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鋁含量對(duì)鋁熱合成FeNiCrAl/NiAl顯微結(jié)構(gòu)的影響
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國(guó)家自然科學(xué)基金資助（51072011）


Influence of Al Content on the Microstructure of FeNiCrAl/NiAl Alloy Prepared by Thermite Reaction
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    摘要:

    研究了Al含量變化對(duì)鋁熱反應(yīng)合成FeNiCrAl/NiAl合金微觀組織的影響。結(jié)果表明隨著Al含量的增加，NiAl金屬間化合物和FeNiCrAl呈現(xiàn)不同的組織形態(tài)：當(dāng)鋁含量較低時(shí)，NiAl相在晶粒內(nèi)部以顆粒形式存在，在晶界處呈板條狀結(jié)構(gòu)；隨著鋁含量增加，首先在晶界處形成編織狀結(jié)構(gòu)進(jìn)而擴(kuò)展至晶粒內(nèi)部，最終形成完整的編織狀結(jié)構(gòu)；當(dāng)Al含量進(jìn)一步增加時(shí)，編織結(jié)構(gòu)尺寸不斷減小，直至在晶粒內(nèi)部消失，并對(duì)這一組織形態(tài)變化原因做了闡述。

    Abstract:

    The influence of Al content on the microstructure of FeNiCrAl/NiAl composite prepared by thermite reaction was studied. The results show that the NiAl intermetallic compound and the FeNiCrAl present different microstructures morphologies with increasing of Al content. When the Al content is low, NiAl phase exists as particulate inside the grains, and as lath structure in the grain boundary. With the increase of Al content, the intertexture structure first appearing near the grain boundary extends into the grains. Finally a consistent intertexture structure is formed. However, with the further increase of Al content, the size of intertexture structure decreases and even disappears inside the grains. The reason of these microstructure morphology changes was discussed.

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席文君,魏 然,王海靜,李樹(shù)杰.鋁含量對(duì)鋁熱合成FeNiCrAl/NiAl顯微結(jié)構(gòu)的影響[J].稀有金屬材料與工程,2014,43(4):836~840.[Xi Wenjun, Wei Ran, Wang Haijing, Li Shujie. Influence of Al Content on the Microstructure of FeNiCrAl/NiAl Alloy Prepared by Thermite Reaction[J]. Rare Metal Materials and Engineering,2014,43(4):836~840.]
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  • 收稿日期:2013-04-19
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  • 在線發(fā)布日期: 2014-07-30
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