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原位生成AlN-Al3Ti復(fù)合增強(qiáng)鋁基復(fù)合材料研究
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TG113.25

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陜西省教委專項(xiàng)科研基金(02JK118)資助項(xiàng)目


Study of In-situ Composite Reinforced by AlN and Al3Ti
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    摘要:

    研究了AlN-Al3Ti／ZL101原位復(fù)合材料的制備工藝，采用OM，SEM及TEM對該材料的微觀結(jié)構(gòu)進(jìn)行了研究，用MTS800力性試驗(yàn)機(jī)測試了材料的力學(xué)性能。研究表明：在AlN-Al3Ti／ZL101原位復(fù)合材料中，尺寸約為0．5tam的Al3Ti增強(qiáng)相均勻彌散分布于α-Al晶粒內(nèi)部，尺寸為30nm的AlN增強(qiáng)相彌散分布于共晶體內(nèi)部。增強(qiáng)體使α-Al和共晶體明顯細(xì)化，起到強(qiáng)化作用。AlN-Al3Ti／ZL101原位復(fù)合材料中第二相在Al3Ti與α-Al之間存在共格對應(yīng)關(guān)系。AlN相作為共晶硅的異質(zhì)晶核使共晶Si顯著細(xì)化。經(jīng)熱處理后，AlN-Al3Ti／ZLl01復(fù)合材料的室溫拉伸強(qiáng)度達(dá)到369MPa，較基體材料有顯著提高。

    Abstract:

    An advanced method of producing AlN-Al3Ti/ZL101 in-situ composite is described in this paper. The microstructure of the in-situ composite is studied by the analyzing method of OM, SEM and TEM and the mechanical properties of the composite are also tested. The results show that the size of reinforcing phase Al3Ti in the composite is about 0. 5 u,m, which is distributed a-Al matrix uniformly. The size of reinforcing phase A1N is about 30 nm, which distribute inside of eutectic Si. The phase of Al3Ti has the same orientation relationship with a-Al and the phase of A1N has the same orientation relationship with eutectic Si. The tensile strength of AlN-Al3Ti/ZL101 in-situ composite is 369 MPa and it is higher than that of ZL101 matrix.

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趙玉厚 嚴(yán)文 周敬恩 李建平 董晟全.原位生成AlN-Al3Ti復(fù)合增強(qiáng)鋁基復(fù)合材料研究[J].稀有金屬材料與工程,2003,(10):792~795.[Zhao Yuhou, Yan Wen, Zhou Jingen, Li Jianping, Dong Shengquan. Study of In-situ Composite Reinforced by AlN and Al3Ti[J]. Rare Metal Materials and Engineering,2003,(10):792~795.]
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  • 最后修改日期:2002-01-11
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