Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8208169 | Results in Physics | 2018 | 26 Pages |
Abstract
The microstructural evolution of primary Mg2Si in Al-20%Mg2Si with Al-3%P master alloy was observed by scanning electron microscope. And the interfacial properties of AlP/Mg2Si interface were investigated using first-principles calculations. The calculation results show that AlP(1â¯0â¯0)/Mg2Si(2â¯1â¯1) and AlP(3â¯3â¯1)/Mg2Si(1â¯1â¯0) interfaces can form steadily. P-terminated AlP(1â¯0â¯0)/Mg2Si(2â¯1â¯1) interface with the largest work of adhesion (4.13â¯J/m2) is theoretically the most stable. The interfacial electronic structure reveals that there are covalent Si-Al, Si-P and Mg-P bonds existing between AlP and Mg2Si slabs. Due to the AlP particles as effective heterogeneous nucleus of Mg2Si, primary Mg2Si particles change from dendrite to octahedron/truncated octahedron, and their sizes decrease to â¼20â¯Î¼m.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Jiayue Sun, Chong Li, Xiangfa Liu, Liming Yu, Huijun Li, Yongchang Liu,