Modification of Primary Mg2Si in Mg-4Si Alloys with Antimony

2012 ◽  
Vol 43 (13) ◽  
pp. 4926-4932 ◽  
Author(s):  
Hui-Yuan Wang ◽  
Qian Li ◽  
Bo Liu ◽  
Nan Zhang ◽  
Lei Chen ◽  
...  
Keyword(s):  
Primary Mg2si

scholarly journals Influence of barium addition on the formation of primary Mg2Si crystals from Al–Mg–Si melts

2021 ◽  
Vol 11 ◽  
pp. 448-465
Author(s):  
Hamidreza Ghandvar ◽  
Kadhim A. Jabbar ◽  
Mohd Hasbullah Idris ◽  
Norhayati Ahmad ◽  
Muhammad Hafiz Jahare ◽  
...  
Keyword(s):  
Primary Mg2si

Synthesis of octahedron and truncated octahedron primary Mg2Si by controlling the Sb contents

CrystEngComm ◽  
2013 ◽  
Vol 15 (9) ◽  
pp. 1787 ◽  
Author(s):  
Lei Chen ◽  
Hui-Yuan Wang ◽  
Dan Luo ◽  
Hua-Yuan Zhang ◽  
Bo Liu ◽  
...  
Keyword(s):  
Truncated Octahedron ◽  
Primary Mg2si

scholarly journals Microstructure Evolution and Performance Improvement of Hypereutectic Al–Mg2Si Metallic Composite with Ca or Sb

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2714
Author(s):  
Min Zuo ◽  
Boda Ren ◽  
Zihan Xia ◽  
Wenwen Ma ◽  
Yidan Lv ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Nucleation Behavior ◽  
X Ray ◽  
Primary Mg2si ◽  
Before And After ◽  
And Performance ◽  
Hardness Values

In this article, the modification effects on Al–Mg2Si before and after heat treatment were investigated with Ca, Sb, and (Ca + Sb). In comparison with single Ca or Sb, the samples with composition modifiers (Ca + Sb) had the optimal microstructure. The sample with a molar ratio for Ca-to-Sb of 1:1 obtained relatively higher properties, for which the Brinell hardness values before and after heat treatment were remarkably increased by 31.74% and 28.93% in comparison with bare alloy. According to differential scanning calorimetry analysis (DSC), it was found that the nucleation behavior of the primary Mg2Si phase could be significantly improved by using chemical modifiers. Some white particles were found to be embedded in the center of Mg2Si phases, which were deduced to be Ca5Sb3 through X-ray diffraction (XRD) and field-emission scanning electron microscope (FESEM) analyses. Furthermore, Ca5Sb3 articles possess a rather low mismatch degree with Mg2Si particles based on Phase Transformation Crystallography Lab software (PTCLab) calculation, meaning that the efficient nucleation capability of Ca5Sb3 for Mg2Si particles could be estimated.

Strontium modification and formation of cubic primary Mg2Si crystals in Mg2Si/Al composite

2008 ◽  
Vol 454 (1-2) ◽  
pp. 142-146 ◽  
Author(s):  
Q.D. Qin ◽  
Y.G. Zhao ◽  
C. Liu ◽  
P.J. Cong ◽  
W. Zhou
Keyword(s):  
Primary Mg2si ◽  
Al Composite

In Situ Mg2Si Reinforced Mg Alloy Synthesized in Mg-SiO2 System

2010 ◽  
Vol 146-147 ◽  
pp. 1775-1779
Author(s):  
Dan Huang ◽  
Yan Li Wang ◽  
Ying Wang ◽  
Hong Bao Cui ◽  
Xue Feng Guo
Keyword(s):  
Thermodynamic Analysis ◽  
Equilibrium Diagram ◽  
Mg Alloy ◽  
Experimental Temperature ◽  
Chinese Script ◽  
Solidification Condition ◽  
Sio2 System ◽  
Primary Mg2si

The thermodynamic analysis in Mg-SiO2 system was conducted for the determination of the priority reaction at experimental temperature. Then, Mg2Si reinforced Mg alloy was synthesized through reaction in Mg-SiO2 system at 730°C, whose Si mass fraction is up to approximately 10%. The thermodynamic analysis and microstructure investigation results show, that generation of reinforcing phase of Mg2Si in Mg alloy from the reaction in Mg-SiO2 system is feasible with lower free energy than that in Mg-Si at the same temperature; and under the experimental temperature and solidification condition, the microstructure of Mg-10Si alloy is composed of coarse primary Mg2Si dendrite crystal, Chinese script type eutectic Mg2Si, and α–Mg phase, the formation of α–Mg holes is resulted from the relatively high cooling rate leading to a deviation from the equilibrium diagram during solidification.

Morphological evolution and growth mechanism of primary Mg2Si phase in Al–Mg2Si alloys

2011 ◽  
Vol 59 (3) ◽  
pp. 1058-1067 ◽  
Author(s):  
C. Li ◽  
Y.Y. Wu ◽  
H. Li ◽  
X.F. Liu
Keyword(s):  
Growth Mechanism ◽  
Morphological Evolution ◽  
Mg2si Phase ◽  
Primary Mg2si

Morphology evolution of primary Mg2Si in Ca-modified Al-Mg2Si alloy with various contents of Mg\Si

CrystEngComm ◽  
2021 ◽  
Author(s):  
Hong–Chen Yu ◽  
Yu-Zhuo Men ◽  
Shu-Guo Yang ◽  
Hui Liu ◽  
Lei Yu ◽  
...  
Keyword(s):  
Morphology Evolution ◽  
Primary Mg2si

Combined influence of the Mg\Si and Ca contents on crystallization of primary Mg2Si in Al-Mg2Si alloy is investigated. Embryos formation of primary Mg2Si can be restricted by the addition of...

Sign in / Sign up

Export Citation Format

Share Document