本文選題：鋁基復合材料　切入點：碳纖維鍍銅　出處：《河南科技大學》2015年碩士論文

【摘要】：碳纖維是目前的熱門材料之一,它的低熱膨脹系數(shù)、高強度、以及耐磨減磨等優(yōu)異性能被用于越來越多的高科技行業(yè)。碳纖維增強的鋁基復合材料具有良好的耐磨性,低的熱膨脹系數(shù),優(yōu)異的導電、導熱性等使其擁有著非常廣闊的應用前景。本文采用粉末冶金的方法制備碳纖維增強的鋁基復合材料,為了避免碳纖維與鋁基體的浸潤性差、易發(fā)生反應等問題的發(fā)生,本文對碳纖維進行了化學鍍銅的研究,優(yōu)化了鍍銅工藝。使用了熱壓法進行復合材料的制備,研究出了合適的熱壓工藝,并對復合材料的拉伸強度、熱膨脹系數(shù)、摩擦系數(shù)、磨損率進行了研究,實驗的結(jié)果表明如下:1.在化學鍍銅中,在電動機械攪拌下,最佳的鍍銅工藝為:CuSO4·5H2O濃度20g/L、EDTA-2Na濃度25g/L、酒石酸鉀鈉濃度25g/L、甲醛15ml/L、二聯(lián)吡啶15mg/L、亞鐵氰化鉀20mg/L、氫氧化鈉16g/L、溫度為60℃、pH值為12、碳纖維加入量為3g/L。2.碳纖維對于鋁基復合材料的硬度、致密度、抗拉強度、熱膨脹系數(shù)、摩擦系數(shù)以及磨損率有著顯著的影響。復合材料的致密度隨著碳纖維的質(zhì)量分數(shù)的增加而下降,而布氏硬度和抗拉強度在碳纖維質(zhì)量分數(shù)為5%時經(jīng)過熱處理達到最高,為HB102.6和278MPa;鋁基復合材料的熱膨脹系數(shù)受碳纖維的加入影響比較大,熱處理后碳纖維質(zhì)量分數(shù)為5%時比無碳纖維添加的復合材料的熱膨脹系數(shù)減小了47.4%;復合材料的摩擦系數(shù)隨著碳纖維質(zhì)量分數(shù)的提升而逐漸減小,在碳纖維質(zhì)量分數(shù)為5%時,復合材料的磨損率達到最小。綜合上述,碳纖維的質(zhì)量分數(shù)為5%時,復合材料的綜合性能最佳。3.碳纖維增強鋁基復合材料的磨損機理主要為磨粒磨損和粘著磨損,碳纖維的增強機理主要為細化晶粒、載荷轉(zhuǎn)嫁和約束機體形變。
[Abstract]:Carbon fiber is one of the most popular materials at present. Its excellent properties such as low thermal expansion coefficient, high strength, wear resistance and wear reduction are used in more and more high-tech industries.Carbon fiber reinforced aluminum matrix composites have good wear resistance, low thermal expansion coefficient, excellent electrical conductivity, thermal conductivity and so on.In this paper, carbon fiber reinforced aluminum matrix composites were prepared by powder metallurgy. In order to avoid the problems of poor wettability and easy reaction between carbon fiber and aluminum matrix, the electroless copper plating of carbon fiber was studied in this paper.The copper plating process was optimized.The hot pressing method was used to prepare the composite material, and the suitable hot pressing process was studied. The tensile strength, thermal expansion coefficient, friction coefficient and wear rate of the composite were studied. The experimental results showed as follows: 1.鍦ㄥ寲瀛﹂晙閾滀腑,鍦ㄧ數(shù)鍔ㄦ満姊版悈鎷屼笅,鏈，

本文編號：1711131