在热力学计算分析的基础上,用SiO2粉末和纯镁制备Mg-3%Si(质量分数)中间合金,并用光电直读光谱仪测定制备的中间合金Si的含量,表明其含量稳定且可控.用普通重力铸造法制备了Mg-2Y一1Si合金和Mg-3Y-1Si合金,该合金的铸态组织由α-Mg相、(α-Mg+Mg2Si)共晶组织以及在晶内、枝晶间少量分布的点状Mg24Y5相组成.通过对α-Mg晶格常数的计算及通过原子尺寸、电负性、晶体结构的对比,证明Y固溶在基体中形成固溶体.研究表明,Y通过依附在生长界面前沿,有效抑制基体的生长速度,细化基体组织,且随着Y添加量的增加,细化效果更加明显.
参考文献
| [1] | K. Mathis;F. Chmelik;Z. Trojanova;P. Lukac;J. Lendvai .Investigation of some magnesium alloys by use of the acoustic emission technique[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):331-335. |
| [2] | Ktmura K;Nishii K;Kawarada M .Recycling magnesium alloy housings for notebook computers[J].Fujitsu Scientific and Technical Journal,2002,38(01):102-111. |
| [3] | 沙桂英,韩恩厚,于涛,徐永波,刘路,高国忠.Mg-Y-Nd合金的蠕变行为及其微观机制[J].金属学报,2003(10):1025-1030. |
| [4] | Suzuki M.;Inoue R. .Effects of Yttrium on Creep Behavior and Deformation Substructures of Magnesium[J].Materials Science Forum,2000(0):151-156. |
| [5] | Ya Zhang;Xiaoqin Zeng;Liufa Liu .Effects of yttrium on microstructure and mechanical properties of hot-extruded Mg-Zn-Y-Zr alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):320-327. |
| [6] | Jiang QC;Wang HY;Wang Y;Ma BX;Wang JG .Modification of Mg2Si in Mg-Si alloys with yttrium[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):130-135. |
| [7] | Zhang J;Fan Z;Wang Y Q et al.Microstructural development of Al-1 5wt.%Mg2Si in situ composite with misehmetal addition[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2000,281:104-112. |
| [8] | 石雅静,李全安,任文亮,张兴渊.耐热镁合金的开发与研究现状[J].轻合金加工技术,2009(05):1-6. |
| [9] | 陈健美 .Mg-Gd-Y系耐热镁合金的制备及其组织性能研究[D].中南大学,2005. |
| [10] | 马宝霞,王丽萍,郭二军.镧对Mg-Si合金中Mg2Si相变质的影响[J].中国稀土学报,2008(01):87-91. |
| [11] | 黄晓锋,王渠东,刘六法,朱燕萍,袁广银,卢晨,丁文江.混合稀土对Mg-5Al-1Si组织及性能的影响[J].稀有金属材料与工程,2005(05):795-798. |
| [12] | 梁英教;车荫昌.无机物热力学数据手册[M].沈阳:东北大学出版社,1993:220-323. |
| [13] | Fang, D.;Bi, G.;Wang, L.;Li, G.;Jiang, Z. .Microstructures and mechanical properties of Mg-2Y-1Mn-1-2Nd alloys fabricated by extrusion[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(16/17):4383-4388. |
| [14] | LI Yongjun,ZHANG Kui,ZHANG Ya,LI Xinggang,MA Minglong.Microstructural evolution and mechanical properties of Mg-5Y-5Gd-xNd-0.5Zr magnesium alloys at different states[J].稀有金属（英文版）,2010(03):317-322. |
| [15] | 周玉.材料分析方法[M].北京:机械工业出版社,2007:32-78. |
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%