利用扫描电镜(SEM)并配合能谱(EDS)分析研究了超高压凝固Mg-6Zn-3Y合金的晶体形态和相演变.实验结果表明:随着凝固压力的增大,α-Mg晶体的形态发生了粗大树枝晶→超细树枝晶→胞状晶转变,即晶体的生长方式逐渐由树枝晶生长→胞状生长过渡.GPa级超高压下凝固极大地提高了Zn在基体中的溶解度,使之成为过饱和固溶体,并随着凝固压力的增大促使Zn的分布趋于均匀化.Mg-6Zn-3Y合金在2 GPa超高压凝固条件下形成了新相Y固溶体,室温组织由4相组成；在6 GPa超高压凝固条件下大量粒状相均匀弥散地分布在基体上,Mg-6Zn-3Y合金的硬度显著提高.
参考文献
| [1] | Qu Y D,Li R D,Yuan X G,Li C X,Xiang Q C.Foundry,2005; 54:539(曲迎东,李荣德,袁晓光,李晨曦,向青春.铸造,2005; 54:539) |
| [2] | Kumar M.Physica,1995; 212B:391 |
| [3] | БaΤшeв A И,translated by Zhang J S.Crystallization of Metal and Alloys Under Pressure.Harbin:Harbin University of Techonology Press,1987:23(БaTншeв A И著,张锦升译.金属和合金在压力下结晶.哈尔滨:哈尔滨工业大学出版社,1987:23) |
| [4] | Mi G B,Li P J,He L J.Chin J Nonferrous Met,2009; 12:2074(弭光宝,李培杰,何良菊.中国有色金属学报,2009; 12:2074) |
| [5] | Ebihara T,Uwatoko Y,Mohri N.J Magn Magn Mater,2004; 272-276:e83 |
| [6] | Wang Z X,Lu J B,Xi Y J,Fan J W.J Alloys Compd,2010; 492:529 |
| [7] | Yu X F,Zhang G Z,Xiao H J,Pan A S,Jia G L,Gao Y Y.J Mater Res,2000; 14(suppl):141(于溪凤,张国志,肖汉杰,潘爱胜,贾光霖,高允彦.材料研究学报,2000; 14(增刊):141) |
| [8] | Zhang G Z,Yu X F,Wang X Y,Jia G L,Gao Y Y.Acta Metall Sin,1999; 35:285(张国志,于溪凤,王向阳,贾光霖,高允彦.金属学报,1999; 35:285) |
| [9] | Yu X F,Zhang G Z,Wang X Y.J Mater Sci,1999; 34:4149 |
| [10] | Li R D,Huang Z P,Bai Y H,Yu H P.Spec Cast Nonferrous Alloys,2003; (6):16(李荣德,黄忠平,白彦华,于海朋.特种铸造及有色合金,2003;(6):16) |
| [11] | Wu R I,Wide G,Perepezko J H.J Mater Sci Technol,2001; 301A:12 |
| [12] | Yao W J,Wang N,Wei B.Mater Sci Eng,2003; A344:10 |
| [13] | Chen Z W,Jiang Y M,Chai Y.Foundry,2009; 58:887(陈忠伟,江雅民,柴艳.铸造,2009; 58:887 |
| [14] | Xu R,Zhao H,Li J,Liu R,Wang W K.Mater Letts,2006;60:783 |
| [15] | Kaibyshev F M R,Lesuer D R,Nieh T G.Mater Sci Eng,2003; A342:169 |
| [16] | Bao Y Q,Yuan C S,Bai Y H,Li R D.Foundry,2011; 60:533(包艳青,衰朝圣,白彦华,李荣德.铸造,2011:60:533) |
| [17] | Liu C M,Zhu X R,Zhou H T.Magnesium Alloy Phase Atlas.Changsha:Central South University Press,2007:334(刘楚明,朱秀荣,周海涛.镁合金相图集.长沙:中南大学出版社,2007:334) |
| [18] | Zhou H T,Zhang Z D,Liu C M,Wang Q W.Mater Sci Eng,2007; A445-446:1 |
| [19] | Yasuo F.J Phys:Condens Mater,2002; 12:10727 |
| [20] | Xu R,Zhao H,Li J,Liu R,Wang W K.Mater Lett,2006;60:783 |
| [21] | Wang Z L.PhD Thesis,Harbin Institute of Technology,2007(王振玲.哈尔滨工业大学博士学位论文,2007) |
| [22] | Li R D,Cao X S,Qu Y D,Xie Y,Li R X,Tian C.Chin J Nonferrous Met,2009; 19:1570(李荣德,曹修生,曲迎东,谢尧,李润霞,田畅.中国有色金属学报,2009; 19:1570) |
| [23] | Sun S H,Li J,Xu R,Zhao H L,Liu R P.Chin J High Pressure Phys,2008; 22:434(孙淑华,李杰,徐瑞,赵海丽,刘日平.高压物理学报,2008;22:434) |
| [24] | Wang W K.Chin J High Pressure Phys,1989; 3:257(王文魁.高压物理学报,1989;3:257) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%