in Ag-Al-O Alloy
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    摘要:

    為了研究Al-Ag固溶體在氧化氣氛下熱處理過程中Ag的擴(kuò)散行為與轉(zhuǎn)變過程，采用霧化與高能球磨相結(jié)合的方法制備合金粉末，氧化反應(yīng)合成制備Ag/Al2O3復(fù)合材料，通過BSE、XRD、分子動(dòng)力學(xué)的方法，對形成過程的物相變化進(jìn)行研究。結(jié)果表明： Al-Ag固溶體在600 K能夠?qū)崿F(xiàn)較高的單質(zhì)Ag的析出量，析出的Ag能夠控制在納米尺度內(nèi)，析出過程伴隨著Al2O3致密氧化膜的形成以及內(nèi)部合金相的轉(zhuǎn)變，計(jì)算模型合理地解釋和預(yù)測了實(shí)驗(yàn)結(jié)果

    Abstract:

    In order to investigate the diffusion and transition mechanism of Ag in Ag-Al supersaturated solid during heat treatment in oxidizing atmosphere, Ag/Al alloy powder was prepared by atomization, then Ag/Al2O3 composite was prepared by high energy ball milling and oxidizing reaction. The diffusion rate and the phase state were calculated by the Molecular Dynamics Simulation model of solid solution alloy. The results show that the precipitation of great quantity of Ag occurs at 600 K, accompanied by the formation of compact alumina film and the transition of alloy phase internal particles. The precipitated phase can be controlled in the range of nano size. The experimental results can be explained and predicted properly by the calculated model.

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于 杰,陳敬超,馮 晶,洪振軍,葉 未. Ag-Al-O體系中納米Ag形成過程研究[J].稀有金屬材料與工程,2012,41(4):631~634.[Yu Jie, Chen Jingchao, Feng Jing, Hong Zhenjun, Ye Wei. Precipitating Process of Nano-Silver in Ag-Al-O Alloy[J]. Rare Metal Materials and Engineering,2012,41(4):631~634.]
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  • 收稿日期:2011-04-11
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