|
等径角挤压制备超细晶CNTs/AZ31镁基复合材料研究
|
|
英文标题：Study on preparation of ultra-fine grained CNTs/AZ31 alloy composites by equal channel angular pressing |
|
作者：周国华 曾效舒 徐强 |
|
单位：南昌大学机电工程学院 |
|
关键词：碳纳米管 镁基复合材料 等径角挤压 超细晶 显微硬度 |
|
分类号：TB33 |
|
出版年,卷(期):页码：2009,34(2):106-109 |
|
摘要：
|
|
采用模角为90°的模具对退火处理后的AZ31镁基碳纳米管复合材料进行了等径角挤压实验。结果表明:AZ31镁基碳纳米管复合材料经过一道次的等通道角挤压后,复合材料中就有大量的超细晶粒出现。随着道次数增加,超细晶粒比例逐渐增多。四道次挤压后复合材料晶粒尺寸达到1~5μm,显微硬度得到显著提高。
|
|
Carbon nanotubes/AZ31 alloy composites were prepared by means of equal channel angular pressing(ECAP) and in the die with the intersecting angle φ=90°.The results indicate that a great deal of ultra-fine grains appear in carbon nanotubes/AZ31 alloy composites just after one pass of ECAP.With the increasing of pass number,the proportion of ultra-fine grain increases.With four pressing passes,the grains are effectively refined to a mean size of 1-5μm,and the microhardness of the composites have been enhanced significantly.
|
|
基金项目：
|
|
江西省科技厅攻关项目(z02727)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]刘正,张奎,曾小勤.镁基轻质合金理论基础及其应用[M].北京:机械工业出版社,2002.
[2]Iijima S.Helical microtubules of graphitic carbon[J].Na-ture,1991,354(6348):56-58.
[3]Baughman R H,Zakhidov A A,Heer W A.Carbon nano-tubes-the route toward applications[J].Science,2002,297(5582):787-792.
[4]Deng C f,Wang D Z,Zhang X X,et al.Processing and prop-erties of carbon nanotubes reinforced aluminum composites[J].Mater.Sci.Eng.,2007,(A444):138-145.
[5]Kuzumaki T,Miyazawa K,Ichinose H,et al.Processing ofcarbon nanotube reinforced aluminum composite[J].J.Ma-ter.Res.,1998,13(9):2445-2449.
[6]Kyung T K,Seung I C,Seong H H,et al.Microstructuresand tensile behavior of carbon nanotube reinforced Cu matrixnanocomposites[J].Mater.Sci.Eng.,2006,(A430):27-33.
[7]Wang H Y,Jiang Q C,Wang Y,et al.Fabrication of TiB2particulate reinforced magnesium mat rix composites by pow-der metallurgy[J].Materials Letters,2004,58(27/28):3509-3513.
[8]李淑波,郑明毅,甘为民,等.SiCw/AZ91镁基复合材料及AZ91镁合金的高温变形行为[J].复合材料学报,2005,22(3):103-108.
[9]戚道华,曾效舒,徐春水.碳纳米管/ZM5镁合金复合材料的制备与力学性能研究[J].铸造技术,2007,28(5):676-682.
[10]石凤健.ECAP工艺与材料组织性能控制的研究[D].镇江:江苏大学,2003.
[11]Valiev R Z,Islamgaliev R K,Alexandrov I V.Bulk nano-strucrured materials from severe plastic deformation[J].Progress in Materials Science,2000,(45):103-189.
[12]Li Yuanyuan,Liu Ying,Ngai Tungwai Leo,et al.Effects ofdie angle on microstructures and mechanical properties ofAZ31 magnesiumalloy processed by equal channel angularpressing[J].Trans.Nonferrous Met.Soc.China,2004,14(1):53-57.
[13]李金山,曹海涛,胡锐,等.等径角挤压法制备超细晶的研究现状[J].特种铸造及有色合金,2004,(3):1-3.
[14]毕见强,孙康宁,刘睿,等.剪切应变量对Al-3%Mg多晶材料性能的影响[J].人工晶体学报,2005,34(4):593-596.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
