第3期 陈汉宾等：放电等离子烧结制备A一Z一MgCu纳米晶合金的组织 .297. fabricated by ECA pressing combined with thermal treatment. [11]Park Y S.Chung K H,Kim NJ,et al.Microstructural investi- Mater Charact.2003,49:455 gation of nanocrystalline bulk Al-Mg alloy fabricated by cry- [5]Liang G X.LiZ C.Wang E.et al.Structural change of rapidly omilling and extrusion.Mater Sci Eng A.2004.374:211 solidified 2024 aluminum alloy powder in mechanical milling and [12]王洪斌，刘慧敏，黄进蜂，等.热处理对喷射成形超高强度A1 subsequent consolidation process.Mater Process Technol.1996. -Z一MgCu系铝合金的影响.中国有色金属学报，2004,14 58:247 (3):398 [6]Hu L.LiZ.Wang E.Influence of extrusion ration and tempera [13]刘慧敏，郝斌，杨滨·原位TC颗粒细化喷射沉积7075铝合 ture on microstructure and mechanical properties of 2024 alu- 金组织的机理.北京科技大学学报，2006,28(4)：369 minum alloy consolidated from nanocrystalline alloy powders via [14]郝广瑞，王洪斌，黄进峰.喷射成形超高强度A1一Z一MgCu hot hydrostatic extrusion.Powder Metall.1999.42:153 合金的固溶处理.北京科技大学学报，2004,26(5)：502 [7]Tellkamp V L.Lavernia E J.Processing and mechanical proper- [15]Tokita M.Trends in advanced SPS spark plasma sintering sys- ties of nanocrystalline 5083 Al alloy.NanoStruct Mater.1999. tems and technology.J Soc Powder Technol Jpn.1993.30. 12,249 790 [8]Witkin D.Lee Z.Rodriguea R.et al.Al-Mg alloy engineered [16]Mondal C.Mukhopadhyay A K.On the nature of T with bimodal grain size for high strength and increased ductility. (Al2Mg3Zn3)and S(Al2Cu Mg)phases present in as cast and an- Scripta Mater.2003,49:297 nealed 7055 aluminum alloy.Mater Sci Eng A.2005,391:367 [9]Zhou F,Liao X Z.Zhou Y T,et al.Microstructural evolution [17]Tokita M.Mechanism of spark plasma sintering /Proceeding of during recovery and reerystallization of a nanocrystalline Al-Mg NEDO international Symposium on Functionally Graded Materi- alloy prepared by cryogenie ball milling Acta Mater,2003.51: als.Tokyo,1999,23 2777 [18]宋晓艳，刘雪梅，张久兴.放电等离子烧结中显微组织演变 [10]Zhou F,Witkin D,Nutt S R,et al.Formation of nanostructure 的自调节机制.中国体视学与图像分析，2004,9(3)：140 in Al produced by a low-energy ball milling at eryogenic tempera [19]Li W,Gao L.Rapid sintering nanocrystalline ZrO2(3Y)by ture.Mater Sci Eng A.2004.375-377:917 spark plasma sintering.J Eur Ceram Soc.2000.20:2441 Microstructure of a bulk nanocrystalline AlZn-MgCu alloy prepared by cry- omilling and spark plasma sintering CHEN Hanbin,CHENG Junsheng,YANG Bin),ZHANG Jishan,FAN Jianzhong?), TIAN Xiaofeng） 1)State Key Laboratory for Advanced Metals and Materials.University of Science and Technology Beijing.Beijing 100083.China 2)International Center for Materials Physics.Chinese Academy of Sciences,Shenyang 110016.China 3)Beijing General Research Institute for Nonferrous Metals,Beijing 100088.China ABSTRACI A bulk nanocrystalline Al Zn Mg Cu alloy was produced by cryomilling and spark plasma sinter- ing.The grain size,the microstrain,phase transformation and microstructure of this alloy were investigated by X ray diffraction(XRD)and transmission electron microscopy (TEM).The results show that the bulk nanocrystalline 7000 aluminum alloy prepared by spark plasma sintering has two types of distinctive nanostruc tures:primarily equiaxed grains with diameters of 50-100nm,and a few of larger grains with diameters of 200-400 nm.The precipitate of second phases,mainly including n(MgZnz)and a few (AlzCu)and S(Al2CuMg),and recrystallization of the bulk nanocrystalline 7000 aluminum alloy were found during the con- solidation process by SPS. KEY WORDS aluminum alloy;cryomilling:spark plasma sintering;microstructurefabricated by ECA pressing combined with thermal treatment． Mater Charact‚2003‚49：455 ［5］ Liang G X‚Li Z C‚Wang E‚et al．