采用离心铸造工艺制备初晶硅和Mg_2Si颗粒混合增强铝基骤变复合材料,采用光学显微镜、X射线衍射仪、硬度计等对此复合材料组织与性能进行了研究.结果表明:该复合材料分为增强层(内层)与非增强层(外层),两层之间存在明显的宏观界线,内层偏聚了大量的初晶硅与Mg_2Si颗粒,而外层仅有极少量的颗粒;从内层到外层,硬度呈现先降低后升高趋势;在小载荷下,内层与外层耐磨性能差异显著,而在大载荷下,两者差异微弱;初晶硅颗粒显著提高了复合材料在小载荷下的耐磨性,Mg_2Si颗粒提高磨损性能的作用次之.
Al-based sudden change composites reinforced with mixture of primary Si and Mg_2 Si particles were prepared by centrifugal casting Microstructure and properties of the composites were investigated by using optical microscopy,XRD and haxdness tester.The results show that there were two layers including enforcement layer (inner layer) and un-reinforced layer (outer layer).Microscopic boundary between the two layers was obvious.Plenty of primary Si and Mg2_Si segregated in the inner layer,and only a few of particles in the outer layer.The hardness showed increasing trendency from inner layer to outer layer.The wear resistance difference between inner layer and outer layer was big under small load,but small under large load.The effect of the reinforcement primary Si particles on wear resistance improvement was more remarkable than that of Mg_2 Si particles.
参考文献
| [1] | Sandeep S. Ahankari;Kamal K. Kar .Processing and characterization of functionally graded materials through mechanical properties and glass transition temperature[J].Materials Letters,2008(19):3398-3400. |
| [2] | 谭银元.离心铸造Al-16wt%Si合金自生梯度复合材料[J].复合材料学报,2002(05):47-51. |
| [3] | 王渠东,陈勇军,陈文周,魏胤红,翟春泉,丁文江.离心铸造Zn-Al-Mg-Si合金及其自生表面复合材料[J].上海交通大学学报,2005(07):1109-1114. |
| [4] | 李克,王俊,周鸣,张雪萍,孙宝德,周尧和.过共晶铝硅自生梯度复合材料的组织与性能[J].中国有色金属学报,2002(03):521-524. |
| [5] | Q.D. Qin;Y.G. Zhao;P.J. Cong .Functionally graded Mg_2Si/Al composite produced by an electric arc remelting process[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2006(1/2):121-125. |
| [6] | Q.D. Qin;Y.G. Zhao;PJ. Cong .Multi-layer functionally graded Mg_2Si/Al composite produced by directional remelting and quenching process[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):193-198. |
| [7] | 朱诚意,李光强,张峰,彭其春,刘君.金属/陶瓷复合材料的原位合成及其结构研究[J].机械工程材料,2006(01):33-35,39. |
| [8] | Tamura D;Nagai R;Sugimoto K;Udono H;Kikuma I;Tajima H;Ohsugi IJ .Melt growth and characterization of Mg2Si bulk crystals[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2007(22):8272-8276. |
| [9] | LIU Hong,ZHAO Gang,LIU Chun-ming,ZUO Liang.Effects of magnesium content on phase constituents of Al-Mg-Si-Cu alloys[J].中国有色金属学会会刊（英文版）,2006(02):376-381. |
| [10] | J.Zhang;Z.Fan .MICROSTRUCTURAL EVOLUTION OF THE IN SITU Al-15wt%Mg_2Si COMPOSITE WITH EXTRA Si CONTENTS[J].Scripta materialia,2000(11):1101-1106. |
| [11] | 孙继兵,李国彬,崔春翔,安雅琴.原位自生成陶瓷相增强铝基复合材料磨损特性的研究[J].机械工程材料,2003(05):32-35. |
| [12] | 李俊宪,孙保良,邵光杰.SiC颗粒增强铝基复合材料的摩擦磨损性能[J].机械工程材料,2006(05):62-65. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%