童慧,胡正飞,张振,祁昌亚,单既万,何大海,莫凡

• 1:同济大学材料科学与工程学院上海市金属功能材料开发应用重点实验室

摘要(Abstract)：

研究AlSi_7Mg/SiCp复合材料中Si C颗粒(SiCp)分散性以及Ca含量对复合材料力学性能的影响,并利用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射(XRD)等微观分析方法研究了不同Ca含量对SiCp分散性的影响。结果表明:SiCp含量在10%~15%时复合材料抗拉强度明显得到提高,当SiCp含量达到20%时复合材料抗拉强度低于母材。不同SiCp含量的拉伸试样断口均为脆性断裂,这和材料中的SiCp簇团、气孔及夹杂有关。Ca的加入会明显影响复合材料的拉伸性能及SiCp在基体中的分散性。Ca含量在0.5%~1.5%时,AlSi_7Mg/SiCp复合材料拉伸性能较好。当Ca含量达到1.5%时,基体中生成一种富含Al、Ca、Si的金属间化合物Ca_2Al4Si_3,并且金属间化合物的数量及尺度大小随着Ca含量的增加而增大,引起SiCp聚集在这些金属间化合物区域内及其边界上,这可能是因为SiCp与金属间化合物间的润湿性好于与基体的润湿性。

关键词(KeyWords)： 铝基复合材料;SiCp;分散性;Ca;力学性能;断口分析

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑计划“高速磁浮交通工程化集成系统研究”(2013BAG19B01)

作者(Author): 童慧,胡正飞,张振,祁昌亚,单既万,何大海,莫凡

DOI: 10.13289/j.issn.1009-6264.2016.12.001

参考文献(References)：

• [1]李敬勇,刘涛,郭宇文.搅拌摩擦加工铝基复合材料的高温摩擦磨损性能[J].材料工程,2015,43(6):21-25.LI Jing-yong,LIU Tao,GUO Yu-wen.High-temperature friction and wear properties of friction stir processed aluminum matrix composites[J].Journal of Materials Engineering,2015,43(6):21-25.
• [2]童慧,胡正飞,张振,等.Si C改性及其在铝基复合材料中的应用[J].金属功能材料,2015,22(1):57-64.TONG Hui,HU Zheng-fei,ZHANG Zhen,et al.Si Cp modification and their application in aluminum matrix composites[J].Metallic Functional Materials,2015,22(1):57-64.
• [3]李沛勇,戴圣龙.高阻尼铝基复合材料的研究动向[J].航空材料学报,2000,20(3):164-171.LI Pei-yong,DAI Sheng-long.Trends in high damping aluminum matrix composites[J].Journalof Aeronautical Materials,2000,20(3):164-171.
• [4]VANAROTTI M,SHRISHAIL P,SRIDHAR B R,et al.Study of mechanical properties&residual stresses on post wear samples of A356-Si C metal matrix composites[J].Procedia Materials Science,2014,5:873-882.
• [5]张鹏,李付国,李惠曲.Si C颗粒增强铝基复合材料的热变形本构方程及其优化[J].航空材料学报,2009,29(1):51-56.ZHANG Peng,LI Fu-guo,LI Hui-qu.Optimization of general constitutive equation for hot deformation of Si C particle reinforced Al matrix composites[J].Journal of Aeronautical Materials,2009,29(1):51-56.
• [6]崔岩.碳化硅颗粒增强铝基复合材料的航空航天应用[J].材料工程,2002(6):3-6.CUI Yan.Aerospace applications of silicon carbide particulate reinforced aluminum matrix composites[J].Journal of Materials Engineering,2002(6):3-6.
• [7]KACZMAR J W,PIETRZAK K,WLOSINSKI W.The production and application of metal matrix composite materials[J].Journal of Materials Processing Technology,2000,106(1/3):58-67.
• [8]宿辉,曹茂盛.微米、纳米Si C表面涂覆、改性的方法及研究现状[J].电镀与精饰,2005,27(6):13-17.SU Hui,CAO Mao-sheng.Method and research status of micron and nanometer Si C surface modification and coating[J].Plating&Finishing,2005,27(6):13-17.
• [9]TJONG S C,MA Z Y.Microstructure characteristics of in situ metal matrix composites[J].Materials Science and Engineering:R,2000,29(3/4):49-113.
• [10]HASHIM J,LOONEY L,et al.Particle distribution in cast metal matrix composites-part I[J].Journal of Materials Processing Technology,2002,123(2):258-263.
• [11]李菊,宫本奎,孙全胜.金属/陶瓷的润湿性[J].山东冶金,2007,29(6):6-9.LI Ju,GONG Ben-kui,SUN Quan-sheng.Wettability of metal-ceramic[J].Shandong Metallurgy,2007,29(6):6-9.
• [12]陈建,潘复生.合金元素影响铝/陶瓷界面润湿性的研究现状[J].兵器材料科学与工程,1999,22(4):53-58.CHEN Jian,PAN Fu-sheng.Present study of effects of alloying elements on the wettability of aluminum/ceramic system[J].Ordnance Material Scienceand Engineering,1999,22(4):53-58.
• [13]PARK S H,HUR B Y.A study of viscosity and surface tension in molten Al and the effect of additional elements[C]//BANHART J,FLECK N A,MORTENSEN A.Cellular Metals:Manufacture,Properties,Applications,Bremen:MIT Verlag,2003:123-128.
• [14]Zhong Li-jun,Wu Jin-bo,Qin Ji-ting.An Investigation on wetting behavior and interfacial reactions of aluminum-α-alumina system[J].The Minerals&Materials Society,1989,12:58-63.
• [15]上野英俊,丛成众.添加钙对熔融铝发泡性的影响[J].轻合金加工技术,1988,7:37-42.SHANGYE Ying-jun,CONG Cheng-zhong.Effect of Ca addition on aluminum foaming property[J].Light Alloy Fabrication Technology,1988,7:37-4.
• [16]杨国俊,姚广春.Ca增粘熔体发泡法制备闭孔泡沫铝的研究[J].轻金属,2006(9):48-50.YANG Guo-jun,YAO Guang-chun.Research of preparing closed-foam aluminum by foaming method of molten aluminum with metallic Ca to increasing viscidity[J].Light Metals,2006(9):48-50.
• [17]吴铿,潜伟,储少军,等.制备泡沫铝时增粘过程的基础研究[J].中国有色金属学报,1998,8(1):80-85.WU Keng,QIAN Wei,CHU Shao-jun.Research of the process of increasing viscosity for producing foam Al[J].The Chinese Journal of Nonferrous Metals,1998,8(1):80-85.
• [18]李兵,姚广春,王永,等.纯铝基泡沫铝材料的制备工艺[J].东北大学学报(自然科学版),2007,28(8):1159-1162.LI Bing,YAO Guang-chun,WANG Yong,et al.On the preparation process of foamed pure aluminum[J].Journal of Northeastern University(Natural Science),2007,28(8):1159-1162.

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