Structural change of rapidly solidified2024aluminum alloy powder in mechanical milling and subsequent consolidation process．Mater Process Technol‚1996‚ 58：247 ［6］ Hu L‚Li Z‚Wang E．Influence of extrusion ration and tempera￾ture on microstructure and mechanical properties of 2024 alu￾minum alloy consolidated from nanocrystalline alloy powders via hot hydrostatic extrusion．Powder Metall‚1999‚42：153 ［7］ Tellkamp V L‚Lavernia E J．Processing and mechanical proper￾ties of nanocrystalline 5083 Al alloy．NanoStruct Mater‚1999‚ 12：249 ［8］ Witkin D‚Lee Z‚Rodriguea R‚et al．Al－Mg alloy engineered with bimodal grain size for high strength and increased ductility． Scripta Mater‚2003‚49：297 ［9］ Zhou F‚Liao X Z‚Zhou Y T‚et al．Microstructural evolution during recovery and recrystallization of a nanocrystalline Al－Mg alloy prepared by cryogenic ball milling．Acta Mater‚2003‚51： 2777 ［10］ Zhou F‚Witkin D‚Nutt S R‚et al．Formation of nanostructure in Al produced by a low-energy ball milling at cryogenic tempera￾ture．Mater Sci Eng A‚2004‚375－377：917 ［11］ Park Y S‚Chung K H‚Kim N J‚et al．Microstructural investi￾gation of nanocrystalline bulk Al－Mg alloy fabricated by cry￾omilling and extrusion．Mater Sci Eng A‚2004‚374：211 ［12］ 王洪斌‚刘慧敏‚黄进峰‚等．热处理对喷射成形超高强度 Al －Zn－Mg－Cu 系铝合金的影响．中国有色金属学报‚2004‚14 （3）：398 ［13］ 刘慧敏‚郝斌‚杨滨．原位 TiC 颗粒细化喷射沉积7075铝合 金组织的机理．北京科技大学学报‚2006‚28（4）：369 ［14］ 郝广瑞‚王洪斌‚黄进峰．喷射成形超高强度 Al－Zn－Mg－Cu 合金的固溶处理．北京科技大学学报‚2004‚26（5）：502 ［15］ Tokita M．Trends in advanced SPS spark plasma sintering sys￾tems and technology．J Soc Powder Technol Jpn‚1993‚30： 790 ［16］ Mondal C‚ Mukhopadhyay A K． On the nature of T （Al2Mg3Zn3） and S（Al2CuMg） phases present in as-cast and an￾nealed7055aluminum alloy．Mater Sci Eng A‚2005‚391：367 ［17］ Tokita M．Mechanism of spark plasma sintering∥Proceeding of NEDO international Symposium on Functionally Graded Materi￾als．Tokyo‚1999‚23 ［18］ 宋晓艳‚刘雪梅‚张久兴．放电等离子烧结中显微组织演变 的自调节机制．中国体视学与图像分析‚2004‚9（3）：140 ［19］ Li W‚Gao L．Rapid sintering nanocrystalline ZrO2（3Y） by spark plasma sintering．J Eur Ceram Soc‚2000‚20：2441 Microstructure of a bulk nanocrystalline Al－Zn－Mg－Cu alloy prepared by cry￾omilling and spark plasma sintering CHEN Hanbin 1）‚CHENG Junsheng 1）‚Y A NG Bin 1‚2）‚ZHA NG Jishan 1）‚FA N Jianz hong 2）‚ TIA N Xiaofeng 2） 1） State Key Laboratory for Advanced Metals and Materials‚University of Science and Technology Beijing‚Beijing100083‚China 2） International Center for Materials Physics‚Chinese Academy of Sciences‚Shenyang110016‚China 3） Beijing General Research Institute for Nonferrous Metals‚Beijing100088‚China ABSTRACT A bulk nanocrystalline Al－Zn－Mg－Cu alloy was produced by cryomilling and spark plasma sinter￾ing．The grain size‚the microstrain‚phase transformation and microstructure of this alloy were investigated by X－ray diffraction （XRD） and transmission electron microscopy （TEM）．The results show that the bulk nanocrystalline7000aluminum alloy prepared by spark plasma sintering has two types of distinctive nanostruc￾tures：primarily equiaxed grains with diameters of 50－100nm‚and a few of larger grains with diameters of 200－400nm．The precipitate of second phases‚mainly including η（ MgZn2） and a few θ（Al2Cu） and S（Al2CuMg）‚and recrystallization of the bulk nanocrystalline7000aluminum alloy were found during the con￾solidation process by SPS． KEY WORDS aluminum alloy；cryomilling；spark plasma sintering；microstructure 第3期 陈汉宾等： 放电等离子烧结制备 Al－Zn－Mg－Cu 纳米晶合金的组织 ·297·