(1. 南昌航空大學(xué) 輕合金加工科學(xué)與技術(shù)國防重點學(xué)科實驗室，南昌 330063；
2. 西北工業(yè)大學(xué) 凝固技術(shù)國家重點實驗室，西安 710072)
摘 要: 采用旋轉(zhuǎn)摩擦擠壓加工方法制備體積分?jǐn)?shù)分別為0、3.8%、4.5%和5.3%(體積分?jǐn)?shù))的碳納米管增強(qiáng)鋁基復(fù)合材料線材，進(jìn)行復(fù)合材料線材顯微組織觀察和力學(xué)、電學(xué)性能分析。結(jié)果表明：經(jīng)旋轉(zhuǎn)摩擦擠壓后，復(fù)合材料線材的晶粒較攪拌摩擦加工試樣有所拉長和長大，但仍為超細(xì)晶結(jié)構(gòu)；復(fù)合材料線材中的碳納米管沿著擠壓方向呈取向排列均勻分布于鋁基體中。隨著碳納米管體積分?jǐn)?shù)的增加，復(fù)合材料線材的顯微硬度、抗拉強(qiáng)度以及電阻率均逐漸增加，且均高于同CNTs體積分?jǐn)?shù)的攪拌摩擦加工塊體復(fù)合材料試樣，但塑性有所降低。
關(guān)鍵字: 旋轉(zhuǎn)摩擦擠壓；碳納米管；CNTs/Al復(fù)合材料
（1. National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 330063, China;
2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China）
Abstract:Carbon nanotubes (CNTs) reinforced aluminum matrix composite wires containing 0, 3.8%, 4.5% and 5.3% CNTs (volume fraction) were prepared by rotational friction extruded processing (RFEP). The microstructures, mechanical property and electric property were characterized by scanning electron microscopy and transmission electron microscopy. The results show that the grains of composite wires are elongated and grow after RFEP, but the grain size is still remained in extra fine scale. CNTs are homogenously distributed in the aluminum matrix, and some CNTs are orientational aligned along the extrusion direction in the composites. With the content of the CNTs increasing, the microhardness, tensile strength and electrical resistivity increase, respectively, and all of these are higher than those of FSP composite blocks.
Key words: rotational friction extruded processing; carbon nanotube; CNTs /Al composite
