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攪拌摩擦加工制備Al3Ni-Al原位反應(yīng)復(fù)合體
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西北工業(yè)大學(xué)科技創(chuàng)新基金（2007KJ01006）


In-Situ Synthesized Al3Ni-Al Composites by Friction Stir Processing
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    摘要:

    通過在攪拌摩擦加工（Friction Stir Processing，F(xiàn)SP）過程中填加微米級Ni粉的方法，利用Al、Ni在FSP條件下的快速原位反應(yīng)，在Al合金1100-H14表面層獲得Al3Ni-Al復(fù)合體。采用SEM、EDS以及XRD對表面復(fù)合體微觀結(jié)構(gòu)及相組成進(jìn)行分析，并對其顯微硬度進(jìn)行評測。結(jié)果表明，在FSP強(qiáng)烈的熱、力耦合作用下，Ni粉產(chǎn)生了充分碎化，破碎后的Ni粒子與Al產(chǎn)生快速原位反應(yīng)，生成亞微米甚至納米級Al3Ni顆粒，而少量微米級殘留Ni顆粒被 Al3Ni包裹，并與細(xì)小的Al3Ni顆粒一同均勻分布于Al合金基體中，從而使得表面復(fù)合體的硬度顯著提高，其平均值達(dá)到了818.3 MPa，為基體硬度的2.4倍。

    Abstract:

    By means of adding micron Ni powder in the Friction Stir Processing (FSP) period and the resultant rapid in-situ reaction between Al and Ni under FSP condition, Al3Ni-Al composites were obtained on Al alloy 1100-H14 surface layer. The microstructures of the surface composites were analyzed by SEM and EDS, the phase composition was examined by XRD, and the microhardness was also measured. Results show that Ni powder was broken sufficiently under the severe thermal-mechanical coupling of FSP, and the broken Ni in-situ reacted with Al matrix rapidly to produce sub-micron or even nano particles of Al3Ni; while a few micron particles of residual Ni were covered by Al3Ni layer and homogeneously distributed in Al matrix with fine Al3Ni particles. Therefore, the microhardness of the composites increased greatly and reached to 818.3 MPa, 2.4 times of that of Al alloy 1100-H14.

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熊江濤,張賦升,李京龍,錢錦文,黃衛(wèi)東.攪拌摩擦加工制備Al3Ni-Al原位反應(yīng)復(fù)合體[J].稀有金屬材料與工程,2010,39(1):139~143.[Xiong Jiangtao, Zhang Fusheng, Li Jinglong, Qian Jinwen, Huang Weidong. In-Situ Synthesized Al3Ni-Al Composites by Friction Stir Processing[J]. Rare Metal Materials and Engineering,2010,39(1):139~143.]
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  • 收稿日期:2009-01-21
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